TY  - JOUR
AU  - Yu, Tianqi
AU  - Tan, Kexin
AU  - Wu, Jia
AU  - Zou, Yongjin
AU  - Yin, Shibin
PY  - 2024
TI  - Bifunctional interstitial phosphorous doping strategy boosts platinum-zinc alloy for efficient ammonia oxidation reaction and hydrogen evolution reaction
JO  - Nano Research
SN  - 1998-0124
SP  - 1182
EP  - 1189
VL  - 17
IS  - 3
AB  - 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.
UR  - https://doi.org/10.1007/s12274-023-5962-x
DO  - 10.1007/s12274-023-5962-x