Platinum Group Metal-Free NiMo Hydrogen Oxidation Catalysts: High Performance and Durability in Alkaline Exchange Membrane Fuel Cells Full article
Journal |
Journal of Materials Chemistry A, Materials for Energy and Sustainability
ISSN: 2050-7488 , E-ISSN: 2050-7496 |
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Output data | Year: 2017, Volume: 5, Number: 46, Pages: 24433-24443 Pages count : 11 DOI: 10.1039/c7ta08718g | ||||||||||||||
Tags | REDUCTION REACTION CATALYSTS; EVOLUTION REACTION; CATHODE CATALYST; OXYGEN; OXIDE; WATER; ACID; ELECTROCATALYSTS; ELECTROLYTES; STABILITY | ||||||||||||||
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Affiliations |
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Funding (1)
1 | Office of Energy Efficiency and Renewable Energy | DE-EE0006962 |
Abstract:
We introduce a new platinum group metal-free (PGM-free) hydrogen oxidation electrocatalyst with superior performance in anodes of alkaline exchange membrane fuel cells (AEMFCs). A carbon-supported bimetallic nickel-molybdenum catalyst was synthesized by thermal reduction of transition metal precursors on the surface of a carbon support (KetjenBlack 600J). The mass-weighted activity of 4.5 A gMe-1 determined in a liquid electrolyte 0.1 M NaOH using a rotating disk electrode (RDE) technique is comparable to the value reported for Pd/C with a comparable particle size under similar conditions. This NiMo/KB catalyst was integrated in a membrane electrode assembly (MEA) using an alkaline exchange membrane and ionomer. Single AEMFC tests performed in a H2/O2 configuration resulted in a record power density output of 120 mW cm-2 at 0.5 V, the MEA was found to be durable under the conditions of potential hold of 0.7 V for 115 h. For the first time, operando X-ray computed tomography (CT) experiments were performed demonstrating liquid water formation at the PGM-free anode during cell operation, and in situ ambient pressure X-ray photoelectron spectroscopy (APXPS) and X-ray absorption spectroscopy (APXAS) were used to study the role of molybdenum in hydrogen adsorption.
Cite:
Kabir S.
, Lemire K.
, Artyushkova K.
, Roy A.
, Odgaard M.
, Schlueter D.
, Oshchepkov A.
, Bonnefont A.
, Savinova E.
, Sabarirajan D.C.
, Mandal P.
, Crumlin E.J.
, Zenyuk I.V.
, Atanassov P.
, Serov A.
Platinum Group Metal-Free NiMo Hydrogen Oxidation Catalysts: High Performance and Durability in Alkaline Exchange Membrane Fuel Cells
Journal of Materials Chemistry A, Materials for Energy and Sustainability. 2017. V.5. N46. P.24433-24443. DOI: 10.1039/c7ta08718g WOS Scopus РИНЦ
Platinum Group Metal-Free NiMo Hydrogen Oxidation Catalysts: High Performance and Durability in Alkaline Exchange Membrane Fuel Cells
Journal of Materials Chemistry A, Materials for Energy and Sustainability. 2017. V.5. N46. P.24433-24443. DOI: 10.1039/c7ta08718g WOS Scopus РИНЦ
Dates:
Submitted: | Oct 2, 2017 |
Accepted: | Nov 6, 2017 |
Published online: | Nov 6, 2017 |
Published print: | Dec 14, 2017 |
Identifiers:
Web of science | WOS:000416340300047 |
Scopus | 2-s2.0-85036478940 |
Elibrary | 35480236 |
Chemical Abstracts | 2017:1789116 |
Chemical Abstracts (print) | 168:7390 |
OpenAlex | W2767458687 |