Suppressing photoinduced charge recombination at the BiVO4||NiOOH junction by sandwiching an oxygen vacancy layer for efficient photoelectrochemical water oxidation

Peng, Yong, Du, Minshu, Jia, Guohua, Santoso, Shella Permatasari, Peng, Xiang, Niu, Wenxin, Yuan, Mingjuan and Hsu, Hsien-Yi (2022) Suppressing photoinduced charge recombination at the BiVO4||NiOOH junction by sandwiching an oxygen vacancy layer for efficient photoelectrochemical water oxidation. Suppressing photoinduced charge recombination at the BiVO4||NiOOH junction by sandwiching an oxygen vacancy layer for efficient photoelectrochemical water oxidation, 608 (15). pp. 1116-1125. ISSN 00219797, 10957103, Jurnal Internasional Bereputasi SJR(2020): 1.54, Q1, H-Index: 236

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Abstract

Nickel oxyhydroxide (NiOOH) is regarded as one of the promising cocatalysts to enhance the catalytic performance of photoanodes but suffers from serious interfacial charge-carrier recombination at the photoanode|| NiOOH interface. In this work, surface-engineered BiVO4 photoanodes are fabricated by sandwiching an oxygen vacancy (Ovac) interlayer between BiVO4 and NiOOH. The surface Ovac interlayer is introduced on BiVO4 by a chemical reduction treatment using a mild reducing agent, sodium hypophosphite. The induced Ovac can alleviate the interfacial charge-carrier recombination at the BiVO4||NiOOH junction, resulting in efficient charge separation and transfer efficiencies, while an outer NiOOH layer is coated to prevent the Ovac layer from degradation. As a result, the as-prepared NiOOH-P-BiVO4 photoanode exhibits a high photocurrent density of 3.2 mA cm�2 at 1.23 V vs. RHE under the irradiation

Item Type: Article
Additional Information: Jurnal Internasional Bereputasi SJR(2020): 1.54, Q1, H-Index: 236
Uncontrolled Keywords: Photoelectrochemistry Surface engineering Oxygen vacancies
Subjects: Engineering > Chemical Engineering
Divisions: Journal Publication
Depositing User: F.X. Hadi
Date Deposited: 14 Jul 2022 03:40
Last Modified: 03 Aug 2022 01:58
URI: http://repository.ukwms.ac.id/id/eprint/31507

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