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Title: Atomically Precise Gold Nanoclusters Accelerate Hydrogen Evolution over MoS 2 Nanosheets: The Dual Interfacial Effect

Journal Article · · Small
 [1];  [1];  [1];  [1];  [2];  [2];  [1]
  1. Department of Chemistry Carnegie Mellon University Pittsburgh PA 15213 USA
  2. Chemical and Petroleum Engineering, and Physics University of Pittsburgh Pittsburgh PA 15261 USA

Abstract Hydrogen generation via electrocatalytic water splitting holds great promise for future energy revolution. It is desirable to design abundant and efficient catalysts and achieve mechanistic understanding of hydrogen evolution reaction (HER). Here, this paper reports a strategy for improving HER performance of molybdenum disulfide (MoS 2 ) via introducing gold nanoclusters as a cocatalyst. Compared to plain MoS 2 nanosheets, the Au 25 (SR) 18 /MoS 2 nanocomposite exhibits enhanced HER activity with a small onset potential of −0.20 V (vs reversible hydrogen electrode) and a higher current density of 59.3 mA cm −2 at the potential of −0.4 V. In addition to the interfacial interaction between nanoclusters and MoS 2 , the interface between the Au 25 core and the surface ligands (thiolate vs selenolate) is also discovered to distinctly affect the catalytic performance. This work highlights the promise of metal nanoclusters in boosting the HER performance via tailoring the interfacial electronic interactions between gold nanoclusters and MoS 2 nanosheets, as well as the interface between metal core and surface ligands.

Sponsoring Organization:
USDOE
Grant/Contract Number:
DE FG02‐03ER15476
OSTI ID:
1401309
Journal Information:
Small, Journal Name: Small Vol. 13 Journal Issue: 43; ISSN 1613-6810
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 70 works
Citation information provided by
Web of Science

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