Umeå University's logo

umu.sePublications
Change search
Link to record
Permanent link

Direct link
Alternative names
Publications (10 of 73) Show all publications
Zhang, H., Aierke, A., Zhou, Y., Ni, Z., Feng, L., Chen, A., . . . Hu, G. (2023). A high-performance transition-metal phosphide electrocatalyst for converting solar energy into hydrogen at 19.6% STH efficiency. Carbon Energy, 5(1), Article ID e217.
Open this publication in new window or tab >>A high-performance transition-metal phosphide electrocatalyst for converting solar energy into hydrogen at 19.6% STH efficiency
Show others...
2023 (English)In: Carbon Energy, E-ISSN 2637-9368, Vol. 5, no 1, article id e217Article in journal (Refereed) Published
Abstract [en]

The construction of high-efficiency and low-cost non-noble metal bifunctional electrocatalysts for water electrolysis is crucial for commercial large-scale application of hydrogen energy. Here, we report a novel strategy with erbium-doped NiCoP nanowire arrays in situ grown on conductive nickel foam (Er-NiCoP/NF). Significantly, the developed electrode shows exceptional bifunctional catalytic activity, which only requires overpotentials of 46 and 225 mV to afford a current density of 10 mA cm−2 for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER), respectively. Density functional theory calculations reveal that the appropriate Er incorporation into the NiCoP lattice can significantly modulate the electronic structure with the d-band centers of Ni and Co atoms by shifting to lower energies with respect to the Fermi level, and optimize the Gibbs free energies of HER/OER intermediates, thereby accelerating water-splitting kinetics. When assembled as a solar-driven overall water-splitting electrolyzer, the as-prepared electrode shows a high and stable solar-to-hydrogen efficiency of 19.6%, indicating its potential for practical storage of intermittent energy.

Place, publisher, year, edition, pages
John Wiley & Sons, 2023
Keywords
bifunctional electrocatalysts, electronic regulation, hydrogen evolution reaction, oxygen evolution reaction, solar-to-hydrogen efficiency
National Category
Other Chemical Engineering
Identifiers
urn:nbn:se:umu:diva-213604 (URN)10.1002/cey2.217 (DOI)000807975000001 ()2-s2.0-85131573101 (Scopus ID)
Funder
Swedish Research Council
Available from: 2023-08-31 Created: 2023-08-31 Last updated: 2023-08-31Bibliographically approved
Li, Z., Chen, M., Zhang, L., Xing, R., Hu, J., Huang, X., . . . Hu, G. (2023). Atomic-level orbital coupling in a tri-metal alloy site enables highly efficient reversible oxygen electrocatalysis. Journal of Materials Chemistry A, 11(5), 2155-2167
Open this publication in new window or tab >>Atomic-level orbital coupling in a tri-metal alloy site enables highly efficient reversible oxygen electrocatalysis
Show others...
2023 (English)In: Journal of Materials Chemistry A, ISSN 2050-7488, E-ISSN 2050-7496, Vol. 11, no 5, p. 2155-2167Article in journal (Refereed) Published
Abstract [en]

Complex multi-metallic alloys with ultra-small sizes have received extensive attention in the fields of Zn-air battery and water splitting, because of their unique advantages including adjustable composition, tailorable active sites, and optimizable electronic structure. In this effort, an atomic-level orbital coupling strategy is presented to effectively regulate the electronic structures of ultra-small tri-metal Fe-Co-Ni nanoalloy particles confined in an N-doped carbon hollow nanobox. As expected, the optimal nanoalloy hybrid material exhibited notable bi-functional catalytic performances toward the oxygen reduction reaction (half-wave potential of 0.902 V) and oxygen evolution reaction (1.589 V at 10 mA cm−2) with a small ΔE of 0.687 V, exceeding the precious-metal-based and many previously reported catalysts. Furthermore, the as-assembled Zn-air device also displayed a superior specific capacity of 894 mA h g−1, a maximal power density of 247 mW cm−2, and impressive durability (over 100 hours). Ultraviolet photoelectron spectroscopy and density functional theory calculations revealed that the electronic structures could be finely tuned and optimized through ternary metal alloying, resulting in a suitable d-band center and advantageous interfacial charge-transfer, which in turn could effectively reduce the involved energy barriers in the electrocatalytic process and significantly boost its intrinsic activity of reversible oxygen catalysis. Thus, this work affords an effective method for the rational creation of bi-functional non-noble-metal-based electrocatalysts for sustainable energy technology.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2023
National Category
Materials Chemistry
Identifiers
urn:nbn:se:umu:diva-203977 (URN)10.1039/d2ta08566f (DOI)000910536900001 ()2-s2.0-85146157789 (Scopus ID)
Funder
Swedish Research Council, 2017-04862Swedish Research Council, 2021-04629Swedish Energy Agency, 45419-1Swedish Foundation for Strategic Research, Agenda 2030-PUSH
Available from: 2023-01-24 Created: 2023-01-24 Last updated: 2023-09-21Bibliographically approved
Zhou, M., Tang, T., Qin, D., Cheng, H., Wang, X., Chen, J., . . . Hu, G. (2023). Hematite nanoparticle decorated MIL-100 for the highly selective and sensitive electrochemical detection of trace-level paraquat in milk and honey. Sensors and actuators. B, Chemical, 376, Article ID 132931.
Open this publication in new window or tab >>Hematite nanoparticle decorated MIL-100 for the highly selective and sensitive electrochemical detection of trace-level paraquat in milk and honey
Show others...
2023 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 376, article id 132931Article in journal (Refereed) Published
Abstract [en]

