Large-area printing of ferroelectric surface and super-domains for efficient solar water splitting

作     者：Tian, Yu Wei, Yaqing Pei, Minghui Cao, Rongrong Gu, Zhenao Wang, Jing Liu, Kunhui Shang, Dashan Niu, Jiebin An, Xiaoqiang Long, Run Zhang, Jinxing 

作者机构：Department of Physics Beijing Normal University Beijing100875 China School of Basic Medical Science Air Force Medical University Shaanxi Xi’an710032 China College of Chemistry Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education Beijing Normal University Beijing100875 China Key Laboratory of Microelectronics Devices and Integrated Technology Institute of Microelectronics Chinese Academy of Sciences Beijing100029 China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology Beijing100081 China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2020年

核心收录：

主　　题：Ferroelectricity 

摘      要：Surface electronic structures of the photoelectrodes determine the activity and efficiency of the photoelectrochemical water splitting, but the controls of their surface structures and interfacial chemical reactions remain challenging. Here, we use ferroelectric BiFeO3 as a model system to demonstrate an efficient and controllable water splitting reaction by large-area constructing the hydroxyls-bonded surface. The up-shift of band edge positions at this surface enables and enhances the interfacial holes and electrons transfer through the hydroxyl-active-sites, leading to simultaneously enhanced oxygen and hydrogen evolutions. Furthermore, printing of ferroelectric super-domains with microscale checkboard up/down electric fields separates the distribution of reduction/oxidation catalytic sites, enhancing the charge separation and giving rise to an order of magnitude increase of the photocurrent. This large-area printable ferroelectric surface and super-domains offer an alternative platform for controllable and high-efficient photocatalysis. Copyright © 2020, The Authors. All rights reserved.