Alkaline modified bismuth vanadate coupled with reduced graphene oxide as efficient photoelectrochemical catalysts for water oxidation

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Cheng T.-M.; Wang Y.-R.; Chiu Y.-H.; Chung R.-J.; Kongvarhodom C.; Saukani M.; Yougbaré S.; Chen H.-M.; Lin L.-Y.

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2025

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

Volume number: 98

หน้าแรก: 1226

หน้าสุดท้าย: 1234

จำนวนหน้า: 9

นอก: 0360-3199

eISSN: 1879-3487

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85211696903&doi=10.1016%2fj.ijhydene.2024.12.139&partnerID=40&md5=f47eee1bd46079f2a560c6ad3b66316f

ภาษา: English-Great Britain (EN-GB)

ดูบนเว็บไซต์ของสำนักพิมพ์

บทคัดย่อ

Bismuth vanadate (BiVO4) with its appropriately positioned band structures is recognized as an efficient photocatalyst for water oxidation. Enhancing the number of active sites and electrical conductivity is crucial, as these factors can significantly improve charge diffusion lengths and reduce charge recombination rates. In this study, a novel approach is presented by incorporating Ultraphene™, a commercial reduced graphene oxide, into alkaline-etched BiVO4 photoanodes using a hydrothermal process. This innovative method aims to create advanced photocatalysts for water oxidation. Although the BiVO4 treated with alkaline etching and Ultraphene™ (U-BVO-E) exhibits reduced light absorbance, it compensates by generating more defects that serve as hole sinks and establish efficient charge transfer pathways. Notably, the U-BVO-E photoanode achieves a maximum photocurrent density of 5.89 mA/cm2 at 1.23 V versus the reversible hydrogen electrode (VRHE) in an electrolyte without a hole scavenger, a significant improvement compared to the untreated BiVO4 electrode, which only records a photocurrent density of 0.70 mA/cm2. Additionally, the U-BVO-E electrode retains 82% of the photocurrent after 6000 s of continuous illumination. These findings strongly demonstrate the effectiveness of alkaline etching and Ultraphene™ incorporation in significantly enhancing the photoelectrochemical catalytic performance of BiVO4. © 2024

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