工程科学学报2016，Vol.38Issue(5)：714-720,7.DOI:10.13374/j.issn2095-9389.2016.05.017
Ag@Pt核壳结构纳米粒子催化剂在电催化过程中的失效分析
Invalidation analysis of Ag@Pt core-shell nanoparticle catalysts in the electrocatalytic process
摘要
Abstract
Ag@Pt core-shell nanoparticles ( Ag@Pt NPs) composed of an Ag nanoparticle core and a Pt shell were prepared by the seed-mediated growth method and self-assembly technology. The electrocatalytic properties of Ag@Pt NPs to methanol before and after invalidation were measured and compared during the electrocatalytic process. The invalidation mechanism was studied by trans-mission electron microscopy, high-resolution electron microscopy, and X-ray photoelectron spectroscopy. The results show that the cavitation phenomena of Ag@Pt NPs occur during the cyclic voltammetry process with a threshold voltage of 0. 5 V and become more obvious with the increase of time. Ag@Pt particles turn into Pt hollow shells coated by Ag after cavitation, which is the reason that the catalytic property of Ag@Pt NPs to methanol distinctly decreases during the electrocatalytic process.关键词
纳米复合材料/纳米颗粒/催化剂/失效/空化/电催化/伏安扫描Key words
nanocomposites/nanoparticles/catalysts/invalidation/cavitation/electrocatalysis/cyclic voltammetry分类
通用工业技术引用本文复制引用
陈珂,纪箴,张一帆,贾成厂,杨善武..Ag@Pt核壳结构纳米粒子催化剂在电催化过程中的失效分析[J].工程科学学报,2016,38(5):714-720,7.基金项目
国家重点基础研究发展计划资助项目(2014GB120000) （2014GB120000）
国家自然科学基金资助项目(51471023) （51471023）
