Enhanced oxygen reduction reaction activity through spillover effect by Pt-Y(OH)3/C catalyst in direct methanol fuel cells

被引：28

作者：

Nishanth, K. G. ^{[1
]}

Sridhar, P. ^{[1
]}

Pitchumani, S. ^{[1
]}

机构：

[1] CSIR, Cent Electrochem Res Inst, Madras Unit, Madras 600113, Tamil Nadu, India

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2011年 / 13卷 / 12期

关键词：

DMFCs; Electro-catalysis; ORR catalyst; Methanol-tolerant catalyst; Pt-Y(OH)(3); PT-ALLOY; ELECTROCATALYSTS; PLATINUM;

D O I：

10.1016/j.elecom.2011.09.021

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Dynamic spillover of metal oxide aided by yttrium hydroxide through its altervalent nature is utilized to develop a new carbon supported Pt-Y(OH)(3) hybrid catalyst with varying Pt:Y atomic ratio of 1:1, 2:1 and 3:1 and characterized by X-Ray diffraction and Transmission electron microscopy techniques. Pt-Y/C catalysts exhibit significant improvement in oxygen reduction reaction (ORR) over commercial Pt/C. The effects of composition toward ORR with and without methanol have been studied. Among the various Pt-Y(OH)(3)/C catalysts, the one with Pt to Y in 3:1 atomic ratio shows the highest activity for ORR in aqueous HClO4 solution without methanol while the one with Pt to Y in 2:1 atomic ratio shows the maximum activity for ORR in presence of methanol. A direct methanol fuel cell (DMFC) employing carbon-supported Pt-Y(OH)(3) as the cathode catalyst delivers a peak-power density of 105 mW/cm(2) at 70 degrees C as compared to a peak-power density of 64 mW/cm(2) obtained with the DMFC employing carbon-supported Pt catalyst operating under similar conditions. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1465 / 1468

页数：4

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