Non-noble-metal bismuth nanoparticle-decorated bismuth vanadate nanoarray photoanode for efficient water splitting

作者：Wulan, Ba-Ri; Yi, Sha-Sha; Li, Si-Jia; Duan, Yan-Xin; Yan, Jun-Min^*; Zhang, Xin-Bo; Jiang, Qing

来源：Materials Chemistry Frontiers, 2018, 2(10): 1799-1804.

DOI：10.1039/c8qm00239h

• ENHANCED PHOTOELECTROCHEMICAL PERFORMANCE
• DOPED FE2O3 PHOTOANODE
• BIVO4 PHOTOANODES
• CHARGE-TRANSFER
• HYDROGEN GENERATION
• H-2 EVOLUTION
• OXIDATION
• HETEROJUNCTION
• PHOTOCATALYST
• COCATALYST

Sunlight-driven photoelectrochemical (PEC) water splitting using earth-abundant semiconductor-based materials offers one promising strategy to produce attainable and sustainable carbon free energy. Herein, we demonstrate for the first time that a heterojunction nanostructure of a Bi/BiVO4 photoanode is fabricated by directly coupling semimetal Bi nanoparticles to BiVO4 nanoarrays, showing excellent water oxidation performance. The as-obtained photoanode exhibits a remarkable photocurrent density of 1.96 mA cm(-2) at 1.23 V versus a reversible hydrogen electrode (vs. RHE) under AM 1.5G (100 mW cm(-2)) irradiation, which is approximately 2-fold higher than that of the pristine BiVO4. Based on the detailed analyses of J-V, i-t, M-S and EIS plots, the reason for the high photocurrent density of Bi/BiVO4 can be attributed to the improved charge separation efficiency, the enhanced hole injection efficiency and the suppressed back reaction of water oxidation.

• 出版日期2018-10-1
• 单位吉林大学