Dual synergetic catalytic effects boost hydrogen electric oxidation performance of Pd/W_(18)O_(49)  

作　　者：Lingxin Peng Han Tian Xiangzhi Cui Liang Su Ge Meng Zhonghua Ma Shaowen Cao Jianlin Shi 

机构地区：[1]State Key Lab of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China [3]School of Chemistry and Materials Science,Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310024,China [4]School of Chemistry and Chemical Engineering,Huazhong University of Science and Technology(HUST),Wuhan 430074,China [5]State Key Laboratory for Modification of Chemical Fibers and Polymer Materials&College of Materials Science and Engineering,Donghua University,Shanghai 201620,China [6]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China

出　　处：《Nano Research》2021年第7期2441-2450,共10页纳米研究（英文版）

基　　金：The authors gratefully acknowledged the support from the Natural Science Foundation of Shanghai(No.19ZR1479400);the State Key Laboratory for Modication of Chemical Fibers and Polymer Materials,Donghua University(No.KF1818);the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing(Wuhan University of Technology).

摘　　要：Developing anode catalysts of substantially enhanced activity for hydrogen oxidation reaction(HOR)and anti-CO poisoning performance is of great importance for the application of proton exchange membrane fuel cells(PEMFCs).Herein,we report Pd cluster in situ decorated urchin-like W_(18)O_(49)(WO_(2.72))electrocatalysts by a photo-reduction method for high performance HOR.The synthesized Pd-WO_(2.72)-L composite of low loading amount of 0.44 wt.%Pd by Xenon light reduction exhibits markedly high HOR catalytic activity and stability in 0.5 M H_(2)SO_(4),and the specific HOR current density and mass activity of Pd-WO_(2.72)-L are~1.5 and~80 times those of 20 wt.%Pt/C catalyst,respectively.Moreover,excellent anti-CO poisoning ability has also been obtained.The excellent HOR activity and anti-CO poisoning performance of Pd-WO_(2.72)-L have been discussed mainly in terms of the dual synergetic catalytic effects between Pd and WO_(2.72):Pd activation to Pd^(δ+)by the electron transfer from Pd to W promotes the hydrogen adsorption and activation to H*species,which results in largely elevated HOR activity;Pd degradation due to the CO poisoning is effectively prevented by WO_(2.72),which is responsible for the excellent CO-tolerance performance.

关 键 词：hydrogen oxygen reaction tungsten oxide photo-reduction method synergistic effect CO tolerance catalyst 

分 类 号：O64[理学—物理化学]