Active
and durable anode electrocatalysts are of vital importance
for practical implementation of fuel cells. However, the surface-adsorbed
reaction intermediates, especially CO, easily poison and deactivate
the electrocatalysts. Here, we report ultrathin molybdenum–palladium
hydride (MoPdH) bimetallene as a high-efficiency electrocatalyst for
the methanol oxidation reaction. This exhibits a 6.0-fold enhancement
of mass activity relative to commercial Pd black catalyst. Alloying
with Mo strongly enhances the H binding ability of Pd and thereby
stabilizes the MoPdH bimetallene. The resulting ultrathin hydride
structure and the stabilization of it by Mo alloying yields a MoPdH
bimetallene with the outstanding CO tolerance. The stabilization is
understood in terms of the Miedema rule, which thus provides a new
opportunity for catalyst design boosting the commercialization of
fuel cells based on stable bimetallene hydride nanosheets.
By joint theoretical and experimental efforts, we designed the MoP-(101) surface, and explored its potential as catalysts for urea production. Our computations revealed that N2 and CO2 reactants can be...
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