A fuel cell with selective electrocatalysts using hydrogen peroxide as both an electron acceptor and a fuel
A fuel cell with selective electrocatalysts using hydrogen peroxide as both an electron acceptor and a fuel
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DOI：
10.1016/j.jpowsour.2007.12.013
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发表时间：
2008-03-15
影响因子：
9.2
通讯作者：
Yasuda, Kazuaki
中科院分区：
文献类型：
--
作者：
Yamazaki, Shin-ichi;Siroma, Zyun;Yasuda, Kazuaki
我们已经实现了一种新型的过氧化氢燃料电池，它同时使用过氧化氢作为电子受体(氧化剂)和燃料。H_2O_2在阳极被氧化，在阴极被还原。发电是基于阳极和阴极对过氧化氢的催化作用的差异。与阴极催化剂还原过氧化氢时相比，阳极催化剂在更负的电位下氧化过氧化氢。我们发现，银适合用作阴极催化剂，而金、铂、钯和镍则适合用作阳极催化剂。碱性电解液是发电所必需的。这种电池的性能可以通过这些电极上过氧化氢的循环伏安曲线清楚地解释出来。这种电池不需要隔膜来分隔阳极和阴极隔间。此外，燃料和电子受体(氧化剂)不需要分开的路径。这些特性使得构建具有单隔室结构的燃料电池成为可能。(C)2007 Elsevier B.V.保留所有权利。
We have realized a novel hydrogen peroxide fuel cell that uses hydrogen peroxide (H2O2) as both an electron acceptor (oxidant) and a fuel. H2O2 is oxidized at the anode and reduced at the cathode. Power generation is based on the difference in catalysis toward H2O2 between the anode and cathode. The anode catalyst oxidizes H2O2 at a more negative potential than that at which the cathode catalyst reduces H2O2. We found that Ag is suitable for use as a cathode catalyst, and that Au, Pt, Pd, and Ni are desirable for use as anode catalysts. Alkaline electrolyte is necessary for power generation. The performance of this cell is clearly explained by cyclic voltammograms of H2O2 at these electrodes. This cell does not require a membrane to separate the anode and cathode compartments. Furthermore, separate paths are not needed for the fuel and electron acceptor (oxidant). These properties make it possible to construct fuel cells with a one-compartment structure. (C) 2007 Elsevier B.V. All rights reserved.