An octahedral metal-organic framework, MIL-100, was synthesized by a hydrothermal method followed by high-temperature calcination. Thereafter, hematite nanoparticles were assembled on its surface to form Fe2O3-MIL-100, which was used to develop an electrochemical sensor for the sensitive detection of paraquat (PQ). The Fe2O3-MIL-100-based electrochemical sensor showed appreciable sensing performance under optimized conditions, with a linear response in the range of 0.01–30 μM and a limit of detection of 2.6 nM. The Fe2O3-MIL-100-based electrode produced an excellent current response to PQ even after 20 d of storage. Notably, the Fe2O3-MIL-100-based electrochemical sensor exhibited high sensitivity and selectivity for PQ detection in milk and honey samples. Therefore, the fabricated sensor can be an effective tool for the rapid detection of PQ in foods.

Place, publisher, year, edition, pages
Elsevier, 2023
Keywords
Electrochemical sensor, Fe2O3-MIL-100, Food analysis, Paraquat determination
National Category
Analytical Chemistry
Identifiers
urn:nbn:se:umu:diva-202578 (URN)10.1016/j.snb.2022.132931 (DOI)000904404300001 ()2-s2.0-85145555317 (Scopus ID)
Funder
Swedish Research Council, 2017-04862Swedish Research Council, 2021-04629Swedish Energy Agency, 45419-1Swedish Foundation for Strategic Research, 2030-PUSH
Available from: 2023-01-12 Created: 2023-01-12 Last updated: 2023-09-05Bibliographically approved
Zhang, S., Fan, X., Jiang, S., Yang, D., Wang, M., Liu, T., . . . Yue, Q. (2023). High sensitive assay of formaldehyde using resonance light scattering technique based on carbon dots aggregation. Arabian Journal of Chemistry, 16(6), Article ID 104786.
Open this publication in new window or tab >>High sensitive assay of formaldehyde using resonance light scattering technique based on carbon dots aggregation
Show others...
2023 (English)In: Arabian Journal of Chemistry, ISSN 1878-5352, E-ISSN 1878-5379 , Vol. 16, no 6, article id 104786Article in journal (Refereed) Published
Abstract [en]

Formaldehyde (FA) is widely used in industry and also common in daily life. Finding an efficient method to determine FA is quite an industrial challenge. Herein, a novel method based on a resonance light scattering (RLS) technique was developed for the detection of FA with high sensitivity. Carbon dots (CDs) were used as RLS probes. CDs were obtained via one-pot solvothermal treatment from o-phenylenediamine. CDs showed yellow fluorescence with a quantum yield of 0.41. Due to the multiple amino groups on the surface of CDs, FA can be captured easily by formation of a covalent C = N bond based on the Schiff-base reaction. Owing to the covalent crosslinking, CD nanoparticles aggregated, and even formed precipitate. The aggregation of CDs induced RLS enhancement, where the RLS increment was linearly related to the concentration of FA ranging from 4 nM to 1.6 mM, with a limit of detection (LOD) of 1.6 nM. In comparison with many previous reports, the present RLS method showed a wider linear range and lower LOD. Furthermore, the RLS system was successfully used to detect FA in real food samples. The proposed system has prospective applicability in the detection of FA in food fields.

