In Situ Growth of BiOI/MoS2 Heterostructure as Pt Supports for Visible Light-Assisted Electrocatalytic Methanol Oxidation Reaction

作者：Zhang, Hongmin; Zhai, Chunyang^*; Yang, Peizhou^*; Yuan, Chen; Fu, Nianqing^*; Zhu, Mingshan

来源：Energy Technology, 2020, 8(1): 1900731.

DOI：10.1002/ente.201900731

• BiOI
• methanol oxidation reaction
• molybdenum disulfide
• photoelectrocatalytic
• visible light

A two-dimensional BiOI/MoS2 heterojunction is fabricated by in situ growth of MoS2 on BiOI nanosheets through a hydrothermal method and then as a carrier for loading on Pt nanoparticles. Transmission electron microscopy shows that Pt nanoparticles are decorated uniformly on the surface of BiOI/MoS2 nanosheets. The obtained Pt-BiOI/MoS2 is utilized as an electrocatalyst for the methanol oxidation reaction in alkaline conditions under visible light irradiation. Electrochemical evaluations indicate that as-prepared Pt-BiOI/MoS2 expresses the highest methanol oxidation reaction activity and stability, and the maximum current density reaches 1007.2 mA mg(Pt)(-1) under visible light irradiation, which is 12 and 3.5 times higher compared with Pt-BiOI and commercial Pt/C electrodes, respectively, in the traditional electrocatalytic process. The results suggest that a synergy of photo- and electro-processes improves the photoelectrocatalytic performance of Pt-BiOI/MoS2 in the methanol oxidation reaction.