Strategic integration of nickel tellurium oxide and cobalt iron prussian blue analogue into bismuth vanadate for enhanced photoelectrochemical water oxidation

Journal article

Authors/Editors

Strategic Research Themes

Publication Details

Author list: Chiu Y.-H.; Kongvarhodom C.; Saukani M.; Yougbaré S.; Chen H.-M.; Wu Y.-F.; Lin L.-Y.

Publisher: Elsevier

Publication year: 2024

Journal: International Journal of Hydrogen Energy (0360-3199)

Volume number: 89

Start page: 142

End page: 150

Number of pages: 9

ISSN: 0360-3199

eISSN: 1879-3487

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85204785852&doi=10.1016%2fj.ijhydene.2024.09.309&partnerID=40&md5=fd4cd859ecfbf5eeefcc0b1fce4f8063

Languages: English-Great Britain (EN-GB)

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Abstract

Bismuth vanadate (BVO) with a small band gap and suitable band edges is regarded as one of the promising photocatalysts for water oxidation. However, the short charge-transfer path limits its photocatalytic performance. Establishing a heterojunction and incorporating a co-catalyst are feasible methods to improve the photocatalytic ability of BVO by enhancing carrier transfer rates and reducing in-electrode resistances. In this study, nickel tellurium oxide (NTO) and cobalt iron Prussian blue analogues (CoFePBA) are incorporated into the BVO electrode to respectively develop a heterojunction and decorate co-catalyst for efficiently catalyzing the water oxidation reaction for the first time. Different amounts of CoFePBA are deposited on the NTO/BVO electrode by varying the electrodeposition durations to enhance exited charge generations and maintain high absorbance of incident light. The largest photocurrent density of 6.55 mA/cm2 at 1.23 V versus reversible hydrogen electrode is attained for the optimal CoFePBA/NTO/BVO electrode prepared using an electrodeposition duration of 2 min. Excellent catalytic stability is also achieved, with the photocurrent retention of 91.9% after illuminating the electrode for 5000 s. This study provides blueprints for incorporating novel electrochemically active materials in the BVO system to realize heterojunction and co-catalyst strategies, thereby attaining excellent photocatalytic ability toward water oxidation. © 2024 Hydrogen Energy Publications LLC

Keywords

Bismuth vanadate, Cobalt iron prussian blue analogues, Co-catalyst, Nickel tellurium oxide, Water oxidation