ACS Catalysis p. 2182 - 2191 (2016)
Update date:2022-08-17
Topics:
Zhang, Qiao
Li, Zheng
Wang, Shengyang
Li, Rengui
Zhang, Xianwen
Liang, Zhenxing
Han, Hongxian
Liao, Shijun
Li, Can
In the semiconductor photocatalyst system for overall water splitting, cocatalysts play crucial roles because they provide not only redox active sites but also charge separation function for photogenerated electrons and holes. In this work, we have investigated the cubic structured NaTaO3 with six equivalent {001} facets to address the following two important questions: Can charge separation occur among the equivalent facets? How can photogenerated charges be separated on the equivalent surface for photocatalytic reactions? Charge location probe experiments by photodepsotion of noble metals and metal oxides show that no spatial charge separation occurs among the six equivalent facets of NaTaO3. However, observation of efficient overall water-splitting reaction upon loading of well-known cocatalyst NiO on the NaTaO3 clearly demonstrates that photogenerated electrons and holes could still be well-separated. In-situ formation of Ni and NiO cocatalysts during the water-splitting process was revealed by X-ray photoelectron spectroscopy and synchrotron X-ray absorption spectroscopy, confirming the role of dual cocatalysts Ni/NiO, where nickel serves as an electron trap (catalytic sites for proton reduction) and NiO serves as a hole trap (catalytic sites for water oxidation). Such vicinal charge separation by dual cocatalysts leads to efficient overall water splitting. (Chemical Equation Presented).
View MoreZhejiang Golden-Shell Pharmaceutical Co.,Ltd.
Contact:+86-576-87501888 / 87501988
Address:No.89 Zhongxing Road. Li'ao, Yuhuan, Zhejiang, China
Zhenjiang Haitong Chemical Industry Co., Ltd.
Contact:+86 (511) 8448-0369
Address:Baoyan Town, Dantu District, Zhenjiang City, Jiangsu, China
Shanghai Micro-mega Industry Co., Ltd.
Contact:0086-21-34628682;57153848
Address:Rm413,No.413,West Meilong Road, Minhang District,Shanghai P R China
Beijing Zhongshuo Pharmaceutical T & D Co.,Ltd
Contact:0086-10-64430626
Address:ea No 16, HEPINGLI,DONGCHENG DISTRICT,BEIJING,P.R.CHINA.
Zhejiang Quzhou Jiancheng Silicone Co., Ltd.(Shanghai Jiancheng Industial and Trade Co, Ltd)
Contact:18957018777 +86-570-3888777
Address:The company production base address: Quzhou City, Zhejiang Province high-tech industrial park Nianhua Road 37
Doi:10.1016/j.jorganchem.2011.07.019
(2011)Doi:10.1016/j.electacta.2004.01.031
(2004)Doi:10.1016/0040-4039(94)88357-2
(1994)Doi:10.1039/c8ob00128f
(2018)Doi:10.1515/hc-2013-0059
(2013)Doi:10.1039/c3dt50288k
(2013)