Bifunctional interstitial phosphorous doping strategy boosts platinum-zinc alloy for efficient ammonia oxidation reaction and hydrogen evolution reaction  

作　　者：Tianqi Yu Kexin Tan Jia Wu Yongjin Zou Shibin Yin 

机构地区：[1]Guangxi Key Laboratory of Electrochemical Energy Materials,School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China [2]Guangxi Key Laboratory of Information Materials,Guilin University of Electronic Technology,Guilin 541004,China

出　　处：《Nano Research》2024年第3期1182-1189,共8页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.22162004);the Natural Science Foundation of Guangxi Province(No.2022JJD120011);the Opening Project of Guangxi Key Laboratory of Information Materials(No.211025-K).

摘　　要：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 NaH_(2)PO_(2) 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^(-1)0 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.

关 键 词：PtZn alloy phosphorous doping ammonia oxidation reaction hydrogen evolution reaction bifunctional catalyst 

分 类 号：TQ116.2[化学工程—无机化工]