Chemical vapor deposition of amorphous molybdenum sulphide on black phosphorus for photoelectrochemical water splitting

Yuanmei Xu^1,2,3，Xiaoqin Zhang²，Zhihong Chen⁴，Krzysztof Kempa^1,5，Xin Wang^1,2，Lingling Shui^1,2

1. International Academy of Optoelectronics at Zhaoqing, South China Normal University2. Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University3. State Key Lab of Silicon Materials, Zhejiang University4. Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay, Guangzhou University5. Department of Physics, Boston College

摘 要：Non-precious metal electrocatalyst molybdenum sulphide（MoS） and black phosphorus（BP） are highly promising catalysts for H₂ evolution reaction（HER）.However,BP is environmentally unstable and the basal planes of crystal MoS₂ are inactive toward HER.Herein,amorphous molybdenum sulphide（MoS_x）directly on BP/BiVO₄ film dramatically improves the performance of photoelectrochemical water splitting compared with pure BiVO₄.Additionally,we demonstrate that a BP layer,inserted between the MoS_x and BiVO₄,can enhance the photoelectrochemical performance and improve the stability of the electrodes.Finally,MoS_x/B P/BVO electrode shows the excellent current density of 2.1 mA/cm² at the potential of 1.2 V（vs Ag/AgCl）,which is twice higher than that of pure BVO electrode.Our novel nanostructure materials will lead to a new class of non-precious metal photocatalysts for hydrogen production.

关键词：