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专业: 电化学

[交流] 分享EES上关于surface passivation layer改善光电分解水的综述已有2人参与

简要地叙述一下：
由于能源的长期可持续发展即将成为人类社会发展的制约，太阳能电池可能无法完全解决这个问题，毕竟能量储存问题必须同时解决。而光电分解水可以产生氢气、或者同时还原二氧化碳，产生可以储存的燃料，如果能够解决效率的问题，将成为非常有益的补充。光电分解水发展在渡过了一段兴盛、沉寂之后，目前重新变得非常引人注目。然而，半导体的问题在于能够产生光电压和光电流，但是表面的催化反应却未必同时有效。
本文在半导体-催化剂的异质结构上进行了综述，重点讨论了1）半导体与催化剂的相互作用，2）半导体-表面腐蚀与钝化，3）钝化层-催化剂层的构建以及表面态的控制等方面的一些进展。
引文：102篇
题目：Enhanced photoelectrochemical water-splitting performance of semiconductors by surface passivation layers
作者：Rui Liu,a Zhi Zheng,bc Joshua Spurgeona and Xiaogang Yang*bc
杂志：Energy Environ. Sci., 2014, Advance Article
DOI: 10.1039/C4EE00450G

摘要：An important approach for solving the world's sustainable energy challenges is the conversion of solar energy to chemical fuels. Semiconductors can be used to convert/store solar energy to chemical bonds in an energy-dense fuel. Photoelectrochemical (PEC) water-splitting cells, with semiconductor electrodes, use sunlight and water to generate hydrogen. Herein, recent studies on improving the efficiency of semiconductor-based solar water-splitting devices by the introduction of surface passivation layers are reviewed. We show that passivation layers have been used as an effective strategy to improve the charge-separation and transfer processes across semiconductor–liquid interfaces, and thereby increase overall solar energy conversion efficiencies. We also summarize the demonstrated passivation effects brought by these thin layers, which include reducing charge recombination at surface states, increasing the reaction kinetics, and protecting the semiconductor from chemical corrosion. These benefits of passivation layers play a crucial role in achieving highly efficient water-splitting devices in the near future.

http://pubs.rsc.org/en/content/a ... 00450g#!divAbstract

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