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- Title
Cobalt-Phosphate-Assisted Photoelectrochemical Water Oxidation by Arrays of Molybdenum-Doped Zinc Oxide Nanorods.
- Authors
Lin, Yan‐Gu; Hsu, Yu‐Kuei; Chen, Ying‐Chu; Lee, Bing‐Wei; Hwang, Jih‐Shang; Chen, Li‐Chyong; Chen, Kuei‐Hsien
- Abstract
We report the first demonstration of cobalt phosphate (Co-Pi)- assisted molybdenum-doped zinc oxide nanorods (Zn1-xMoxO NRs) as visible-light-sensitive photofunctional electrodes to fundamentally improve the performance of ZnO NRs for photoelectrochemical (PEC) water splitting. A maximum photoconversion efficiency as high as 1.05% was achieved, at a photocurrent density of 1.4 mAcm-2. More importantly, in addition to achieve the maximum incident photon to current conversion efficiency (IPCE) value of 86%, it could be noted that the IPCE of Zn1-xMoxO photoanodes under monochromatic illumination (450 nm) is up to 12%. Our PEC performances are comparable to those of many oxide-based photoanodes in recent reports. The improvement in photoactivity of PEC water splitting may be attributed to the enhanced visible-light absorption, increased charge-carrier densities, and improved interfacial charge-transfer kinetics due to the combined effect of molybdenum incorporation and Co-Pi modification, contributing to photocatalysis. The new design of constructing highly photoactive Co-Pi-assisted Zn1-xMoxO photoanodes enriches knowledge on doping and advances the development of highefficiency photoelectrodes in the solar-hydrogen field.
- Subjects
NANORODS; NANOSTRUCTURED materials; MOLYBDENUM; PHOTOELECTROCHEMISTRY; ZINC oxide
- Publication
ChemSusChem, 2014, Vol 7, Issue 9, p2748
- ISSN
1864-5631
- Publication type
Article
- DOI
10.1002/cssc.201402025