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HERO ID
5061653
Reference Type
Journal Article
Title
Reversible electron storage in an all-vanadium photoelectrochemical storage cell: Synergy between vanadium redox and hybrid photocatalyst
Author(s)
Liu, D; Zi, Wei; Sajjad, SD; Hsu, C; Shen, Yi; Wei, M; Liu, F
Year
2015
Journal
ACS Catalysis
ISSN:
2155-5435
Volume
5
Issue
4
Page Numbers
2632-2639
Language
English
DOI
10.1021/cs502024k
Web of Science Id
WOS:000352464400070
Relationship(s)
has erratum
5061660
(vol 5, pg 2632, 2015)
Abstract
Colossal solar energy conversion and storage studies using photoelectrochemical cells (PECs) have been undertaken in the past four decades; however, how to efficiently utilize solar energy despite the intermittent nature of sunlight still remains a challenge. In this paper, a WO3/TiO2 hybrid photoelectrode was coupled with our newly developed all-vanadium photoelectrochemical cell (PEC) with the aim of implementing photoelectrochemical solar energy conversion and storage. Zero-resistance ammetry (ZRA) and electrochemical impedance spectroscopy (EIS) were employed to study the photoelectrochemical response of this system in the conversion and storage of solar energy both under illumination and in the dark. The preliminary results proved the feasibility of this approach to store/release solar energy, even under dark conditions and showed that hydrogen tungsten bronze was responsible for the storage and release of photogenerated electrons from the semiconductor. The results also indicated an important synergy between electron storage and the all-vanadium electrolytes, which potentially offers great reversibility, high-capacity electron storage, and significant improvement in the photocurrent. To better understand the observed photoelectrochemical and electrochemical impedance behavior of our system, a model that unfolds the WO3 electron storage mechanism and photogenerated charge carrier pathways in the all-vanadium PEC is proposed.
Keywords
vanadium redox; photoelectrochemical cell; WO3/TiO2; reversible electron storage; hydrogen tungsten bronze; solar energy
Tags
IRIS
•
Vanadium Compounds - Oral
Literature Search: Jan 2010 - Mar 2019
WoS
Combined data set
Dataset for title/abstract screening
Excluded- PECO criteria not met (TIAB)
•
Vanadium Inhalation
Literature Search: Jan 2010 – Mar 2019
WoS
Combined Dataset
Dataset for title/abstract screening
Excluded- PECO criteria not met (TIAB)
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