Universal dependence of hydrogen oxidation and evolution reaction activity of platinum-group metals on pH and hydrogen binding energy
Abstract
An understanding how pH affects the activity of hydrogen oxidation reaction (HOR) and hydrogen evolution reaction (HER) is key to developing active, stable, and affordable HOR/HER catalysts for hydroxide exchange membrane fuel cells and electrolyzers. A common linear correlation between hydrogen binding energy (HBE) and pH is observed for four supported platinum-group metal catalysts (Pt/C, Ir/C, Pd/C, and Rh/C) over a broad pH range (0 to 13), suggesting that the pH dependence of HBE is metal-independent. A universal correlation between exchange current density and HBE is also observed on the four metals, indicating that they may share the same elementary steps and rate-determining steps and that the HBE is the dominant descriptor for HOR/HER activities. The onset potential of CO stripping on the four metals decreases with pH, indicating a stronger OH adsorption, which provides evidence against the promoting effect of adsorbed OH on HOR/HER.
- Authors:
-
- Univ. of Delaware, Newark, DE (United States). Dept. of Chemical and Biomolecular Engineering and Center for Catalytic Science and Technology
- Columbia Univ., New York, NY (United States). Dept. of Chemical Engineering
- Publication Date:
- Research Org.:
- Univ. of Delaware, Newark, DE (United States)
- Sponsoring Org.:
- USDOE Advanced Research Projects Agency - Energy (ARPA-E)
- OSTI Identifier:
- 1466569
- Grant/Contract Number:
- AR0000009
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Science Advances
- Additional Journal Information:
- Journal Volume: 2; Journal Issue: 3; Journal ID: ISSN 2375-2548
- Publisher:
- AAAS
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; Hydrogen oxidation and evolution reaction; electrocatalysis; Pt-group metals; hydrogen binding energy
Citation Formats
Zheng, Jie, Sheng, Wenchao, Zhuang, Zhongbin, Xu, Bingjun, and Yan, Yushan. Universal dependence of hydrogen oxidation and evolution reaction activity of platinum-group metals on pH and hydrogen binding energy. United States: N. p., 2016.
Web. doi:10.1126/sciadv.1501602.
Zheng, Jie, Sheng, Wenchao, Zhuang, Zhongbin, Xu, Bingjun, & Yan, Yushan. Universal dependence of hydrogen oxidation and evolution reaction activity of platinum-group metals on pH and hydrogen binding energy. United States. https://doi.org/10.1126/sciadv.1501602
Zheng, Jie, Sheng, Wenchao, Zhuang, Zhongbin, Xu, Bingjun, and Yan, Yushan. Fri .
"Universal dependence of hydrogen oxidation and evolution reaction activity of platinum-group metals on pH and hydrogen binding energy". United States. https://doi.org/10.1126/sciadv.1501602. https://www.osti.gov/servlets/purl/1466569.
@article{osti_1466569,
title = {Universal dependence of hydrogen oxidation and evolution reaction activity of platinum-group metals on pH and hydrogen binding energy},
author = {Zheng, Jie and Sheng, Wenchao and Zhuang, Zhongbin and Xu, Bingjun and Yan, Yushan},
abstractNote = {An understanding how pH affects the activity of hydrogen oxidation reaction (HOR) and hydrogen evolution reaction (HER) is key to developing active, stable, and affordable HOR/HER catalysts for hydroxide exchange membrane fuel cells and electrolyzers. A common linear correlation between hydrogen binding energy (HBE) and pH is observed for four supported platinum-group metal catalysts (Pt/C, Ir/C, Pd/C, and Rh/C) over a broad pH range (0 to 13), suggesting that the pH dependence of HBE is metal-independent. A universal correlation between exchange current density and HBE is also observed on the four metals, indicating that they may share the same elementary steps and rate-determining steps and that the HBE is the dominant descriptor for HOR/HER activities. The onset potential of CO stripping on the four metals decreases with pH, indicating a stronger OH adsorption, which provides evidence against the promoting effect of adsorbed OH on HOR/HER.},
doi = {10.1126/sciadv.1501602},
journal = {Science Advances},
number = 3,
volume = 2,
place = {United States},
year = {Fri Mar 18 00:00:00 EDT 2016},
month = {Fri Mar 18 00:00:00 EDT 2016}
}
Web of Science
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