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Hydrogen Peroxide as a Sustainable Energy Carrier: Electrocatalytic Production of Hydrogen Peroxide and the Fuel Cell

机译：过氧化氢作为可持续能源载体：过氧化氢的电生产和燃料电池

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摘要

This review describes homogeneous and heterogeneous catalytic reduction of dioxygen with metal complexes focusing on the catalytic two-electron reduction of dioxygen to produce hydrogen peroxide. Whether two-electron reduction of dioxygen to produce hydrogen peroxide or four-electron O2-reduction to produce water occurs depends on the types of metals and ligands that are utilized. Those factors controlling the two processes are discussed in terms of metal-oxygen intermediates involved in the catalysis. Metal complexes acting as catalysts for selective two-electron reduction of oxygen can be utilized as metal complex-modified electrodes in the electrocatalytic reduction to produce hydrogen peroxide. Hydrogen peroxide thus produced can be used as a fuel in a hydrogen peroxide fuel cell. A hydrogen peroxide fuel cell can be operated with a one-compartment structure without a membrane, which is certainly more promising for the development of low-cost fuel cells as compared with two compartment hydrogen fuel cells that require membranes. Hydrogen peroxide is regarded as an environmentally benign energy carrier because it can be produced by the electrocatalytic two-electron reduction of O2, which is abundant in air, using solar cells; the hydrogen peroxide thus produced could then be readily stored and then used as needed to generate electricity through the use of hydrogen peroxide fuel cells.
机译：这篇综述描述了金属配合物对双氧的均相和非均相催化还原，重点是双氧的催化双电子还原以产生过氧化氢。产生双氧的双氧还原生成过氧化氢还是发生四氧的O2还原生成水取决于所使用的金属和配体的类型。关于催化中涉及的金属-氧气中间体，讨论了控制这两个过程的那些因素。用作氧的选择性双电子还原的催化剂的金属配合物可以用作电催化还原以产生过氧化氢的金属配合物修饰的电极。这样产生的过氧化氢可以用作过氧化氢燃料电池中的燃料。过氧化氢燃料电池可在不具有膜的单室结构下运行，与需要膜的两室氢燃料电池相比，这无疑对于开发低成本燃料电池更有希望。过氧化氢被认为是对环境无害的能量载体，因为它可以通过使用太阳能电池通过电催化双电子还原空气中富含的O2来产生；这样产生的过氧化氢然后可以容易地储存，然后根据需要通过使用过氧化氢燃料电池来发电。

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