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-467
Subject Anodic WO3 Nanoporous Film for Solar Water Oxidation
Authors Pran Krisna Das, Soon Hyung Kang1,*
Advanced Chemicals & Engineering, Chonnam National University, Bangladesh
1Department of Chemical Education, Chonnam National University, Korea
Abstract Nanoporous tungsten trioxide (WO3) photoanodes are potential candidates for the anodic part of a solar water-splitting device that produces hydrogen fuel and oxygen from water. These nanoporous materials can improve performance in photooxidation reactions compared to nonporous materials because of enhancements in light scattering, increases in surface area, light absorption and carrier collection. To evaluate the presence of these effects and their contributions toward energy conversion efficiency, a variety of nanostructured WO3 photoanodes were synthesized by anodization of tungsten foils. Films of nanoporous WO3 platelets were grown via anodization of tungsten foil, the morphology of the films was controlled by the anodization conditions, and the current-voltage performance were studied. The observed photocurrents were consistent with the apparent morphologies of the nanostructured arrays. Measurements of electrochemically active surface area and other physical characteristics were correlated with observed differences in absorbance, external quantum yield, and photocurrent density for the anodized arrays. The capability to quantify these characteristics and relate them to photoanode performance can allow for selection of appropriate structural parameters when designing photoanodes for solar energy conversion. Keywords: Tungsten oxide, anodization, nanoporous, photooxidation, photoanode.
E-mail pkdasdurjoy@gmail.com