Non-Noble intertransition binary metal alloy electrocatalyst for Hydrogen oxidation and Hydrogen evolution
Non-Noble intertransition binary metal alloy electrocatalyst for Hydrogen oxidation and Hydrogen evolution
Metastable and amorphous intertransition metal alloys of CuW are shown to catalyze both the hydrogen evolution reaction (HER) and the hydrogen oxidation reaction (HOR). The constituent metals exhibit poor activity. The results are consistent with ab initio calculations predicting HER activity for Cu overlayers on W and with the observed changes of the density of states (DOS) at the Fermi level associated with CuW alloy formation. Two maxima in the HER activity are observed as a function of composition corresponding a bulk metastable phase at 80 at % Cu and a second at 50 at % Cu. The alloy at 50 at % also corresponds to a maximum in the HOR activity, whereas the phase at 80 at % Cu is not HOR active. The latter phase is shown to be oxygen-covered at the HOR potential, explaining its inactivity. These results highlight the possibilities of developing non-noble metal alloy catalysts for hydrogen fuel cells
19226-19230
Anastasopoulos, Alexandros
7280a68f-3800-45a0-bbad-0e054707eb3b
Blake, John
16f8eb29-e4eb-4f4b-8da7-2a431fce9caf
Hayden, Brian E.
aea74f68-2264-4487-9d84-5b12ddbbb331
19 August 2011
Anastasopoulos, Alexandros
7280a68f-3800-45a0-bbad-0e054707eb3b
Blake, John
16f8eb29-e4eb-4f4b-8da7-2a431fce9caf
Hayden, Brian E.
aea74f68-2264-4487-9d84-5b12ddbbb331
Anastasopoulos, Alexandros, Blake, John and Hayden, Brian E.
(2011)
Non-Noble intertransition binary metal alloy electrocatalyst for Hydrogen oxidation and Hydrogen evolution.
The Journal of Physical Chemistry C, 115 (39), .
(doi:10.1021/jp205287b).
Abstract
Metastable and amorphous intertransition metal alloys of CuW are shown to catalyze both the hydrogen evolution reaction (HER) and the hydrogen oxidation reaction (HOR). The constituent metals exhibit poor activity. The results are consistent with ab initio calculations predicting HER activity for Cu overlayers on W and with the observed changes of the density of states (DOS) at the Fermi level associated with CuW alloy formation. Two maxima in the HER activity are observed as a function of composition corresponding a bulk metastable phase at 80 at % Cu and a second at 50 at % Cu. The alloy at 50 at % also corresponds to a maximum in the HOR activity, whereas the phase at 80 at % Cu is not HOR active. The latter phase is shown to be oxygen-covered at the HOR potential, explaining its inactivity. These results highlight the possibilities of developing non-noble metal alloy catalysts for hydrogen fuel cells
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Published date: 19 August 2011
Organisations:
Electrochemistry
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Local EPrints ID: 337047
URI: http://eprints.soton.ac.uk/id/eprint/337047
ISSN: 1932-7447
PURE UUID: 37d821f7-cb28-4c73-98bc-8db633463f05
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Date deposited: 16 Apr 2012 15:51
Last modified: 15 Mar 2024 02:36
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Author:
Alexandros Anastasopoulos
Author:
John Blake
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