Heteropolyacids for fuel cell applications

被引:106
作者
Kourasi, M. [1 ]
Wills, R. G. A. [1 ]
Shah, A. A. [1 ,2 ]
Walsh, F. C. [1 ]
机构
[1] Univ Southampton, Electrochem Engn Lab, Southampton SO17 1BJ, Hants, England
[2] Univ Warwick, Sch Engn, Coventry CV4 7AL, W Midlands, England
关键词
Heteropolyacid; Polyoxometalate; Electrochemical energy conversion; Fuel cell; PROTON-EXCHANGE MEMBRANE; CONDUCTING COMPOSITE MEMBRANES; POLYETHER-ETHER-KETONE; HIGH-TEMPERATURE OPERATION; ANODE CATALYST LAYER; PHOSPHOTUNGSTIC ACID; POLYMER ELECTROLYTE; SILICOTUNGSTIC ACID; PHOSPHOMOLYBDIC ACID; HYBRID MEMBRANES;
D O I
10.1016/j.electacta.2014.02.006
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Polyoxometalates, and in particular heteropolyacids, are being studied extensively for potential applications, including as surfactants, chemical cleaners, catalysts and additives in fuel cell component materials. Heteropolyacids comprise MOx polyhedra (usually octahedral), in which M is typically W, Mo or V, surrounding one or more heteroatoms. They are commonly characterised under the Wells-Dawson, Keggin or lacunary structural configurations. It is possible to tailor their properties by modifying the central metal ion and the addenda atoms. In the context of fuel cells they are used as additives to enhance catalyst performance, as membrane additives to improve ionic conductance, and as stand-alone catalysts (electrode immobilised or electrolyte solvated). More recently they have been employed as catholyte redox mediators in novel fuel cells. This review summarises the electrochemical properties of heteropolyacids and provides a critical assessment of their applications, with a focus on fuel cells. Progress with regards to heteropolyacid-based electrochemical science and technology is summarised and key challenges are highlighted. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:454 / 466
页数:13
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