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[交流] 甲酸分子电催化氧化的近期综述--从机理、材料到燃料电池的研究进展已有1人参与

题目：Electrocatalysis of formic acid on palladium and platinum surfaces: from fundamental mechanisms to fuel cell applications
文献出处：Phys. Chem. Chem. Phys. 2014, 16, 20360-20376.
DOI: 10.1039/c4cp03151b
作者：K. Jiang, H. X. Zhang, S. Zou and W. B. Cai.
摘要部分：
Formic acid as a natural biomass and a CO2 reduction product has attracted considerable interest in renewable energy exploitation, serving as both a promising candidate for chemical hydrogen storage material and a direct fuel for low temperature liquid fed fuel cells. In addition to its chemical dehydrogenation, formic acid oxidation (FAO) is a model reaction in the study of electrocatalysis of C1 molecules and the anode reaction in direct formic acid fuel cells (DFAFCs). Thanks to a deeper mechanistic understanding of FAO on Pt and Pd surfaces brought about by recent advances in the fundamental investigations, the ‘‘synthesis-by-design’’ concept has become a mainstream idea to attain high-performance Pt- and Pd-based nanocatalysts. As a result, a large number of eﬃcient nanocatalysts have been obtained through diﬀerent synthesis strategies by tailoring geometric and electronic structures of the two primary catalytic metals. In this paper, we provide a brief overview of recent progress in the mechanistic studies of FAO, the synthesis of novel Pd- and Pt-based nanocatalysts as well as their practical applications in DFAFCs with a focus on discussing studies significantly contributing to these areas in the past five years.
关键词: formic acid oxidation; electrocatalysis; catalyst; synthesis-by-design; direct formic acid fuel cell.

甲酸分子在铂族金属，尤其是Pt和Pd表面的电催化氧化行为，一直以来都是电化学研究人员密切关注的焦点。一方面，甲酸作为简单的C1小分子，结构简单，同时也是甲醇、甲醛等氧化过程中的重要中间体，是研究这类有机小分子电氧化机制的重要模型；另一方面，甲酸作为生物质液体燃料和CO2还原产物，安全无毒，对Nafion膜的渗透性很低，因而在实际直接甲酸燃料电池填充中允许使用较高的浓度，可以获得高能量密度和功率密度。

本文中作者就Pd、Pt基材料表面上甲酸电氧化的机理（包括直接路径中活性中间体的争议、间接路径中CO累积的过程等），新型催化材料的设计（包括几何结构、电子结构的调制，新型载体的开发以及纳米材料的分散度等），以及直接甲酸燃料电池的进展（包括MEA结构、压膜工艺、催化剂在全电池中的筛选等）三个方面进行了系统的评述，为后续相关表面化学、电化学和材料化学的研究提供借鉴参考。

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附件 1 : Electrocatalysis_of_Formic_Acid_on_Pd_and_Pt_Surfaces.pdf

2014-10-31 16:46:27, 3.81 M