Universal dependence of hydrogen oxidation and evolution reaction activity of platinum-group metals on pH and hydrogen binding energy
| Author(s) | Zheng, Jie | |
| Author(s) | Sheng, Wenchao | |
| Author(s) | Zhuang, Zhongbin | |
| Author(s) | Xu, Bingjun | |
| Author(s) | Yan, Yushan | |
| Ordered Author | Jie Zheng, Wenchao Sheng, Zhongbin Zhuang, Bingjun Xu, Yushan Yan | |
| UD Author | Zheng, Jie | en_US |
| UD Author | Zhuang, Zhongbin | en_US |
| UD Author | Xu, Bingjun | en_US |
| UD Author | Yan, Yushan | en_US |
| Date Accessioned | 2017-04-07T15:27:00Z | |
| Date Available | 2017-04-07T15:27:00Z | |
| Copyright Date | Copyright © 2016 © The Authors | en_US |
| Publication Date | 2016-01-14 | |
| Description | Publisher's PDF | en_US |
| Abstract | 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. | en_US |
| Department | University of Delaware. Department of Chemical & Biomolecular Engineering. | en_US |
| Department | University of Delaware. Center for Catalytic Science & Technology. | en_US |
| Citation | Zheng, Jie, et al. "Universal dependence of hydrogen oxidation and evolution reaction activity of platinum-group metals on pH and hydrogen binding energy." Science advances 2.3 (2016): e1501602. | en_US |
| DOI | https://doi.org/10.1126/sciadv.1501602 | en_US |
| ISSN | 3- 2375-2548 | en_US |
| URL | http://udspace.udel.edu/handle/19716/21218 | |
| Language | en_US | en_US |
| Publisher | American Association for the Advancement of Science | en_US |
| dc.rights | Creative Commons Attribution-NonCommercial 4.0 International (CC BY- NC 4.0) | en_US |
| dc.source | Science Advances | en_US |
| dc.source.uri | http://advances.sciencemag.org/ | en_US |
| Title | Universal dependence of hydrogen oxidation and evolution reaction activity of platinum-group metals on pH and hydrogen binding energy | en_US |
| Type | Article | en_US |
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