Publication

Highly enhancing photoelectrochemical performance of facilely-fabricated Bi-induced (002)-oriented WO3 film with intermittent short-time negative polarization

조회수 : 2335 등록일 : 2018.07.12 00:00

저자 : Zheng, JY (Zheng, Jin You); Kang, YS (Kang, Young Soo)
출처 : APPLIED CATALYSIS B-ENVIRONMENTAL
출판일 : 2018.10.05


Highly enhancing photoelectrochemical performance of facilely-fabricated Bi-induced (002)-oriented WO3 film with intermittent short-time negative polarization


Zheng, JY (Zheng, Jin You)1 ] Pawar, AU (Pawar, Amol Uttam)1 ] Kim, CW (Kim, Chang Woo)1,2 ] Kim, YJ (Kim, Yong Joo)3 ] Kang, YS (Kang, Young Soo)1 ]


[ 1 ] Sogang Univ, Dept Chem, KCAP, Seoul 121742, South Korea 
[ 2 ] Pukyong Natl Univ, Coll Engn, Dept Graph Arts Informat Engn, 365 Sinseon Ro, Busan 98547, South Korea
[ 3 ] Hanbat Natl Univ, Dept Che



WO3 photoelectrode should have high photoactivity and stability for application in solar water splitting. By introducing Bi3+ ions, a highly ordered (002)-oriented WO3 film with a high photocurrent was easily prepared on FTO glass by spin coating a simple Bi-doped peroxotungstic acid (PTA) gel followed by calcination. In situ XRD, pole figures, and HR-TEM were performed to elucidate the formation process and epitaxial properties. The flat Bi-WO3 film achieved a remarkable photocurrent density of 2.06 mA cm(-2) at 1.5 V vs. Ag/AgCI. By introducing intermittent short-time negative polarization (ISNP) into the process of PEC water splitting, the 03 gas product yield is enhanced by ca. 75% with high faradaic efficiency, as ISNP can efficiently eliminate peroxo species on the surface of the WO3 film. This demonstrates that ISNP can enhance the photostability and phoinactivity of WO3 films.






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