@article{Shi:2023:10.1038/s41586-023-06339-3,
author = {Shi, Z and Zhang, X and Lin, X and Liu, G and Ling, C and Xi, S and Chen, B and Ge, Y and Tan, C and Lai, Z and Huang, Z and Ruan, X and Zhai, L and Li, L and Li, Z and Wang, X and Nam, G-H and Liu, J and He, Q and Guan, Z and Wang, J and Lee, C-S and Kucernak, ARJ and Zhang, H},
doi = {10.1038/s41586-023-06339-3},
journal = {Nature},
pages = {300--305},
title = {Phase-dependent growth of Pt on MoS2 for highly efficient H2 evolution},
url = {http://dx.doi.org/10.1038/s41586-023-06339-3},
volume = {621},
year = {2023}
}

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TY  - JOUR
AB  - Crystal phase is a key factor determining the properties, and hence functions, of two-dimensional transition-metal dichalcogenides (TMDs)1,2. The TMD materials, explored for diverse applications3-8, commonly serve as templates for constructing nanomaterials3,9 and supported metal catalysts4,6-8. However, how the TMD crystal phase affects the growth of the secondary material is poorly understood, although relevant, particularly for catalyst development. In the case of Pt nanoparticles on two-dimensional MoS2 nanosheets used as electrocatalysts for the hydrogen evolution reaction7, only about two thirds of Pt nanoparticles were epitaxially grown on the MoS2 template composed of the metallic/semimetallic 1T/1T' phase but with thermodynamically stable and poorly conducting 2H phase mixed in. Here we report the production of MoS2 nanosheets with high phase purity and show that the 2H-phase templates facilitate the epitaxial growth of Pt nanoparticles, whereas the 1T' phase supports single-atomically dispersed Pt (s-Pt) atoms with Pt loading up to 10 wt%. We find that the Pt atoms in this s-Pt/1T'-MoS2 system occupy three distinct sites, with density functional theory calculations indicating for Pt atoms located atop of Mo atoms a hydrogen adsorption free energy of close to zero. This probably contributes to efficient electrocatalytic H2 evolution in acidic media, where we measure for s-Pt/1T'-MoS2 a mass activity of 85 ± 23 A [Formula: see text] at the overpotential of -50 mV and a mass-normalized exchange current density of 127 A [Formula: see text] and we see stable performance in an H-type cell and prototype proton exchange membrane electrolyser operated at room temperature. Although phase stability limitations prevent operation at high temperatures, we anticipate that 1T'-TMDs will also be effective supports for other catalysts targeting other important reactions.
AU  - Shi,Z
AU  - Zhang,X
AU  - Lin,X
AU  - Liu,G
AU  - Ling,C
AU  - Xi,S
AU  - Chen,B
AU  - Ge,Y
AU  - Tan,C
AU  - Lai,Z
AU  - Huang,Z
AU  - Ruan,X
AU  - Zhai,L
AU  - Li,L
AU  - Li,Z
AU  - Wang,X
AU  - Nam,G-H
AU  - Liu,J
AU  - He,Q
AU  - Guan,Z
AU  - Wang,J
AU  - Lee,C-S
AU  - Kucernak,ARJ
AU  - Zhang,H
DO  - 10.1038/s41586-023-06339-3
EP  - 305
PY  - 2023///
SN  - 0028-0836
SP  - 300
TI  - Phase-dependent growth of Pt on MoS2 for highly efficient H2 evolution
T2  - Nature
UR  - http://dx.doi.org/10.1038/s41586-023-06339-3
UR  - https://www.ncbi.nlm.nih.gov/pubmed/37704763
UR  - http://hdl.handle.net/10044/1/106738
VL  - 621
ER  - 

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