Platinum single atoms/clusters stabilized in transition metal oxides for enhanced electrocatalysis

被引：44

作者：

Gao, J. J. ^{[1
]}

Du, P. ^{[1
]}

Zhang, Q. H. ^{[2
]}

Shen, X. ^{[2
]}

Chiang, F-K ^{[3
]}

Wen, Y. R. ^{[4
]}

Lin, Xi ^{[1
]}

Liu, X. J. ^{[1
,5
]}

Qiu, H. J. ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Shenzhen 518055, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[3] Natl Inst Clean & Low Carbon Energy, Beijing 102209, Peoples R China

[4] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

[5] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Shenzhen 518055, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2019年 / 297卷

基金：

中国国家自然科学基金;

关键词：

Doping; Single atoms; Clusters; Fuel cells; Water splitting; HIGHLY-ACTIVE ELECTROCATALYST; METHANOL OXIDATION; NANOPARTICLES; CATALYSTS; SUPPORT; CO; EFFICIENT; GRAPHENE; PD; ALLOY;

D O I：

10.1016/j.electacta.2018.11.200

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Tunable amount of monatomic and nanoscale Pt clusters were trapped in TiO2 and CeO2 nanowires via a generic one-step dealloying approach from designed Al-Ti-Pt and Al-Ce-Pt precursor alloys. It was demonstrated that the doped Pt were in the form of both single atoms and Pt clusters stabilized in TiO2 or CeO2 nanowires. Electrochemical tests manifested that these highly dispersed Pt doped metal oxide greatly enhanced the utilization efficiency of noble metals. When used as an electrocatalyst for the methanol oxidation reaction (MOR) or hydrogen evolution reaction (HER), the Pt-TiO2 or Pt-CeO2 catalysts after activation exhibited much higher catalytic activity and stability as compared to the commercial Pt/C catalyst. The highest mass activity of the Pt-0.2-TiO2 catalysts obtained from dealloying Al85Ti14.8Pt0.2 reached 1200 mA mg(-1) for MOR, more than six times higher than that of Pt/C. The mass activity of the Pt-0.2-CeO2 for HER is around 50 times that of Pt/C. With clear advantages of low costs, simple fabrication procedure, and enhanced catalytic performance, these Pt-metal oxide nanowires can be suitable for many catalytic reactions. (C) 2018 Published by Elsevier Ltd.

引用

页码：155 / 162

页数：8

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