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Title: Structurally Deformed MoS 2 for Electrochemically Stable, Thermally Resistant, and Highly Efficient Hydrogen Evolution Reaction

Journal Article · · Advanced Materials
 [1];  [2];  [3];  [2];  [4];  [5];  [3];  [6];  [5];  [4];  [2];  [3]; ORCiD logo [7]
  1. School of Engineering University of California Merced CA 95343 USA, Molecular Foundry Lawrence Berkeley National Lab Berkeley CA 94720 USA
  2. Physical Science and Engineering Division King Abdullah University of Science and Technology Thuwal 23955‐6900 Saudi Arabia
  3. Department of Electronic Optical and Nanomaterials Sandia National Lab Albuquerque NM 87106 USA
  4. Chemical Sciences Division and Joint Center for Artificial Photosynthesis Lawrence Berkeley National Lab Berkeley CA 94720 USA
  5. School of Engineering and Applied Science Yale University New Haven CT 06520 USA
  6. Molecular Foundry Lawrence Berkeley National Lab Berkeley CA 94720 USA
  7. School of Engineering University of California Merced CA 95343 USA

Abstract The emerging molybdenum disulfide (MoS 2 ) offers intriguing possibilities for realizing a transformative new catalyst for driving the hydrogen evolution reaction (HER). However, the trade‐off between catalytic activity and long‐term stability represents a formidable challenge and has not been extensively addressed. This study reports that metastable and temperature‐sensitive chemically exfoliated MoS 2 (ce‐MoS 2 ) can be made into electrochemically stable (5000 cycles), and thermally robust (300 °C) while maintaining synthetic scalability and excellent catalytic activity through physical‐transformation into 3D structurally deformed nanostructures. The dimensional transition enabled by a high throughput electrohydrodynamic process provides highly accessible, and electrochemically active surface area and facilitates efficient transport across various interfaces. Meanwhile, the hierarchically strained morphology is found to improve electronic coupling between active sites and current collecting substrates without the need for selective engineering the electronically heterogeneous interfaces. Specifically, the synergistic combination of high strain load stemmed from capillarity‐induced‐self‐crumpling and sulfur (S) vacancies intrinsic to chemical exfoliation enables simultaneous modulation of active site density and intrinsic HER activity regardless of continuous operation or elevated temperature. These results provide new insights into how catalytic activity, electrochemical‐, and thermal stability can be concurrently enhanced through the physical transformation that is reminiscent of nature, in which properties of biological materials emerge from evolved dimensional transitions.

Sponsoring Organization:
USDOE
Grant/Contract Number:
DE‐AC02‐05CH11231
OSTI ID:
1399178
Journal Information:
Advanced Materials, Journal Name: Advanced Materials Vol. 29 Journal Issue: 44; ISSN 0935-9648
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 72 works
Citation information provided by
Web of Science

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