Increased interface effects of Pt-Fe alloy/CeO2/C with Pt-Fe selective loading on CeO2 for superior performance in direct methanol fuel cell

被引：20

作者：

Chai, Zhanli ^{[1
]}

Zhang, Caixia ^{[1
]}

Wang, Hui ^{[1
]}

Bi, Xi ^{[1
]}

Bai, Ping ^{[1
]}

Wang, Xiaojing ^{[1
]}

机构：

[1] Inner Mongolia Univ, Chem & Chem Engn Dept, Inner Mongolia 010021, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2019年 / 44卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Direct methanol fuel cell; Pt-Fe alloy; Ceria; Interface effect; Selective loading; NITROGEN-DOPED CARBON; PLATINUM NANOPARTICLES; OXYGEN REDUCTION; ETHANOL ELECTROOXIDATION; ALCOHOL ELECTROOXIDATION; CATALYTIC-ACTIVITY; LOW-TEMPERATURE; ELECTROCATALYSTS; OXIDE; OXIDATION;

D O I：

10.1016/j.ijhydene.2019.01.016

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Here, a simple two-step solvothermal approach has been employed to synthesize Pt-Fe alloy (or Pt)/CeO2/C with Pt-Fe (or Pt) selective loading on CeO2 nanoparticles. In addition, the selective loading of Pt-Fe alloy or Pt nanoparticles on the surface of CeO2 is achieved under weak alkaline environment, which is mainly attributed to the opposite electrostatic force between H- enriched on the surface of CeO2 particles and OH - covered with carbon supporters. As-prepared Pt-Fe alloy (or Pt)/CeO2/C catalysts with two-stage loading structures show more excellent electro-catalytic efficiency for methanol oxidation as well as duration compared with commercial Pt/C and Pt-CeO2/C with random loading structure. Further, single-cell assembly based on Pt 3 Fe/CeO2/C as the anode catalyst exhibits a maximum power density of 31.1 mW cm(-2), which is 1.95 times that of an analogous cell based on the commercial Pt/C. These improved performances with considerable low Pt content (<0.3 mg cm(-2)) are mainly ascribed to the abundant three phase interfaces (Pt- CeO2-carbon) induced by the selective and efficient dispersion of Pt nanoparticles on ceria. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：4794 / 4808

页数：15

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