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- Title
Bifunctional interstitial phosphorous doping strategy boosts platinum-zinc alloy for efficient ammonia oxidation reaction and hydrogen evolution reaction.
- Authors
Yu, Tianqi; Tan, Kexin; Wu, Jia; Zou, Yongjin; Yin, Shibin
- Abstract
It is still a lack of bifunctional catalysts for ammonia oxidation reaction (AOR) and hydrogen evolution reaction (HER) due to their different reaction mechanisms. In this work, P is doped into PtZn alloy by calcination with NaH2PO2 as P source to induce the lattice tensile strain of Pt and the electronic interaction between P and Zn, which optimizes the AOR and HER activity simultaneously. The sample with the optimal P content can drive the AOR peak current density of 293.6 mA·mgPt−1, which is almost 2.7 times of Pt. For HER, the overpotential at −10 mA·cm−2 is only 23 mV with Tafel slope of 34.1 mV·dec−1. Furthermore, only 0.59 V is needed to obtain 50 mA·mgPt−1 for ammonia electrolysis under a two-electrode system. Therefore, this work shows an ingenious method to design bifunctional catalysts for ammonia electrolysis.
- Subjects
HYDROGEN evolution reactions; HYDROGEN oxidation; AMMONIA; ALLOYS; ELECTROLYSIS
- Publication
Nano Research, 2024, Vol 17, Issue 3, p1182
- ISSN
1998-0124
- Publication type
Article
- DOI
10.1007/s12274-023-5962-x