Study of the catalyst poisoning and reactivation of Pt nanoparticles on the surface of WO3 nanowire in gasochromic coloration

被引：29
|
作者：
Luo, Jian Yi [1 ,2 ,3 ]
Gong, Li [4 ]
Tan, Hui Dong [2 ,3 ]
Deng, Shao Zhi [2 ,3 ]
Xu, Ning Sheng [2 ,3 ]
Zeng, Qing Guang [1 ]
Wang, Yi [1 ]
机构：
[1] Wuyi Univ, Sch Appl Phys & Mat, Jiangmen 529020, Guangdong, Peoples R China
[2] Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China
[3] Sun Yat Sen Univ, Guangdong Prov Key Lab Display Mat & Technol, Sch Phys & Engn, Guangzhou 510275, Guangdong, Peoples R China
[4] Sun Yat Sen Univ, Instrumental Anal & Res Ctr, Guangzhou 510275, Guangdong, Peoples R China
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2012年 / 171卷
基金：
中国国家自然科学基金;
关键词：
Catalyst poisoning; Catalyst reactivation; Pt-coated WO3 nanowires; Oxygen spillover; Gasochromic coloration; TUNGSTEN-OXIDE; ATOMIC OXYGEN; FILMS; SPILLOVER; PT(111); OXIDATION; HYDROGEN; XPS;
D O I：
10.1016/j.snb.2012.06.042
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
In this paper, we report the degradation of gasochromic coloration performance in Pt-coated WO3 (Pt/WO3) nanowire films when the samples were exposed in air, due to the poisoning of Pt nanoparticles catalyst. The poisoned Pt nanoparticles can be reactivated by annealing in air, suggesting that the degradation originated from the absorption of certain gas species. X-ray photoelectron spectroscopy (XPS) was applied to investigate the gas desorption from poisoned Pt/WO3 nanowire films during the annealing process. Based on the XPS results, a model involving chemical reactions and physical processes on the surface of Pt/WO3 nanowires during annealing was developed to explain the degradation phenomenon. (C) 2012 Published by Elsevier B.V.
引用
收藏
页码：1117 / 1124
页数：8
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