Ultrafine nanoporous PdFe/Fe3O4 catalysts with doubly enhanced activities towards electro-oxidation of methanol and ethanol in alkaline media

被引：97

作者：

Zhang, Zhonghua ^{[1
]}

Zhang, Chi ^{[1
]}

Sun, Junzhe ^{[1
]}

Kou, Tianyi ^{[1
]}

Bai, Qingguo ^{[1
]}

Wang, Yuan ^{[1
]}

Ding, Yi ^{[1
]}

机构：

[1] Shandong Univ, Ctr Adv Energy Mat & Technol Res, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ,Sch Mat Sci & Engn, Jinan 250061, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2013年 / 1卷 / 11期

基金：

高等学校博士学科点专项科研基金;

关键词：

OXYGEN REDUCTION REACTION; SCANNING ELECTROCHEMICAL MICROSCOPY; CORE-SHELL NANOPARTICLES; TEMPERATURE FUEL-CELLS; FORMIC-ACID OXIDATION; ELECTROCATALYTIC ACTIVITY; BIMETALLIC CATALYSTS; THERMODYNAMIC GUIDELINES; ALCOHOL OXIDATION; PD;

D O I：

10.1039/c3ta01464a

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, we report the fabrication of ultrafine nanoporous PdFe/Fe3O4 electrocatalysts by a facile dealloying strategy. The results show that the phase formation of the as-dealloyed samples is dependent upon the Pd : Fe atomic ratio in the Al-Pd-Fe ternary precursors. The size of ligaments is as small as similar to 2 nm in the nanoporous structure of the as-dealloyed samples, which is the smallest among the literature data reported for nanoporous metals/alloys. The present nanoporous PdFe/Fe3O4 nanocomposites show excellent electrocatalytic activities towards the oxidation of methanol and ethanol in alkaline media due to the double enhancement from Fe3O4 and Fe in PdFe. In addition, the nanoporous PdFe/Fe3O4 sample dealloyed from the Al75Pd12.5Fe12.5 precursor exhibits the highest electrocatalytic activity. These materials are potential anode electrocatalysts for applications in direct alcohol fuel cells.

引用

页码：3620 / 3628

页数：9

共 80 条

[11] ROLE OF PRECURSOR ALLOY PHASES AND INTERMEDIATE OXIDES IN THE PREPARATION OF RANEY AND URUSHIBARA IRON [J].