A Double-Passivation Water-Based Galvanic Displacement Method for Reproducible Gram-Scale Production of High-Performance Platinum-Alloy Electrocatalysts

被引：36

作者：

Gatalo, Matija ^{[1
,2
]}

Bele, Marjan ^{[1
]}

Ruiz-Zepeda, Francisco ^{[1
,3
]}

Sest, Ervin ^{[1
]}

Sala, Martin ^{[4
]}

Kamsek, Ana Rebeka ^{[1
]}

Maselj, Nik ^{[5
]}

Galun, Timotej ^{[2
,5
]}

Hodnik, Nejc ^{[5
,6
]}

Gaberscek, Miran ^{[1
,2
]}

机构：

[1] Natl Inst Chem, Dept Chem Mat, Hajdrihova 19, Ljubljana 1000, Slovenia

[2] Natl Inst Chem, Fac Chem & Chem Technol, Vecna Pot 113, Ljubljana 1000, Slovenia

[3] Inst Met & Technol, Dept Phys & Chem Mat, Lepi Pot 11, Ljubljana 1000, Slovenia

[4] Natl Inst Chem, Dept Analyt Chem, Hajdrihova 19, Ljubljana 1000, Slovenia

[5] Natl Inst Chem, Dept Catalysis & Chem React Engn, Hajdrihova 19, Ljubljana 1000, Slovenia

[6] Univ Nova Gorica, Vipavska 13, Nova Gorica 5000, Slovenia

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2019年 / 58卷 / 38期

关键词：

double passivation; galvanic displacement; oxygen reduction reaction; platinum alloys; proton exchange membrane fuel cell; OXYGEN REDUCTION REACTION; CORE-SHELL; CATALYTIC-ACTIVITY; MONOLAYER SHELL; PT-CU/C; STABILITY; NANOPARTICLES; MORPHOLOGY; AU;

D O I：

10.1002/anie.201903568

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Preparation of large quantities of high-performance supported Pt-alloy electrocatalysts is crucial for the faster development and implementation of low-temperature proton exchange membrane fuel cells (PEMFCs). One of the prospective nanofabrication synthesis methods is based on the galvanic displacement (GD) reaction. A facile, highly reproducible, gram scale, water-based double passivation GD method is now presented for the synthesis of carbon-supported Pt-M nanoparticles (M=Cu, Ni, Co). It offers great flexibility over the catalyst design, such as the choice of the sacrificial metal (M), variation of the chemical composition of alloy, variation of total metal loading (Pt+M) on carbon support, or even variation of the carbon support itself. The obtained Pt-alloy catalysts are several times more active compared to a Pt reference and exhibits better stability during accelerated degradation tests performed at 60 degrees C.

引用

页码：13266 / 13270

页数：5

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