Electrochemical hydrogen production coupled with oxygen evolution, organic synthesis, and waste reforming
Electrochemical hydrogen production coupled with oxygen evolution, organic synthesis, and waste reforming
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DOI：
10.1016/j.nanoen.2022.107875
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发表时间：
2022-12-15
期刊：
影响因子：
17.6
通讯作者：
Zhou, Weijia
中科院分区：
文献类型：
--
作者：
Du, Jialei;Xiang, Daili;Zhou, Weijia
氢气被认为是一种理想的绿色能源载体，可以替代化石燃料，缓解全球迅速加剧的能源危机和环境污染问题。由可再生能源产生的电力驱动的水裂解已经引起了H2生产的极大关注。传统的水电解模式包括两个耦合的半反应：析氧反应（OER）和析氢反应（HER）。为了提高阴极HER的效率，人们开发了许多高性能的OER电催化剂，但OER反应动力学缓慢，过电位高，产生的O2气体经济价值低，形成有害的活性氧（ROS）和有害的H2/O2混合物。因此，为了提高阳极反应的效用，降低制氢的成本和功率实现，许多动力学和经济上有利的氧化反应已被提出来取代OER作为电子供体与HER. In这种混合系统的集成，氧化电位被用来合成有价值的化学品和分解有害污染物。本文系统地总结了传统和混合水裂解技术阳极的最新进展。此外，各种替代阳极反应和相应的三维集成电催化剂在碱性介质中已被突出。技术特点，潜在的挑战和未来的前景进行了深入的讨论。本文对电解可再生有机物和有害废弃物低压制氢的研究具有一定的参考价值。
H2 gas is considered to be an ideal green energy carrier that can replace fossil fuels to ameliorate the rapidly increasing global issues of energy crisis and environmental pollution. Water splitting driven by electricity generated from renewable energy sources has attracted immense attention for H2 production. The conventional mode of water electrolysis involves two coupled half-reactions: the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER). Numerous high-performance OER electrocatalysts have been developed to increase the efficiency of the cathodic HER. However, the OER exhibits slow kinetics and high overpotential values, generating the low-economic-value O2 gas which forms the highly damaging reactive oxygen species (ROS) and hazardous H2/O2 mixtures. Therefore, to improve the utility of the anodic reaction and reduce the cost and power implementation of hydrogen production, numerous kinetically and economically favorable oxidation reactions have been proposed to replace the OER as electron donors for integration with the HER. In such hybrid systems, the oxidative potential is used to synthesize valuable chemicals and decompose harmful pollutants. In this review, recent developments in the anodes of conventional and hybrid water splitting technologies have been systematically summarized. Additionally, various alternative anodic reactions and the corresponding 3D integrated electrocatalysts in alkaline media have been highlighted. The technical features, potential challenges, and future perspectives have been thoroughly discussed. This review could promote research on low-voltage hydrogen generation by the electrolysis of renewable organics and harmful wastes.