Real-Time Modulation of Hydrogen Evolution Activity of Graphene Electrodes Using Mechanical Strain

Kim, Min A.; Sorescu, Dan C.; Amemiya, Shigeru; Jordan, Kenneth D.; Liu, Haitao

doi:10.1021/acsami.1c21821

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Real-Time Modulation of Hydrogen Evolution Activity of Graphene Electrodes Using Mechanical Strain

Kim, Min A.·Sorescu, Dan C.·Amemiya, Shigeru·Jordan, Kenneth D.·Liu, Haitao

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Abstract

This paper reports the effect of mechanically applied elastic strain on the hydrogen evolution reaction (HER) activity of graphene under acidic conditions. Here, applied tensile strain of 0.2% on a graphene electrode is shown to lead to a 1–3% increase of HER current. Tensile strain increases HER activity while compressive strain decreases it. Density functional theory (DFT) calculations using a periodic graphene slab model show increasing in the adsorption energy of H atom with growing tensile strain, leading to a corresponding enhancement of current density in HER, similar to that observed experimentally.

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY density functional theory electrochemistry graphene hydrogen evolution reaction (HER)mechanical strain

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Kim, Min A., Sorescu, Dan C., Amemiya, Shigeru, Jordan, Kenneth D., Liu, Haitao. 2022-02-16. Real-Time Modulation of Hydrogen Evolution Activity of Graphene Electrodes Using Mechanical Strain. https://doi.org/10.1021/acsami.1c21821

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