Cobalt‐Phosphate‐Assisted Photoelectrochemical Water Oxidation by Arrays of Molybdenum‐Doped Zinc Oxide Nanorods. Issue 9 (8th July 2014)

• Record Type: Journal Article
• Authors: Lin, Yan‐Gu; Hsu, Yu‐Kuei; Chen, Ying‐Chu; Lee, Bing‐Wei; Hwang, Jih‐Shang; Chen, Li‐Chyong; Chen, Kuei‐Hsien
• Is Part Of: ChemSusChem. Volume 7:Issue 9(2014:Sep.)
• Page Start: 2748
• Page End: 2754
• Publication Date: 2014-07-08
• Subjects: Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201402025
• Languages: English
• ISSNs: 1864-5631

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>We report the first demonstration of cobalt phosphate (Co‐Pi)‐assisted molybdenum‐doped zinc oxide nanorods (Zn<sub>1−<italic>x</italic></sub>Mo<sub><italic>x</italic></sub>O 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<sup>−2</sup>. 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 Zn<sub>1−<italic>x</italic></sub>Mo<sub><italic>x</italic></sub>O 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 Zn<sub>1−<italic>x</italic></sub>Mo<sub><italic>x</italic></sub>O photoanodes enriches knowledge on doping and advances the development of high‐efficiency photoelectrodes in the solar‐hydrogen field.</p> </abstract>