title: CO₂-Induced Phase Engineering: Protocol for Enhanced Photoelectrocatalytic Performance of 2D MoS₂ Nanosheets.
abstract: Molybdenum disulfide (MoS2) is a promising non-precious-metal catalyst, but its performance is limited by the density of active sites and poor electrical transport. Its metallic 1T phase possesses higher photoelectrocatalytic activity. Thus, how to efficiently increase the concentration of the 1T phase in the exfoliated two-dimensiaonal (2D) MoS2 nanosheets is an important premise. In this work, we propose a strategy to prepare a 2D heterostructure of MoS2 nanosheets using supercritical CO2-induced phase engineering to form metallic 1T-MoS2. Theoretical calculations and experimental results demonstrate that the introduced CO2 in the 2H-MoS2 host can prompt the transformation of partial 2H-MoS2 lattices into 1T-MoS2. Moreover, the electrical coupling and synergistic effect between 2H and 1T phases can greatly facilitate the efficient electron transfer from the active sites of MoS2, which significantly improves the photocatalytic performance.
authors: College of Materials Science and Engineering, Zhengzhou University , Zhengzhou 450052, China.
authors: Yuhang
authors: Y
authors: Qi
authors: College of Materials Science and Engineering, Zhengzhou University , Zhengzhou 450052, China.
authors: Qun
authors: Q
authors: Xu
authors: Centre for Clean Environment and Energy and Griffith School of Environment, Griffith University , Nathan, QLD 4111, Australia.
authors: Yun
authors: Y
authors: Wang
authors: College of Materials Science and Engineering, Zhengzhou University , Zhengzhou 450052, China.
authors: Bo
authors: B
authors: Yan
authors: College of Materials Science and Engineering, Zhengzhou University , Zhengzhou 450052, China.
authors: Yumei
authors: Y
authors: Ren
authors: College of Materials Science and Engineering, Zhengzhou University , Zhengzhou 450052, China.
authors: Zhimin
authors: Z
authors: Chen
keywords: heterostructure; molybdenum disulfide; phase engineering; photoelectrocatalysis; supercritical CO2