In situ redox strategy for large-scale fabrication of surfactant-free M-Fe2O3 (M = Pt, Pd, Au) hybrid nanospheres

被引：11
|
作者：
Li, Wang [1 ]
Feng, Xilan [1 ]
Liu, Dapeng [1 ]
Zhang, Yu [1 ,2 ]
机构：
[1] Beihang Univ, Sch Chem & Environm, Minist Educ, Key Lab Bioinspired Smart Interfacial Sci & Techn, Beijing 100191, Peoples R China
[2] Beihang Univ, Int Res Inst Multidisciplinary Sci, Beijing 100191, Peoples R China
来源：
SCIENCE CHINA-MATERIALS | 2016年 / 59卷 / 03期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
noble metal; iron oxides; hybrid; CO oxidation; nanospheres; OXYGEN REDUCTION REACTION; METAL-ORGANIC FRAMEWORK; ENHANCED CATALYTIC-ACTIVITY; FACILE SYNTHESIS; CO OXIDATION; EFFICIENT CATALYSTS; NANOPARTICLES; SHELL; PERFORMANCE; NANOSTRUCTURES;
D O I：
10.1007/s40843-016-5038-1
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A facile in situ redox strategy has been developed to fabricate surfactant-free M-Fe2O3 (M = Pt, Pd, Au) hybrid nanospheres. In this process, noble metal salts were directly reduced by the pre-prepared Fe3O4 components in an alkaline aqueous solution without using organic reductants and surfactants. During the redox reaction, Fe3O4 was oxidized into Fe2O3, and the reduzates of noble metal nanoparticles were deposited on the surface of the Fe2O3 nanospheres. Then the characterizations were discussed in detail to study the formation of M-Fe2O3 hybrids. At last, catalytic CO oxidation was selected as a model reaction to evaluate the catalytic performance of these samples. It demonstrates that Pt-Fe2O3 nanospheres can catalyze 100 % conversion of CO into CO2 at 90 degrees C, indicating superior activity relative to Pd-Fe2O3 and Au-Fe2O3.
引用
收藏
页码：191 / 199
页数：9
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