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Diffusion-Controlled Growth of Oxygen Bubble Evolved from Nanorod-Array TiO2 Photoelectrode

Authors :
Xiaowei Hu
Yechun Wang
Liejin Guo
Zhenshan Cao
Source :
Advances in Condensed Matter Physics, Vol 2014 (2014)
Publication Year :
2014
Publisher :
Wiley, 2014.

Abstract

Nanorod-array structure gains its popularity in photoelectrode design for water splitting. However, the structure’s effects on solid-liquid interface interaction and reaction product transportation still remain unsolved. Gas bubble generally evolved from photoelectrodes, which provides a starting point for the problem-solving. Based on this, investigations on the gas-evolving photoelectrode are carried out in this paper. By experimental studies of wettability on the photoelectrode nanorod-array surface and oxygen bubble growth from anode, we analyzed the interaction affecting the gas-solid-liquid contact behaviors and product transportation mechanism, which is controlled by diffusion due to the concentration gradient of dissolved gases in the aqueous electrolyte and the microconvection caused by the bubble interface movement. In the end, based on the bubble growth characteristics of RB(t)~t0.5 in the experiment, a model describing the product transport mechanism was presented.

Subjects

Subjects :
Physics
QC1-999

Details

Language :
English
ISSN :
16878108 and 16878124
Volume :
2014
Database :
Directory of Open Access Journals
Journal :
Advances in Condensed Matter Physics
Publication Type :
Academic Journal
Accession number :
edsdoj.9d0b5aed507a4b47921a7b446cd6c2e7
Document Type :
article
Full Text :
https://doi.org/10.1155/2014/970891