Tailoring carbon xerogels' properties to enhance catalytic activity of Pt catalysts towards methanol oxidation

被引：13

作者：

Alegre, C. ^{[1
,2
]}

Baquedano, E. ^{[1
]}

Galvez, M. E. ^{[1
]}

Moliner, R. ^{[1
]}

Lazaro, M. J. ^{[1
]}

机构：

[1] CSIC, Inst Carboquim, Zaragoza 50018, Spain

[2] CNR ITAE, Ist Tecnol Avanzate Energia, I-98126 Messina, Italy

来源：

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

关键词：

Carbon xerogels; Methanol electro-oxidation; Pt catalysts; OXYGEN REDUCTION REACTION; TEMPERATURE FUEL-CELLS; N-X ELECTROCATALYSTS; SOL-GEL PROCESS; TERNARY CATALYSTS; ORGANIC AEROGELS; SUPPORTS; FORMALDEHYDE; RESORCINOL; FUNCTIONALIZATION;

D O I：

10.1016/j.ijhydene.2015.05.169

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：

The work presented herein deals with the study of the influence of the synthesis conditions on the properties of carbon xerogels (CXGs). The study analyzes the effect of the composition of the mixture of carbon gel precursors and the pH on the porous structure, the arrangement of carbon, the surface chemistry and the electrical conductivity. Certain conditions allow obtaining CXGs with a high porosity, high ordering and polymerization degree. CXGs are used as Pt catalyst supports for the electro-oxidation of methanol. CXGs with the higher ordering and polymerization degree result in catalysts with low crystal sizes and good metallic distribution. Such catalysts show the highest activities towards methanol oxidation. CXG-supported Pt catalysts outperform a Vulcan-supported Pt catalyst prepared in the same conditions. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：14736 / 14745

页数：10

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