Stable and methanol tolerant Pt/TiOx-C electrocatalysts for the oxygen reduction reaction

被引：32

作者：

Esfahani, Reza Alipour Moghadam ^{[1
]}

Videla, Alessandro H. A. Monteverde ^{[1
]}

Vankova, Suetoslava ^{[1
]}

Specchia, Stefania ^{[1
]}

机构：

[1] Politecn Torino, Dept Appl Sci & Technol, I-10129 Turin, Italy

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2015年 / 40卷 / 42期

关键词：

Platinum; Titanium submddes; Oxygen reduction reaction; Methanol tolerance; Stability; FUEL-CELL PERFORMANCE; BIMETALLIC ELECTROCATALYSTS; MONOLAYER ELECTROCATALYSTS; CATALYTIC-ACTIVITY; MESOPOROUS CARBON; DISK ELECTRODE; NANOPARTICLES; STABILITY; ALLOY; OXIDATION;

D O I：

10.1016/j.ijhydene.2015.05.131

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：

Various Pt/TiOx-C catalysts are synthesized by changing the temperature of synthesis of TiOx from 500 to 1000 degrees C. The carbon support is a commercial multi-wall carbon nanotubes. The synthesis temperature of the TiOx affects the structure and morphology of the support generating different types of suboxides, ranging from TiO2 anatase, TiO2 rutile, Ti3O, and Ti3O5. The catalysts are characterized by means of BET, EDX, XRD, and ICP-MS analyses. The obtained catalysts display a Pt loading of 13.6-19.2 wt.%, with a Pt/Ti atomic ratio of 0.177-0.194. The catalysts are electrochemically characterized by CV, CO stripping, and LSV. The presence of Ti3O5 suboxide positively improves the performance of the catalyst with respect to the oxygen reduction reaction, and enhances the catalyst stability under potential cycling, with an increase of the electrochemical active surface area (ECSA) compared to the commercial Pt/Vulcan catalyst. After stability test for 4000 cycles in range of 0.06-1.26 V vs RHE the ECSA that resulted was equal to 22.73 m(2) g(Pt)(-1). Moreover, the catalyst is highly methanol tolerant. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：14529 / 14539

页数：11

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