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Angew Chem Int Ed Engl. 2014 Dec 22;53(52):14433-7. doi: 10.1002/anie.201408222. Epub 2014 Oct 30.

Molybdenum phosphosulfide: an active, acid-stable, earth-abundant catalyst for the hydrogen evolution reaction.

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  • 1Department of Chemical Engineering, Stanford University, Stanford, CA 94305 (USA).

Abstract

Introducing sulfur into the surface of molybdenum phosphide (MoP) produces a molybdenum phosphosulfide (MoP|S) catalyst with superb activity and stability for the hydrogen evolution reaction (HER) in acidic environments. The MoP|S catalyst reported herein exhibits one of the highest HER activities of any non-noble-metal electrocatalyst investigated in strong acid, while remaining perfectly stable in accelerated durability testing. Whereas mixed-metal alloy catalysts are well-known, MoP|S represents a more uncommon mixed-anion catalyst where synergistic effects between sulfur and phosphorus produce a high-surface-area electrode that is more active than those based on either the pure sulfide or the pure phosphide. The extraordinarily high activity and stability of this catalyst open up avenues to replace platinum in technologies relevant to renewable energies, such as proton exchange membrane (PEM) electrolyzers and solar photoelectrochemical (PEC) water-splitting cells.

KEYWORDS:

electrocatalysis; electrochemistry; hydrogen evolution reaction; molybdenum phosphide; phosphosulfide

PMID:
25359678
DOI:
10.1002/anie.201408222
[PubMed]
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