Place, publisher, year, edition, pages
Elsevier, 2023
Keywords
Carbon dots, Food samples, Formaldehyde detection, Resonance light scattering, Schiff-base reaction
National Category
Materials Chemistry
Identifiers
urn:nbn:se:umu:diva-205938 (URN)10.1016/j.arabjc.2023.104786 (DOI)000955599900001 ()2-s2.0-85149877491 (Scopus ID)
Available from: 2023-03-27 Created: 2023-03-27 Last updated: 2023-09-05Bibliographically approved
Bi, Z., Zhang, H., Zhao, X., Wang, Y., Tan, F., Chen, S., . . . Hu, G. (2023). Highly dispersed La−O/N−C sites anchored in hierarchically porous nitrogen-doped carbon as bifunctional catalysts for high-performance rechargeable Zn−air batteries. Energy Storage Materials, 54, 313-322
Open this publication in new window or tab >>Highly dispersed La−O/N−C sites anchored in hierarchically porous nitrogen-doped carbon as bifunctional catalysts for high-performance rechargeable Zn−air batteries
Show others...
2023 (English)In: Energy Storage Materials, ISSN 2405-8289, E-ISSN 2405-8297, Vol. 54, p. 313-322Article in journal (Refereed) Published
Abstract [en]

Inexpensive, high-activity bifunctional catalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are imperative for the development of energy storage and conversion systems. A nitrogen-doped carbon material with a micro−meso−macroporous structure doped with La (LaPNC) containing La−O/N−C active sites is prepared using SiO2 particle templating of carbon and a metal node exchange strategy. The coordination environment of La sites stabilized by two oxygen and four nitrogen atoms (LaO2N4), is further verified by X-ray absorption spectroscopy. The ORR half-wave potential reaches 0.852 V, and the OER overpotential reaches 263 mV at 10 mA cm−2. The Zn−air battery, with LaPNC as the air cathode, has a maximum power density of 202 mW cm−2 and achieves stable charge−discharge for at least 100 h without a significant increase or decrease in the charge or discharge voltages, respectively. Density functional theory calculations suggest that LaO2N4 sites exhibit the lowest activation free energy and the most easily desorbed oxygen capacity. This study provides new insights into the design of efficient, durable bifunctional catalysts as alternatives to precious-metal-based catalysts.

Place, publisher, year, edition, pages
Elsevier, 2023
Keywords
Micro−meso−macroporous structure, Oxygen evolution reaction, Oxygen reduction reaction, Single-atom catalyst, Zn−air battery
National Category
Other Chemical Engineering
Identifiers
urn:nbn:se:umu:diva-213601 (URN)10.1016/j.ensm.2022.10.045 (DOI)000882427400001 ()2-s2.0-85143809055 (Scopus ID)
Funder
Swedish Research Council
Available from: 2023-08-31 Created: 2023-08-31 Last updated: 2023-08-31Bibliographically approved
Tan, F., Zhou, Y., Zhang, H., Sun, P., Li, H., Liu, X., . . . Hu, G. (2023). Improving the hydrogen evolution reaction activity of molybdenum-based heterojunction nanocluster capsules via electronic modulation by erbium–nitrogen–phosphorus ternary doping. Chemical Engineering Journal, 454(Part 1), Article ID 140079.
Open this publication in new window or tab >>Improving the hydrogen evolution reaction activity of molybdenum-based heterojunction nanocluster capsules via electronic modulation by erbium–nitrogen–phosphorus ternary doping
Show others...
2023 (English)In: Chemical Engineering Journal, ISSN 1385-8947, E-ISSN 1873-3212, Vol. 454, no Part 1, article id 140079Article in journal (Refereed) Published
Abstract [en]

The realization of a hydrogen-based economy with robust hydrogen evolution reaction catalysts remains a challenge. In this study, we prepared MoO2/Mo2N3 heterostructure nanoclusters co-doped with nitrogen, phosphorus, and erbium for the first time. The introduction of the nitrogen and phosphorus atoms into the transition metal increases the d-electron density and contracts the d-band, which leads to a rearranged electronic structure of the MoO2/Mo2N3 heterojunction. The coupling of the rare earth erbium dopant with the valence band of the heterojunction leads to the redistribution of the electron density in the catalyst and promotes covalent interaction with the adsorbed intermediates, thereby optimizing the Gibbs free energy of intermediate adsorption and improving the catalytic activity for the hydrogen evolution reaction. Not only is an efficient and economical catalyst for electrolytic aquatic hydrogen production provided in this work, but a new synthesis scheme is also proposed for the rational synthesis of homologous core–shell polymetallic nanostructures with broad application prospects.

