Rationally Designed/Constructed CoOx/WO3 Anode for Efficient Photoelectrochemical Water Oxidation
Rationally Designed/Constructed CoOx/WO3 Anode for Efficient Photoelectrochemical Water Oxidation
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DOI：
10.1021/acscatal.7b00022
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发表时间：
2017-03-01
期刊：
影响因子：
12.9
通讯作者：
Ding, Yong
中科院分区：
文献类型：
--
作者：
Huang, Jingwei;Zhang, Yan;Ding, Yong
水氧化催化剂通常用于提高WO 3阳极的电荷注入效率。在此，我们同时提高电荷分离效率和电荷注入效率，以及氧化选择性的WO 3光电化学水氧化负载CoOx纳米粒子在中性电解质。通过Clark电极监测所产生的氧，该Clark电极在CoOx/WO 3上显示出高法拉第效率。为了深入了解CoOx在高法拉第效率中的作用，使用旋转环-盘电极系统来检测光电化学水氧化过程中CoOx/WO 3异质结的产物。结果表明，COOL纳米粒子的负载可以提高WO 3的氧化选择性，从而提高WO 3的法拉第效率。
Water oxidation catalysts have been usually used to enhance the charge injection efficiency of WO3 anodes. Herein, we simultaneously improve the charge separation efficiency and charge injection efficiency, as well as the oxidation selectivity of WO3 for photoelectrochemical water oxidation by loading CoOx nanoparticles in a neutral electrolyte. The produced oxygen is monitored by a Clark electrode, which shows a high Faradaic efficiency on CoOx/WO3. In an effort to gain insight into the role of CoOx on the high Faradaic efficiency, the rotating ring-disk electrode system was used to detect the products of the CoOx/WO3 heterojunction in the photoelectrochemical water oxidation process. The results show that the loading of COOL nanoparticles can improve oxidation selectivity of WO3 and therefore improve the Faradaic efficiency of WO3.