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

doi:10.1021/acsenergylett.9b00945

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^*

^*Corresponding author for this work

Eindhoven University of Technology

Research output: Contribution to journal › Article › Academic › peer-review

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_xMoS₂ is predominantly due to the catalytic promotion of edge sites by Li.

Original language	English
Pages (from-to)	1733-1740
Number of pages	8
Journal	ACS Energy Letters
Volume	4
Issue number	7
DOIs	https://doi.org/10.1021/acsenergylett.9b00945
Publication status	Published - 27 Jun 2019

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title = "Unraveling the Role of Lithium in Enhancing the Hydrogen Evolution Activity of MoS2: Intercalation versus Adsorption",

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 LixMoS2 is predominantly due to the catalytic promotion of edge sites by Li.",

author = "Longfei Wu and Dzade, {Nelson Y.} and Miao Yu and Brahim Mezari and {Van Hoof}, {Arno J.F.} and Heiner Friedrich and {De Leeuw}, {Nora H.} and Hensen, {Emiel J.M.} and Hofmann, {Jan P.}",

year = "2019",

month = jun,

day = "27",

doi = "10.1021/acsenergylett.9b00945",

language = "English",

volume = "4",

pages = "1733--1740",

journal = "ACS Energy Letters",

issn = "2380-8195",

publisher = "American Chemical Society",

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TY - JOUR

T1 - Unraveling the Role of Lithium in Enhancing the Hydrogen Evolution Activity of MoS2

T2 - Intercalation versus Adsorption

AU - Wu, Longfei

AU - Dzade, Nelson Y.

AU - Yu, Miao

AU - Mezari, Brahim

AU - Van Hoof, Arno J.F.

AU - Friedrich, Heiner

AU - De Leeuw, Nora H.

AU - Hensen, Emiel J.M.

AU - Hofmann, Jan P.

PY - 2019/6/27

Y1 - 2019/6/27

N2 - 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 LixMoS2 is predominantly due to the catalytic promotion of edge sites by Li.

AB - 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 LixMoS2 is predominantly due to the catalytic promotion of edge sites by Li.

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DO - 10.1021/acsenergylett.9b00945

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SP - 1733

EP - 1740

JO - ACS Energy Letters

JF - ACS Energy Letters

IS - 7

ER -

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

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