Place, publisher, year, edition, pages
Elsevier, 2023
Keywords
Electrocatalysis, Heterointerfaces, Hydrogen evolution reaction, Intrinsic activity, Rare earth element doping
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:umu:diva-201406 (URN)10.1016/j.cej.2022.140079 (DOI)2-s2.0-85142455605 (Scopus ID)
Funder
Swedish Research Council, 2017-04862Swedish Research Council, 2021-04629Swedish Energy Agency, 45419-1Swedish Foundation for Strategic Research, 2030-PUSH
Available from: 2022-12-01 Created: 2022-12-01 Last updated: 2022-12-01Bibliographically approved
Li, Q., Chen, Y., Gao, H., Li, Z., Qiu, D. & Hu, G. (2023). In situ analysis of volatile oil in Angelica sinensis roots by fluorescence imaging combined with mass spectrometry imaging. Talanta: The International Journal of Pure and Applied Analytical Chemistry, 255, Article ID 124253.
Open this publication in new window or tab >>In situ analysis of volatile oil in Angelica sinensis roots by fluorescence imaging combined with mass spectrometry imaging
Show others...
2023 (English)In: Talanta: The International Journal of Pure and Applied Analytical Chemistry, ISSN 0039-9140, E-ISSN 1873-3573, Vol. 255, article id 124253Article in journal (Refereed) Published
Abstract [en]

In this study, the spatial distribution and accumulation dynamics of volatile oil in Angelica sinensis roots was realized by fluorescence imaging combined with mass spectrometry imaging. The laser scanning confocal microscopy was used to determine the optimal excitation wavelength and the fluorescent stability of volatile oil in the sections of Angelica sinensis roots. The results demonstrated that 488 nm was the most suitable excitation wavelength for the identification and quantitative analysis of volatile oil. It was observed that volatile oil accumulated in the oil chamber of the phelloderm and secondary phloem, and the oil canal of the secondary xylem. The results also indicated that there were differences in content during different periods. Furthermore, the MALDI-TOF-MSI technology was used to study the spatial distribution and compare the chemical compositions of different parts of Angelica sinensis roots during the harvest period. A total of 55, 49, 50 and 30 compounds were identified from the head, body, tail of the root and root bark, respectively. The spatial distribution of phthalides, organic acids and other compounds were revealed in Angelica sinensis roots. The method developed in this study could be used for the in situ analysis of volatile oil in Angelica sinensis roots.

Place, publisher, year, edition, pages
Elsevier, 2023
Keywords
Angelica sinensis, Laser scanning confocal microscope, Matrix-assisted laser desorption/ionization mass spectrometry imaging, Volatile oil
National Category
Food Science
Identifiers
urn:nbn:se:umu:diva-203546 (URN)10.1016/j.talanta.2023.124253 (DOI)000963126000001 ()2-s2.0-85145975156 (Scopus ID)
Available from: 2023-01-19 Created: 2023-01-19 Last updated: 2023-09-05Bibliographically approved
Zhang, H., Zhou, Y., Xu, M., Chen, A., Ni, Z., Akdim, O., . . . Hu, G. (2023). Interface engineering on amorphous/crystalline hydroxides/sulfides heterostructure nanoarrays for enhanced solar water splitting. ACS Nano, 17(1), 636-647
Open this publication in new window or tab >>Interface engineering on amorphous/crystalline hydroxides/sulfides heterostructure nanoarrays for enhanced solar water splitting
Show others...
2023 (English)In: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 17, no 1, p. 636-647Article in journal (Refereed) Published
Abstract [en]

