Phosphorus-doping-tuned PtNi concave nanocubes with high-index facets for enhanced methanol oxidation reaction  

作　　者：Aixin Fan Congli Qin Ruxia Zhao Haixiao Sun Hui Sun Xiaoping Dai Jin-Yu Ye Shi-Gang Sun Yanhong Lu Xin Zhang 

机构地区：[1]School of Chemistry&Material Science,Langfang Normal University,Langfang 065000,China [2]ShanDong Drug and Food Vacational Colleage,Weihai 255000,China [3]State Key Laboratory of Heavy Oil Processing,College of Chemical Engineering,China University of Petroleum,Beijing 102249,China [4]State Key Laboratory of Physical Chemistry of Solid Surfaces,Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China

出　　处：《Nano Research》2022年第8期6961-6968,共8页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(No.21573286);the Natural Science Foundation of Hebei Province of China(No.E2020408004);the Funded by Science and Technology Project of Hebei Education Department(No.QN2021124).

摘　　要：Surface engineering has been found to be an efficient strategy to boost the catalytic performance of noble-metal-based nanocatalysts.In this work,a small amount of P was doped to the surface of PtNi concave cube(P-PtNi CNC).Interestingly,the P-PtNi CNC nanocatalyst shows an enhanced methanol oxidation reaction(MOR)performance with achieving 8.19 times of specific activity than that of comercial Pt/C.The electrochemical in situ Fourier transform infrared spectroscopy(FTIR)results reveal that the surface P doping promotes the adsorption energy of OH,enhancing the resistance against CO poisoning.Therefore,the intermediate adsorbed CO(COads)reacted with adsorbed OH(OHads)through the Langmuir–Hinshelwood(LH)mechanism to generate CO_(2)and release surface active sites for further adsorption.This work provides a promising strategy via the incorporation of non-metallic elements into the PtNi alloys bounded with high-index facets(HIFs)as efficient fuel cell catalysts.

关 键 词：P doping high-index facets methanol oxidation reaction in situ Fourier transform infrared spectroscopy 

分 类 号：O64[理学—物理化学]