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Title: Understanding catalysis in a multiphasic two-dimensional transition metal dichalcogenide.

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms9311· OSTI ID:1236234
 [1];  [2];  [1];  [1];  [1];  [3];  [1];  [4];  [4]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Univ. of Texas, Austin, TX (United States)
  3. Univ. of New Mexico, Albuquerque, NM (United States)
  4. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Univ. of New Mexico, Albuquerque, NM (United States)

Establishing processing–structure–property relationships for monolayer materials is crucial for a range of applications spanning optics, catalysis, electronics and energy. Presently, for molybdenum disulfide, a promising catalyst for artificial photosynthesis, considerable debate surrounds the structure/property relationships of its various allotropes. Here we unambiguously solve the structure of molybdenum disulfide monolayers using high-resolution transmission electron microscopy supported by density functional theory and show lithium intercalation to direct a preferential transformation of the basal plane from 2H (trigonal prismatic) to 1T' (clustered Mo). These changes alter the energetics of molybdenum disulfide interactions with hydrogen (ΔGH), and, with respect to catalysis, the 1T' transformation renders the normally inert basal plane amenable towards hydrogen adsorption and hydrogen evolution. Furthermore, we show basal plane activation of 1T' molybdenum disulfide and a lowering of ΔGH from +1.6 eV for 2H to +0.18 eV for 1T', comparable to 2H molybdenum disulfide edges on Au(111), one of the most active hydrogen evolution catalysts known.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1236234
Report Number(s):
SAND-2015-5948J; 618380
Journal Information:
Nature Communications, Vol. 6, Issue 10; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 223 works
Citation information provided by
Web of Science

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Recent Strategies for Improving the Catalytic Activity of 2D TMD Nanosheets Toward the Hydrogen Evolution Reaction journal February 2016
Vacancy-Driven Gelation Using Defect-Rich Nanoassemblies of 2D Transition Metal Dichalcogenides and Polymeric Binder for Biomedical Applications journal July 2017
Structurally Deformed MoS 2 for Electrochemically Stable, Thermally Resistant, and Highly Efficient Hydrogen Evolution Reaction journal October 2017
Differentiating Polymorphs in Molybdenum Disulfide via Electron Microscopy journal August 2018
Structural‐Phase Catalytic Redox Reactions in Energy and Environmental Applications journal January 2020
Theoretical Analysis of Surface Active Sites in Defective 2H and 1T′ MoS 2 Polymorphs for Hydrogen Evolution Reaction: Quantifying the Total Activity of Point Defects journal January 2020
Stimulated Electrocatalytic Hydrogen Evolution Activity of MOF‐Derived MoS 2 Basal Domains via Charge Injection through Surface Functionalization and Heteroatom Doping journal May 2019
Macroscale Superlubricity Enabled by Graphene‐Coated Surfaces journal January 2020
Transition Metal Disulfides as Noble-Metal-Alternative Co-Catalysts for Solar Hydrogen Production journal March 2016
Recent Development of Metallic (1T) Phase of Molybdenum Disulfide for Energy Conversion and Storage journal March 2018
Atomic‐Scale Visualization of Electrochemical Lithiation Processes in Monolayer MoS 2 by Cryogenic Electron Microscopy journal October 2019
Solution-Processed Two-Dimensional MoS 2 Nanosheets: Preparation, Hybridization, and Applications journal June 2016
Structure Re-determination and Superconductivity Observation of Bulk 1T MoS 2 journal January 2018
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Recent progress in MoS2 for solar energy conversion applications journal May 2019
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