Citation: CHEN Wei, WANG Hui, CHEN Xiao-Ping, MAO Li-Qun, SHANGGUAN Wen-Feng. Photocatalytic Overall Water Splitting on Perovskite H_1.9K_0.3La_0.5Bi_0.1Ta₂O₇ with Pt/WO₃ under the Z Scheme System[J]. Acta Physico-Chimica Sinica, ;2014, 30(11): 2101-2106. doi: 10.3866/PKU.WHXB201408281 shu

Photocatalytic Overall Water Splitting on Perovskite H_1.9K_0.3La_0.5Bi_0.1Ta₂O₇ with Pt/WO₃ under the Z Scheme System

1.
1. Institute of Fine Chemistry and Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan Province, P. R. China;
2. Research Center for Combustion and Environmental Technology, Shanghai Jiao Tong University, Shanghai 200240, P. R. China

Received Date: 29 May 2014
Available Online: 28 August 2014
Fund Project: 国家高技术研究发展计划项目(863) (2012AA051501) (863) (2012AA051501) 国家自然科学基金(51072116) (51072116)上海市科技创新行动计划国际合作项目(12160705700)资助 (12160705700)

Photocatalytic overall water splitting under a two-step photocatalytic (Z scheme) system was studied with layered perovskite H_1.9K_0.3La_0.5Bi_0.1Ta₂O₇ (HKLBT) and Pt/WO₃ used as the hydrogen and oxygen evolution photocatalysts, respectively. The influence of the redox mediator species and the concentration of the redox mediator was investigated. The results showed that overall water splitting (H₂/O₂ volume ratio: 2:1) was achieved using Fe²⁺/Fe³⁺ as the redox mediator, where the hydrogen and oxygen evolution rates reached 66.8 and 31.8 μmol·h^-1 (H₂/O₂ volume ratio: 2.1:1), respectively. A very high concentration of the redox mediator is unable to improve the photocatalytic activity because it is blocked by the carrier mediator redox rate based on the activity of the photocatalysts.
- Photocatalysis,
- Overall water splitting,
- Z scheme system,
- Layered perovskite oxide
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Photocatalytic Overall Water Splitting on Perovskite H1.9K0.3La0.5Bi0.1Ta2O7 with Pt/WO3 under the Z Scheme System

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通讯作者: 陈斌, bchen63@163.com

Photocatalytic Overall Water Splitting on Perovskite H_1.9K_0.3La_0.5Bi_0.1Ta₂O₇ with Pt/WO₃ under the Z Scheme System