Chunlan LV

Shanxi University of Traditional Chinese Medicine

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Zhongping Li

Ulsan National Institute of Science and Technology

Lifang Fan

Wannan Medical College

Yong Xiao

South China Agricultural University

Jinfeng Zhi

Shanxi University of Traditional Chinese Medicine

Qiang Wang

Yangzhou University

Hui Bai

Wuhan University of Technology

Huanwen Wang

China University of Geosciences

Yujing Guo

Shanxi University

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Shanxi University

Chinese Academy of Sciences

Shanxi University of Traditional Chinese Medicine

Wuhan University

South China Agricultural University

Wuhan University of Technology

Central South University

Ulsan National Institute of Science and Technology

Northwest Institute of Eco-Environment and Resources

Anhui University

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Mo-Doping And Nife Layered Double Hydroxides Cocatalyst Enhancing the Charge Separation and Transfer Kinetics of Bivo 4 For Solar-Driven Water Oxidation

Lifang Fan Jinfeng Zhi Chunlan LV Qiang Wang Yujing Guo

The PEC water splitting performance of BiVO4 is limited by its low carrier mobility and poor water oxidation kinetics. Through the introduction of a foreign Mo dopant into BiVO4 lattice and combining NiFe layered double hydroxides (NiFe-LDHs) nanosheets as the cocatalyst modified on the surface of BiVO4, the inherent defects of BiVO4 can be effectively solved. Herein, a plain and effective integrated ternary photoanode, NiFe-LDHs/Mo-doped BiVO4 was designed on a fluorine-doped tin oxide (FTO) substrate by a simple two-step electrodeposition method. The PEC activity and the water oxidation performance via Mo-doping and NiFe-LDHs deposition were greatly enhanced. The designed ternary photoanode showed a significant negative shift of onset potential compared to pristine BiVO4 photoanode, and its photocurrent density was approximately 4.5 times higher than that of pure BiVO4. Moreover, its incident photon-to-current efficiency (IPCE) of 3.6% was 5 times compared to pure BiVO4. The improved performance was explored from the effective carrier separation by Mo-doping and accelerated charge transfer efficiency by NiFe-LDHs deposition. This work provides a new insight into the mechanism of high efficiency, low-cost photoanodes and further utilization for environmental practical applications.

Layered double hydroxides

10.2139/ssrn.4680032

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