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Relatively Low Crystalline Heterojunction Ru‐RuP 2 /WC for Hydrogen Evolution Reaction in Proton Exchange Membrane Water Electrolyzer
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Abstract
Substantial challenges remain in fabricating inexpensive yet highly efficient and durable electrocatalysts for HER applications. In this study, a relatively low‐crystallinity Ru‐RuP
2
heterostructure supported on tungsten carbide (LC‐Ru‐RuP
2
/WC) was fabricated through a precisely controlled gas‐phase phosphidation strategy. The optimized LC‐Ru‐RuP
2
/WC catalyst demonstrates exceptional performance in acidic media, achieving a low overpotential of 48.08 mV at 10 mA cm
−2
while maintaining 95% activity retention over 30 h. Density functional theory (DFT) calculation results reveal that LC‐Ru‐RuP
2
/WC enhances HER via interfacial electron redistribution optimizes the d‐band center position, weakening hydrogen adsorption strength (rf
H*
= 0.042 eV) and effectively lowering the water dissociation energy barrier.
Title: Relatively Low Crystalline Heterojunction Ru‐RuP
2
/WC for Hydrogen Evolution Reaction in Proton Exchange Membrane Water Electrolyzer
Description:
Abstract
Substantial challenges remain in fabricating inexpensive yet highly efficient and durable electrocatalysts for HER applications.
In this study, a relatively low‐crystallinity Ru‐RuP
2
heterostructure supported on tungsten carbide (LC‐Ru‐RuP
2
/WC) was fabricated through a precisely controlled gas‐phase phosphidation strategy.
The optimized LC‐Ru‐RuP
2
/WC catalyst demonstrates exceptional performance in acidic media, achieving a low overpotential of 48.
08 mV at 10 mA cm
−2
while maintaining 95% activity retention over 30 h.
Density functional theory (DFT) calculation results reveal that LC‐Ru‐RuP
2
/WC enhances HER via interfacial electron redistribution optimizes the d‐band center position, weakening hydrogen adsorption strength (rf
H*
= 0.
042 eV) and effectively lowering the water dissociation energy barrier.
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