journal article·2019-07-12Open access

Unraveling the Role of Lithium in Enhancing the Hydrogen Evolution Activity of MoS2: Intercalation versus Adsorption

Longfei Wu, Nelson Y. Dzade, Miao Yu, Brahim Mezari, Arno J. F. van Hoof, Heiner Friedrich, Nora H. de Leeuw, Emiel J. M. Hensen, Jan P. Hofmann

ACS Energy Letters· Volume 4· Issue 7

Abstract

Molybdenum disulfide (MoS2) is a highly promising catalyst for the hydrogen evolution reaction (HER) to realize large-scale artificial photosynthesis. The metallic 1T'-MoS2 phase, which is stabilized via the adsorption or intercalation of small molecules or cations such as Li, shows exceptionally high HER activity, comparable to that of noble metals, but the effect of cation adsorption on HER performance has not yet been resolved. Here we investigate in detail the effect of Li adsorption and intercalation on the proton reduction properties of MoS2. By combining spectroscopy methods (infrared of adsorbed NO, 7Li solid-state nuclear magnetic resonance, and X-ray photoemission and absorption) with catalytic activity measurements and theoretical modeling, we infer that the enhanced HER performance of Li x MoS2 is predominantly due to the catalytic promotion of edge sites by Li.
Source: europepmc · Quality: candidate unverified · Source record ↗

Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · MXene and MAX Phase Materials · 2D Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Laboratory for Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands

Faculty of Geosciences, Utrecht University, Princetonlaan 8A, 3584 CB Utrecht, The Netherlands

School of Chemistry, Cardiff University, Main Building, Park Place, CF10 3AT Cardiff, United Kingdom

Laboratory of Materials and Interface Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands

Funding

Engineering and Physical Sciences Research Council · Nederlandse Organisatie voor Wetenschappelijk Onderzoek · Shell Global Solutions International B.V.

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