123rd General Meeting of the KCS

Type Poster Presentation
Area Electrochemistry
Room No. Exhibition Hall 2
Time 4월 18일 (목요일) 11:00~12:30
Code ELEC.P-472
Subject Exploration of Photo and Electrochemical Studies with an Efficient Electrocatalyst on BiVO4 Photoelectrode for Photoelectrochemical Water Splitting.
Authors Maheswari Arunachalam, Soon Hyung Kang1,*
Department of Chemistry, Chonnam National University, Korea
1Department of Chemical Education, Chonnam National University, Korea
Abstract Photoelectrochemical (PEC) water splitting to produce clean hydrogen provides a desirable approach to solving global environmental and energy problems. Bismuth vanadate (BiVO4) has emerged as one of the most promising photoanode materials for oxidising water due to its visible light activity and low cost. However, BiVO4 Photocatalyst has suffered by the slow charge separation kinetics at solid/electrode interface that limits the photoelectrochemical performance. In order to minimize the poor properties, we modified the BiVO4 with effective electrocatalysts, which was investigated experimentally under light illumination. The subsequent addition of electrocatalysts as an effective Oxygen evolution catalyst subsequently reduces the large overpotential and generates higher photocurrent. The charge transfer properties of the photoelectrodes can be effectively tuned by controlling the electrocatalysts loaded, thereby optimizing PEC performance. Electrochemical impedance spectroscopy (EIS) evidenced that electrocatalysts deposition can substantially lower the charge transfer resistance (Rct) at the semiconductor interface. Further, the advantages and drawbacks of catalyst deposition routes and the role of photoelectrochemical and advanced spectroscopic techniques for elucidation of the mechanism of the photocatalytic action will be discussed in detail.
E-mail 31maheswari@gmail.com