One-Step Synthesis of a High Performance Pt-Fe3O4 Catalyst: Intermetallic Al13Fe4 as a Platform and Precursor

被引：9

作者：

Kameoka, Satoshi ^{[1
]}

Wakabayashi, Satoru ^{[1
]}

Abe, Eiji ^{[2
]}

Tsai, An Pang ^{[1
,3
]}

机构：

[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat IMRAM, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan

[2] Univ Tokyo, Dept Mat Sci & Engn, Bunkyo Ku, Tokyo 1138656, Japan

[3] Natl Inst Mat Sci NIMS, Tsukuba, Ibaraki 3050047, Japan

来源：

CATALYSIS LETTERS | 2016年 / 146卷 / 07期

关键词：

One-step synthesis; Intermetallic compound; Al13Fe4; Leaching; Pt-Fe3O4; Monodispersed Pt nanocrystals; OXYGEN REDUCTION REACTION; CO OXIDATION; FE; ENHANCEMENT; HYDROGENATION; NANOPARTICLES; TEMPERATURE; ADSORPTION; METHANOL; ALLOYS;

D O I：

10.1007/s10562-016-1757-y

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：

A one-step process was developed to prepare catalysts with monodispersed Pt nanocrystals on Fe3O4, based on leaching of the intermetallic compounds Al76.5-xFe23.5Ptx (at%: x = 0, 0.05, 0.5, 1) with an aqueous 10 wt% NaOH solution. In this process, the intermetallic Al13Fe4 lattice acts as a platform in which Pt atoms can be homogeneously dispersed, and also serves as a precursor for subsequent leaching. Compared with conventional preparation methods, including impregnation and coprecipitation, this one-step process eliminates the need for thermal treatments such as high temperature calcination and/or reduction, thus minimizing the sintering or crystal grain growth problems caused by these treatments. Consequently, the materials derived from Al76Fe23.5Pt0.5 exhibit high catalytic performance during CO oxidation and the CO-PROX reaction due to the monodispersed Pt nanocrystals in the porous or nanoparticle Fe3O4 matrix.

引用

页码：1309 / 1316

页数：8

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