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276 results on '"Luo, Ruixian"'

6. Facile one-step synthesis of a WO3/ZnWO4 heterojunction modified using ZnFe LDH enhances the PEC water splitting efficiency.

Author

Liu, ZiYang, Jia, Shiyu, Hu, Yiwen, Fang, Yanling, Feng, Yongjun, Li, Dianqing, Bai, Shouli, Luo, Ruixian, and Chen, Aifan

Subjects
GREEN fuels, CLEAN energy, ENERGY shortages, OXIDATION of water, SOLAR energy
Abstract

Photoelectrochemical water splitting represents a promising approach for directly converting solar energy into green hydrogen, offering a potential solution to the challenges of energy shortages and environmental pollution. In this work, a WO3/ZnWO4 binary heterojunction was synthesised by a simple and effective one-step drop casting method to enhance the charge separation efficiency; ZnFe LDH was deposited on the surface of the heterojunction with the aim of accelerating water oxidation and synergising with the heterojunction to enhance the photoelectrochemical performance of the photoanode. The photocurrent density of the WO3/ZnWO4/ZnFe LDH electrode can reach 2.1 mA cm−2 at 1.23 V (vs. RHE). This value is approximately 4 times greater than that observed for pure WO3 (0.53 mA cm−2). The IPCE and ABPE were able to improve by 3.1 times and 6 times, respectively. [ABSTRACT FROM AUTHOR]

Published
2024
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41. NiFePB-modified ZnO/BiVO4 photoanode for PEC water oxidation.

Author

Bai, Shouli, Jia, Shiyu, Zhao, Yingying, Feng, Yongjun, Luo, Ruixian, Li, Dianqing, and Chen, Aifan

Subjects
OXIDATION of water, OXYGEN evolution reactions, CHEMICAL energy, OXIDATION kinetics, WATER efficiency, SOLAR cells, DYE-sensitized solar cells
Abstract

Photoelectrochemical (PEC) water splitting has been recognized as the most promising approach for directly converting solar energy into chemical energy, and substantial efforts have been made to develop a highly efficient and low-cost photoanode for enhancement of PEC water splitting efficiency due to sluggish water oxidation reaction kinetics. A ternary NiFePB-modified ZnO/BiVO4 heterojunction photoanode was simply assembled by low-temperature hydrothermal, metal–organic decomposition and electrodeposition methods to improve the water splitting efficiency; its photocurrent density for water oxidation reached 1.66 mA cm−2 at 1.23 V (vs. RHE); in comparison, that of ZnO is only 0.4 mA cm−2. The onset potential manifests a cathodic shift of ∼283 mV compared to ZnO. The IPCE and the ABPE respectively are 3.1 and 6.4 times those of ZnO, respectively. This improvement is ascribed to the efficient separation of photogenerated electrons and holes by the formation of a heterojunction between ZnO and BiVO4 and the enhancement in the oxygen evolution reaction kinetics by the decoration of the co-catalyst NiFePB as a hole acceptor. [ABSTRACT FROM AUTHOR]

Published
2023
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