Electrochemical preparation of Pt-based catalysts on carbon paper treated with Sn sensitization and Pd activation

被引：6
作者：
Ahn, Sang Hyun [1 ]
Choi, Insoo [1 ]
Kwon, Oh Joong [2 ]
Lim, Taeho [1 ]
Kim, Jae Jeong [1 ]
机构：
[1] Seoul Natl Univ, Sch Chem & Biol Engn, Res Ctr Energy Convers & Storage, Seoul 151744, South Korea
[2] Univ Incheon, Dept Energy & Chem Engn, Inchon 406772, South Korea
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2012年 / 37卷 / 01期
基金：
新加坡国家研究基金会;
关键词：
Platinum-based catalyst; Surface treatment; Electrodeposition; Galvanic displacement; Methanol oxidation; Carbon monoxide poisoning; METHANOL FUEL-CELLS; ANODE CATALYST; ELECTROOXIDATION; NANOPARTICLES; OXIDATION; RU; ELECTROCATALYSTS; RUTHENIUM; PLATINUM; CO;
D O I：
10.1016/j.ijhydene.2011.09.074
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：
CoRuPt and CoPtRu catalysts were prepared on carbon paper (CP) using various electrochemical processes including Sn sensitization, Pd activation, Co electrodeposition and galvanic displacement. The Sn Pd process is a surface treatment that guarantees a larger number of nucleation sites on CP for subsequent Co electrodeposition by modifying the surface to be more hydrophilic. Co particles were deposited on Sn-Pd-treated CP (SCP) by controlling deposition potential and time. Then, Pt and Ru galvanic displacements were performed on the Co particles to form CoRuPt/SCP and CoPtRu/SCP catalysts. Electrochemical measurements confirmed that the CoRuPt/SCP - 1 catalyst with a 1.02 Pt/Ru surface molar ratio showed a peak potential of 741 mV (vs. NHE) for methanol oxidation and 637 mV for carbon monoxide stripping. These values were 80 and 8 mV lower, respectively, than those of a PtRu/C commercial catalyst. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
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页码：41 / 50
页数：10
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