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|Title: ||Cobalt-Phosphate-Assisted Photoelectrochemical Water Oxidation by Arrays of Molybdenum-Doped Zinc Oxide Nanorods|
|Authors: ||Yan-Gu Lin;Yu-Kuei Hsu;Ying-Chu Chen;Bing-Wei Lee;Jih-Shang Hwang;Li-Chyong Chen,;Kuei-Hsien Chen|
|Issue Date: ||2017-02-15T02:45:38Z
|Abstract: ||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 mA cm−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 high-efficiency photoelectrodes in the solar-hydrogen field.|
|Appears in Collections:||[光電科學研究所] 期刊論文|
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