PtRh alloys on hybrid TiO2 - Carbon support as high efficiency catalyst for ethanol oxidation

被引：16

作者：

Wang, Peng ^{[1
,2
]}

Wen, Ying ^{[1
]}

Yin, Shibin ^{[1
]}

Wang, Ningzhang ^{[3
]}

Shen, Pei Kang ^{[1
]}

机构：

[1] Guangxi Univ, CICREM, Guangxi Key Lab Electrochem Energy Mat, Nanning 530004, Peoples R China

[2] Guangxi Univ, State Key Lab Proc Nonferrous Met & Featured Mat, Nanning 530004, Peoples R China

[3] Guangxi Univ, Sch Comp Elect & Informat, Nanning 530004, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2017年 / 42卷 / 39期

关键词：

PtRh alloys; TiO2-C hybrid materials; Catalyst; Ethanol oxidation; Direct ethanol fuel cells; OXYGEN REDUCTION REACTION; METHANOL OXIDATION; FUEL-CELL; OXIDIZING ETHANOL; ELECTROOXIDATION; ELECTROCATALYSTS; NANOTUBES; NANOPARTICLES; CO; NANOSTRUCTURES;

D O I：

10.1016/j.ijhydene.2017.04.302

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：

High cost and poor stability of catalysts remain major obstacles for the commercialization of direct ethanol fuel cells (DEFCs). In this work, a Pt9Rh/TiO2-C nanostructured catalyst is synthesized via an impregnation-reduction method followed by thermal annealing in N-2 at ambient pressure. X-ray powder diffraction (XRD) and scanning transmission electron microscopy (STEM) are used to characterize the corresponding physico-chemical properties of the as-prepared catalysts. The results reveal that PtRh nanoparticles are uniformly distributed on the TiO2-C hybrid support material. Cyclic voltammetry, linear scan voltammetry, CO-stripping voltammograms, chronoamperometry and chronopotentiometry methods are employed to investigate their catalytic performance for ethanol oxidation. The results show that the Pt9Rh/TiO2-C produced a current density of 1039.5 mA mg(Pt)(-1) which are 3.98, 8.31 and 2.43 times higher than Pt/TiO2-C, Pt/C and Pt9Rh/C, respectively. Furthermore, the Pt9Rh/TiO2-C also has greater resistance to CO-poisoning and displays better stability for ethanol oxidation than other catalysts. Pt9Rh/TiO2-C therefore provides a promising material for ethanol oxidation in direct ethanol fuel cells. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：24689 / 24696

页数：8

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