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Title: Correlating Experimentally Determined Hydrogen Binding Energy with Hydrogen Evolution Activity over Metal Monolayers on Molybdenum Nitride

Journal Article · · ACS Catalysis

It is well established that hydrogen binding energy (HBE) is a key descriptor for hydrogen evolution reaction (HER) activity, and such a relationship is a useful tool for searching efficient and cost-effective HER catalysts. However, in almost all cases, the HBE values are obtained from density functional theory (DFT) calculations. Here in this study, temperature programmed desorption (TPD) was used to experimentally determine the HBE values of metal monolayers supported on molybdenum nitride (Mo2N), and electrochemical measurements were performed on the same surfaces. Combined DFT and kinetic Monte Carlo (kMC) simulations were used to validate the trend observed with TPD and the electrochemical HER activity. Depositing one monolayer of Pt on Mo2N led to similar HBE values seen for bulk Pt, and electrochemical measurements showed that monolayer Pt on Mo2N had similar HER activity to that of bulk Pt. Similar studies were also performed for monolayer Pd on Mo2N to confirm the correlation. This work also demonstrates that Mo2N is a promising support to reduce precious metal loading in HER catalysts.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
2267554
Report Number(s):
BNL-225118-2023-JAAM
Journal Information:
ACS Catalysis, Vol. 13, Issue 21; ISSN 2155-5435
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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