Photoelectrocatalytic sea water splitting using Kirkendall diffusion grown functional Co3O4 film

Title
Photoelectrocatalytic sea water splitting using Kirkendall diffusion grown functional Co3O4 film
Author
이정호
Keywords
Co3O4; Kirkendall-diffusion; Photoelectrocatalytic; Seawater splitting; Hydrogen generation
Issue Date
2017-10
Publisher
ELSEVIER SCIENCE BV
Citation
SOLAR ENERGY MATERIALS AND SOLAR CELLS, v. 171, Page. 267-274
Abstract
Earth-abundant, non-toxic, and stable porous Co3O4 film grown by Kirkendall-diffusion is developed for efficient photoelectrocatalytic seawater splitting. Semitransparent Co3O4 films are found highly active hydrogen evolution reaction (HER) photocatalyst with stable performances. Dual band gap (1.5 eV and 2.3 eV) p-type Co3O4 samples exhibiting photo induced HER current density of 25 mA/cm(2) is obtained with overpotential of 0.83 V in the sea-water. Our Co3O4 sample possesses Tafel slope of 20 mV/dec, incident photon to the current conversion efficiency of ˃ 8%, and charge transfer resistance of 3.4 Omega/cm(2). Photo induced Mott-Schottky analysis was applied to find the flat band potential corresponding to the lower band gap value and exhibited strong influence on the majority carrier concentrations and shifting of flat band potential. Electrical properties of Co3O4 material and losses associated in seawater splitting were carefully studied using the Mott-Schottky and electrochemical impedance spectroscopy. Present studies on seawater splitting using Co3O4 not only suggest photoelectrocatalytic hydrogen generation but also usefulness for efficient sea salts formation.
URI
https://www.sciencedirect.com/science/article/pii/S0927024817303744http://repository.hanyang.ac.kr/handle/20.500.11754/72456
ISSN
0927-0248; 1879-3398
DOI
10.1016/j.solmat.2017.06.058
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE