Pd-Ru pair on Pt surface for promoting hydrogen oxidation and evolution in alkaline media

Cao, Longsheng; Soto, Fernando A.; Li, Dan; Deng, Tao; Hu, Enyuan; Lu, Xiner; Cullen, David A.; Eidson, Nico; Yang, Xiao-Qing; He, Kai; Balbuena, Perla B.; Wang, Chunsheng

doi:10.1038/s41467-024-51480-w

Pd-Ru pair on Pt surface for promoting hydrogen oxidation and evolution in alkaline media

Journal Article · Fri Aug 23 00:00:00 EDT 2024 · Nature Communications

DOI:https://doi.org/10.1038/s41467-024-51480-w· OSTI ID:2438734

^[1]; ^[2]; ^[1]; ^[1]; ^[3]; Lu, Xiner ^[4]; ^[5]; Eidson, Nico ^[1]; ^[3]; ^[4]; ^[6]; ^[1]

Univ. of Maryland, College Park, MD (United States)
Pennsylvania State Univ., McKeesport, PA (United States)
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Univ. of California, Irvine, CA (United States)
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Texas A & M Univ., College Station, TX (United States)

Hydrogen oxidation reaction in alkaline media is critical for alkaline fuel cells and electrochemical ammonia compressors. The slow hydrogen oxidation reaction in alkaline electrolytes requires large amounts of scarce and expensive platinum catalysts. While transition metal decoration can enhance Pt catalysts’ activity, it often reduces the electrochemical active surface area, limiting the improvement in Pt mass activity. Here, we enhance Pt catalysts’ activity without losing surface-active sites by using a Pd-Ru pair. Utilizing a mildly catalytic thermal pyrolysis approach, Pd-Ru pairs are decorated on Pt, confirmed by extended X-ray absorption fine structure and high-angle annular dark-field scanning transmission electron microscopy. Density functional theory and ab-initio molecular dynamics simulations indicate preferred Pd and Ru dopant adsorption. The Pd-Ru decorated Pt catalyst exhibits a mass-based exchange current density of 1557 ± 85 A g^–1_metal for hydrogen oxidation reaction, demonstrating superior performance in an ammonia compressor.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)

Grant/Contract Number:: AC05-00OR22725; SC0012704

OSTI ID:: 2438734

Alternate ID(s):: OSTI ID: 2440521

Report Number(s):: BNL--226093-2024-JAAM

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 15; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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