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A Double‐Passivation Water‐Based Galvanic Displacement Method for Reproducible Gram‐Scale Production of High‐Performance Platinum‐Alloy Electrocatalysts
Author(s) -
Gatalo Matija,
Bele Marjan,
RuizZepeda Francisco,
Šest Ervin,
Šala Martin,
Kamšek Ana Rebeka,
Maselj Nik,
Galun Timotej,
Jovanovič Primož,
Hodnik Nejc,
Gaberšček Miran
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201903568
Subject(s) - materials science , passivation , galvanic cell , alloy , proton exchange membrane fuel cell , catalysis , platinum , chemical engineering , galvanic corrosion , carbon fibers , metal , corrosion , metallurgy , nanotechnology , composite material , chemistry , biochemistry , layer (electronics) , composite number , engineering
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 °C.