Bifunctional Photoelectrode Driven by Charged Domain Walls in Ferroelectric Bi2WO6
Year: 2020
Type: article
Abstract: Photoelectrochemical technology provides a promising way to solve the emerging energy crisis, yet it still faces obstacles like weak charge transfer and separation of traditional photoelectrodes. Here, by using single crystalline epitaxial ferroelectric Bi2WO6 thin films, a bifunctional photoelectrode for photoelectrochemical water splitting is demonstrated, which originates from the in-plane ferroelectricity and charged domain walls. The optimized anodic (cathodic) photocurrent density is 0.175 (0.240) mA cm–2 at 1.23 V (0 V) vs RHE in Na2SO4 (pH = 7) electrolyte solution. Manipulations of the in-plane polarization and charged domain walls provide an alternative catalyzing strategy toward efficient and controllable photoelectrochemical water splitting.
Source: ACS Applied Energy Materials
Institutions: Beijing Normal University, Air Force Medical University, Chinese Academy of Sciences, Research Center for Eco-Environmental Sciences, Institute of Physics, Songshan Lake Materials Laboratory, Hazara University, Beijing Institute of Technology, State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $5,000
OpenAlex ID: W3020319952