Umeå universitets logga

umu.sePublikationer
Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Robust hierarchical 3D carbon foam electrode for efficient water electrolysis
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen. Department of Chemistry, University of Danang, University of Science and Technology, 54 Nguyen Luong Bang, Lien Chieu, Danang, Viet Nam.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik.ORCID-id: 0000-0002-6830-2174
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen.
Visa övriga samt affilieringar
2017 (Engelska)Ingår i: Scientific Reports, E-ISSN 2045-2322, Vol. 7, artikel-id 6112Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Herein we report a 3D heterostructure comprising a hierarchical macroporous carbon foam that incorporates mesoporous carbon nanotubes decorated with cobalt oxide nanoparticles as an unique and highly efficient electrode material for the oxygen evolution reaction (OER) in electrocatalytic water splitting. The best performing electrode material showed high stability after 10 h, at constant potential of 1.7 V vs. RHE (reversible hydrogen electrode) in a 0.1 M KOH solution and high electrocatalytic activity in OER with low overpotential (0.38 V vs RHE at 10 mA cm(-2)). The excellent electrocatalytic performance of the electrode is rationalized by the overall 3D macroporous structure and with the firmly integrated CNTs directly grown on the foam, resulting in a large specific surface area, good electrical conductivity, as well as an efficient electrolyte transport into the whole electrode matrix concurrent with an ability to quickly dispose oxygen bubbles into the electrolyte. The eminent properties of the three-dimensional structured carbon matrix, which can be synthesized through a simple, scalable and cost effective pyrolysis process show that it has potential to be implemented in large-scale water electrolysis systems.

Ort, förlag, år, upplaga, sidor
Nature Publishing Group, 2017. Vol. 7, artikel-id 6112
Nationell ämneskategori
Oorganisk kemi Den kondenserade materiens fysik
Identifikatorer
URN: urn:nbn:se:umu:diva-127042DOI: 10.1038/s41598-017-05215-1ISI: 000406285700020PubMedID: 28733585Scopus ID: 2-s2.0-85025588386OAI: oai:DiVA.org:umu-127042DiVA, id: diva2:1040237
Projekt
Bio4Energy
Forskningsfinansiär
Bio4EnergyTillgänglig från: 2016-10-26 Skapad: 2016-10-26 Senast uppdaterad: 2022-09-15Bibliografiskt granskad
Ingår i avhandling
1. Three-dimensional structured carbon foam: synthesis and applications
Öppna denna publikation i ny flik eller fönster >>Three-dimensional structured carbon foam: synthesis and applications
2016 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Recently, due to the unique properties and structures such as large geometric surface area, electrical conductivity and light weight, 3D structured carbon materials have been attracting extensive attention from scientists. Moreover, the materials, which can provide well-defined pathways for reactants to easily access active sites, are extremely useful for energy conversion as well as environmental and catalysis applications. To date, many precursors have been used for fabrication of 3D structured carbon materials including pitch, carbon nanotubes, graphene, and polymer foams.

This thesis, as shown in the thesis title, focus on two main aspects: the study of the characteristics of melamine based carbon foam synthesized at different conditions and their applications. In paper I, it was revealed that through a simple, one-step pyrolysis process, flexible carbon foam synthesized from melamine foam (BasotectÒ, BASF) was obtained. Additionally, through a pyrolysis-activation process, activated carbon foam which possesses hydrophilic nature and high surface area was successfully synthesized. The characteristics of carbon foam such as the hydrophobic/hydrophilic nature, electrical conductivity, mechanical properties and surface chemistry were studied. It was shown that carbon foam could be successfully used as an absorbent in environmental applications e.g. removing of spill oil from water (paper I) or as support for heterogeneous catalysts, which in turn was used not only in gas phase reactions (paper I and IV) but also in an aqueous phase reaction (paper II). Importantly, when combined with a SpinChem® rotating bed reactor (SRBR) (paper II), the monolithic carbon foam/SRBR system brought more advantages than using the foam alone. Additionally, the work in paper III showed the potential of carbon foam in an energy conversion application as anode electrode substrate in alkaline water electrolysis. In summary, the versatility of the carbon foam has been proven through abovementioned lab scale studies and due to the simple, scalable and cost effective pyrolysis and activation processes used for the production, it has potential to be used in large-scale applications. 

Ort, förlag, år, upplaga, sidor
Umeå: Umeå University, 2016. s. 54
Nyckelord
Carbon foam, melamine foam, absorbent, water purification, heterogeneous catalyst, catalyst support, SpinChem®, rotating bed reactor, water electrolysis, energy conversion
Nationell ämneskategori
Materialkemi
Identifikatorer
urn:nbn:se:umu:diva-126852 (URN)978-91-7601-574-2 (ISBN)
Disputation
2016-11-14, KB.E3.01, KBC-huset, Umeå, 13:00 (Engelska)
Opponent
Handledare
Tillgänglig från: 2016-10-28 Skapad: 2016-10-17 Senast uppdaterad: 2018-06-09Bibliografiskt granskad

Open Access i DiVA

fulltext(3388 kB)440 nedladdningar
Filinformation
Filnamn FULLTEXT01.pdfFilstorlek 3388 kBChecksumma SHA-512
e1b08a464f805a9bc66623af3c2ee45cc4b134a0e9e64c89b8aa8635e9cfd403021cdbc235a30370ed9c2e4653e9578c86d6985a1e6f9c5170194d9e043d4c58
Typ fulltextMimetyp application/pdf

Övriga länkar

Förlagets fulltextPubMedScopus

Person

Ngoc Pham, TungSharifi, TivaSandström, RobinSiljebo, WilliamShchukarev, AndreyWågberg, ThomasMikkola, Jyri-Pekka

Sök vidare i DiVA

Av författaren/redaktören
Ngoc Pham, TungSharifi, TivaSandström, RobinSiljebo, WilliamShchukarev, AndreyWågberg, ThomasMikkola, Jyri-Pekka
Av organisationen
Kemiska institutionenInstitutionen för fysik
I samma tidskrift
Scientific Reports
Oorganisk kemiDen kondenserade materiens fysik

Sök vidare utanför DiVA

GoogleGoogle Scholar
Totalt: 441 nedladdningar
Antalet nedladdningar är summan av nedladdningar för alla fulltexter. Det kan inkludera t.ex tidigare versioner som nu inte längre är tillgängliga.

doi
pubmed
urn-nbn

Altmetricpoäng

doi
pubmed
urn-nbn
Totalt: 1011 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf