122nd General Meeting of the KCS

Type Oral Presentation
Area Oral Presentation of Young Scholars in Electrochemistry
Room No. Room 320
Time THU 10:30-:
Code ELEC.O-7
Subject Amorphous NiOOH catalyst Coupled V2O5/BiVO4 Inverse Opal Heterojunction Photoanodes for Improved Solar Water Oxidation
Authors Arunachalam Maheswari, Soon Hyung Kang1,*
Department of Chemistry, Chonnam National University, Korea
1Department of Chemical Education, Chonnam National University, Korea
Abstract Photoelectrochemical water splitting (PEC) into hydrogen and oxygen using photocatalyst coupled electrocatalysts could potentially address the large-scale energy needs of future societies. The viability of this approach with rational design on porous inverse opal constructed V2O5 photocatalyst coupled semiconductor BiVO4 heterojunction accompanied by efficient amorphous NiOOH for PEC water splitting is systematically explored.V2O5 IO film shows low photocurrent density due to the high-density surface states and short hole diffusion length that stimulate the high recombination of the photogenerated charges occurring in the bulk and surface states. V2O5@BiVO4 inverse opal structure increases the light absorption efficiency via ordered uniform pathway, control surface light reflection and increasing light scattering in all direction. The deposition of the BiVO4 layer on the photoanode to create a junction as well as to reduce the charge recombination at the surface trapping states of V2O5 IO film. Further, NiOOH layer was electrodeposited on V2O5@ BiVO4 IO film to enhance the PEC performance at a low potential region.
E-mail 31maheswari@gmail.com