Highly Efficient and Stable Cadmium Chalcogenide Quantum Dot/ZnO Nanowires for Photoelectrochemical Hydrogen Generation
SCIE
SCOPUS
- Title
- Highly Efficient and Stable Cadmium Chalcogenide Quantum Dot/ZnO Nanowires for Photoelectrochemical Hydrogen Generation
- Authors
- Seol, M; Jang, JW; Cho, S; Lee, JS; Yong, K
- Date Issued
- 2013-01-22
- Publisher
- AMER CHEMICAL SOC
- Abstract
- Although cadmium chalcogenide quantum dot-sensitized photoanode can utilize the whole visible region of the solar spectrum, its poor photochemical stability owing to hole-induced anodic corrosion remains a major problem for the application in photoelectrochemical hydrogen generation systems. Here, modification with IrOx center dot nH(2)O, a well-known water-oxidation catalyst substantially improves the photochemical stability of the quantum dot-sensitized photoanode. Moreover, it induces an increased photocurrent and a cathodic shift of the onset potential. This is the first example that an oxygen-evolution catalyst is employed on a quantum dot-sensitized electrode system, and it shows 13.9 mA cm(-2) (at 0.6 V) and -0.277 V vs the reversible hydrogen electrode (RHE), which are the highest photocurrent density and the lowest onset potential attained with a ZnO-based electrode, respectively. An average hydrogen evolution rate of 240 mu mol h(-1) cm(-2) at 0.6 V vs RHE has been achieved on a IrOx center dot nH(2)O efficiency. modified electrode, with almost 100% of faradaic
- Keywords
- photoelectrochemical cell; hydrogen generation; ZnO nanowire; cadmium chalcogenide; SENSITIZED SOLAR-CELLS; WATER OXIDATION; NANOTUBE ARRAYS; PHOTOANODE; ABSORPTION; BIVO4
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/13956
- DOI
- 10.1021/CM303206S
- ISSN
- 0897-4756
- Article Type
- Article
- Citation
- CHEMISTRY OF MATERIALS, vol. 25, no. 2, page. 184 - 189, 2013-01-22
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.