Nanoscale Assembly of BiVO4/CdS/CoOx Core-Shell Heterojunction for Enhanced Photoelectrochemical Water Splitting

被引：8

作者：

Kmentova, Hana ^{[1
]}

Henrotte, Olivier ^{[1
]}

Yalavarthi, Rambabu ^{[1
]}

Haensch, Mareike ^{[2
]}

Heinemann, Christian ^{[2
]}

Zboril, Radek ^{[1
,3
]}

Schmuki, Patrik ^{[1
,4
]}

Kment, Stepan ^{[1
,3
]}

Naldoni, Alberto ^{[1
,5
]}

机构：

[1] Palacky Univ Olomouc, Reg Ctr Adv Technol & Mat, Czech Adv Technol & Res Inst, Krizkovskeho 511-8, Olomouc 77900, Czech Republic

[2] HEKA Elekt GmbH, Wiesenstr 55, D-67466 Lambrecht, Germany

[3] VSB Tech Univ Ostrava, Nanotechnol Ctr, Ctr Energy & Environm Technol, CEET, 17 Listopadu 2172-15, Ostrava 70800, Czech Republic

[4] Univ Erlangen Nurnberg, Dept Mat Sci & Engn, Martensstr 7, D-91058 Erlangen, Germany

[5] Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 610054, Peoples R China

来源：

CATALYSTS | 2021年 / 11卷 / 06期

关键词：

photoelectrocatalysis; water splitting; BiVO4; clean energy; visible light; PULSED-LASER DEPOSITION; Z-SCHEME PHOTOCATALYST; BIVO4; PHOTOANODES; HYDROGEN-PRODUCTION; VISIBLE-LIGHT; SOLAR; H-2; ELECTRODES; SEPARATION; EVOLUTION;

D O I：

10.3390/catal11060682

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Porous BiVO4 electrodes were conformally decorated with CdS via a chemical bath deposition process. The highest photocurrent at 1.1 V vs. RHE was achieved for a BiVO4/CdS composite (4.54 mA cm(-2)), compared with CdS (1.19 mA cm(-2)) and bare BiVO4 (2.1 mA cm(-2)), under AM 1.5G illumination. This improvement in the photoefficiency can be ascribed to both the enhanced optical absorption properties and the charge separation due to the heterojunction formation between BiVO4 and CdS. Furthermore, the BiVO4/CdS photoanode was protected with a CoOx layer to substantially increase the photostability of the material. The new BiVO4/CdS/CoOx nanostructure exhibited a highly stable photocurrent density of similar to 5 mA cm(-2). The capability to produce O-2 was locally investigated by scanning photoelectrochemical microscope, which showed a good agreement between photocurrent and O-2 reduction current maps. This work develops an efficient route to improve the photo-electrochemical performance of BiVO4 and its long-term stability.

引用

页数：17

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