Developing highly efficient and stable noble-metal-free electrocatalysts for water splitting is critical for producing clean and sustainable energy. Here, we design a hierarchical transition metal hydroxide/sulfide (NiFe(OH)x-Ni3S2/NF) electrode with dual heterointerface coexistence using a cation exchange-induced surface reconfiguration strategy. The electrode exhibits superior electrocatalytic activities, achieving low overpotentials of 55 mV for hydrogen evolution and 182 mV for oxygen evolution at 10 mA cm-2. Furthermore, the assembled two-electrode system requires voltages as low as 1.55 and 1.62 V to deliver industrially relevant current densities of 500 and 1000 mA cm-2, respectively, with excellent durability for over 200 h, which is comparable to commercial electrolysis. Theoretical calculations reveal that the hierarchical heterostructure increases the electronic delocalization of the Fe and Ni catalytic centers, lowering the energy barrier of the rate-limiting step and promoting O2 desorption. Finally, by implementing the catalysts in a solar-driven water electrolysis system, we demonstrate a record and durable solar-to-hydrogen (STH) conversion efficiency of up to 20.05%. This work provides a promising strategy for developing low-cost and high-efficiency bifunctional catalysts for a large-scale solar-to-hydrogen generation.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2023
Keywords
heterointerface, solar-to-hydrogen, transition metal hydroxide, transition metal sulfide, water splitting
National Category
Physical Chemistry
Identifiers
urn:nbn:se:umu:diva-202085 (URN)10.1021/acsnano.2c09880 (DOI)000903287300001 ()36524746 (PubMedID)2-s2.0-85144410455 (Scopus ID)
Funder
Swedish Research Council, 2017-04862Swedish Energy Agency, 45419-1
Available from: 2023-01-03 Created: 2023-01-03 Last updated: 2023-07-13Bibliographically approved
Zhang, Y., Li, Y., Bi, H., Zhou, S., Chen, J., Zhang, S., . . . Hu, G. (2023). Nanomanganese cobaltate-decorated halloysite nanotubes for the complete degradation of ornidazole via peroxymonosulfate activation. Journal of Colloid and Interface Science, 630, 855-866
Open this publication in new window or tab >>Nanomanganese cobaltate-decorated halloysite nanotubes for the complete degradation of ornidazole via peroxymonosulfate activation
Show others...
2023 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 630, p. 855-866Article in journal (Refereed) Published
Abstract [en]

Peroxymonosulfate (PMS) driven by halloysite nanotubes (HNTs) modified with nanomanganese cobaltate (MnCo2O4) generates reactive oxygen species (ROS) that offer high degradation efficiency and mineralization rates for many typical antibiotic pollutants, such as ornidazole (ONZ). The experimental results show that halloysite nanotubes (HNTs) modified with nanomanganese cobaltate (MnCo2O4@HNTs denoted as MCO@HNTs) can degrade ONZ completely over a wide pH range (6.08–11.00) with little influence of the pH value. MCO@HNTs + PMS exhibited higher catalytic activity and lower Co- and Mn-ion leaching rates. It also showed a strong anti-interference effect on natural lake water and anions. Additionally, PMS can be quickly activated and consumed in natural lakes to avoid secondary pollution. The roasting of MCO@HNTs showed good catalytic activity and stability after degrading ONZ. The combination of ion quenching and electron paramagnetic resonance (EPR) analysis illustrated that the MCO@HNTs + PMS system had a strong oxidation capacity, and the produced singlet oxygen (1O2) was the main ROS for ONZ degradation. The degradation pathway of ONZ via the MCO@HNTs + PMS system was proposed based on the types of intermediates determined via liquid chromatography-mass spectrometry (LC-MS). This comprehensive study shows the preparation of a simple, environmentally friendly, and cheap PMS activation catalyst that has practical application value in the treatment of antibiotic wastewater and provides a focus on actual water testing with residual amount of PMS.

Place, publisher, year, edition, pages
Elsevier, 2023
Keywords
Bimetallic oxide, Halloysite nanotubes, Manganese cobalt, Ornidazole degradation, Peroxymonosulfate activation
National Category
Environmental Sciences
Identifiers
urn:nbn:se:umu:diva-213597 (URN)10.1016/j.jcis.2022.10.060 (DOI)000882779700011 ()36283268 (PubMedID)2-s2.0-85140304908 (Scopus ID)
Available from: 2023-08-29 Created: 2023-08-29 Last updated: 2023-08-29Bibliographically approved
Ma, Y.-B., Wang, Y.-W., Zhang, D.-F., Jia, X.-X., Wang, Y., Zhou, S.-X., . . . Hu, G.-Z. (2023). One-pot synthesis of Pd-Au-alloy-nanoparticle-decorated graphene oxide functionalized with dodecahydrododecaborate cluster for rapid and complete reduction of 4-nitrophenol at room temperature. Rare Metals, 42(11), 3622-3629
Open this publication in new window or tab >>One-pot synthesis of Pd-Au-alloy-nanoparticle-decorated graphene oxide functionalized with dodecahydrododecaborate cluster for rapid and complete reduction of 4-nitrophenol at room temperature
Show others...
2023 (English)In: Rare Metals, ISSN 1001-0521, E-ISSN 1867-7185, Vol. 42, no 11, p. 3622-3629Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Springer Nature, 2023
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:umu:diva-215094 (URN)10.1007/s12598-023-02453-3 (DOI)001077917700001 ()2-s2.0-85172924516 (Scopus ID)
Funder
Swedish Research Council, 2017-04862Swedish Research Council, 2021-04629
Available from: 2023-10-13 Created: 2023-10-13 Last updated: 2024-01-05Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-0324-2788

Search in DiVA

Show all publications