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Capillary Effect-Enabled Water Electrolysis for Enhanced Electrochemical Ozone Production by Using Bulk Porous Electrode
Zhang, Chen1,2; Xu, Yingfeng1,2; Lu, Ping1; Zhang, Xiaohua1,2; Xu, Fangfang1,2; Shi, Jianlin1,2
2017
发表期刊Journal of the American Chemical Society
ISSN00027863
卷号139期号:46页码:16620-16629
摘要A significant overpotential necessary for the electrochemical oxygen evolution reaction (OER) is one of the most serious disadvantages in water electrolysis, which, on the contrary, gives the probability to electrochemically produce ozone alternative to the common corona discharge. To effectively suppress the competitive OER and improve gaseous ozone escaping, here we present a capillary effect-enabled electrolysis strategy by employing an unusual partial-submersed mode of anode composed of a β-PbO2cuboids-loaded bulk porous Pb, and realize a much enhanced electrocatalytic gaseous ozone production in comparison to the cases of solid Pb counterpart and/or usual submersion operation. Detailed study reveals a capillary pressure-induced "molecular oxygen-locking effect" in the electrolyte fully filled in the porous structure of the electrode area above the electrolyte pool level, which unexpectedly leads to the production of unusual ·O3-intermediate. Distinctive from the traditional electrochemical ozone production (EOP) mechanism dependent on the essential reaction between the atomic oxygen and molecular oxygen, the ·O3-intermediate generation favors the EOP process in the special case where the capillary action is relevant for a porous bulk anode. © 2017 American Chemical Society.
DOI10.1021/jacs.7b07705
EI入藏号20174804460283
EI主题词Molecular oxygen
EI分类号701.1 Electricity: Basic Concepts and Phenomena - 714.1 Electron Tubes - 801.4.1 Electrochemistry - 804 Chemical Products Generally - 804.2 Inorganic Compounds
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文献类型期刊论文
条目标识符http://ir.sic.ac.cn/handle/331005/25440
专题中国科学院上海硅酸盐研究所
作者单位1.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China;
2.University of Chinese Academy of Sciences, Beijing; 100049, China
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GB/T 7714
Zhang, Chen,Xu, Yingfeng,Lu, Ping,et al. Capillary Effect-Enabled Water Electrolysis for Enhanced Electrochemical Ozone Production by Using Bulk Porous Electrode[J]. Journal of the American Chemical Society,2017,139(46):16620-16629.
APA Zhang, Chen,Xu, Yingfeng,Lu, Ping,Zhang, Xiaohua,Xu, Fangfang,&Shi, Jianlin.(2017).Capillary Effect-Enabled Water Electrolysis for Enhanced Electrochemical Ozone Production by Using Bulk Porous Electrode.Journal of the American Chemical Society,139(46),16620-16629.
MLA Zhang, Chen,et al."Capillary Effect-Enabled Water Electrolysis for Enhanced Electrochemical Ozone Production by Using Bulk Porous Electrode".Journal of the American Chemical Society 139.46(2017):16620-16629.
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