FeNi@N-doped Graphene Core-Shell Nanoparticles on Carbon Matrix Coupled with MoS2 Nanosheets as a Competent Electrocatalysts for Efficient Hydrogen Evolution Reaction

Shah, SA; Xu, L; Sayyar, R; et al.Khan, I; Yuan, A; Shen, X; Li, X; Ullah, H
Date: 11 July 2022
Journal
Advanced Materials Interfaces
Publisher
Wiley
Publisher DOI
https://doi.org/10.1002/admi.202201040
Abstract
Synthesis of noble-metal-free electrocatalysts for green hydrogen production is crucial to overcoming the energy demand of modern society. One of the most competitive and alternative noble-metal-free electrocatalysts for HER is Molybdenum disulfide (MoS2) based composites. Herein, MoS2 nanosheets grow on FeNi@N-doped graphene ...
Synthesis of noble-metal-free electrocatalysts for green hydrogen production is crucial to overcoming the energy demand of modern society. One of the most competitive and alternative noble-metal-free electrocatalysts for HER is Molybdenum disulfide (MoS2) based composites. Herein, MoS2 nanosheets grow on FeNi@N-doped graphene nanoparticles/N-doped carbon matrix (FeNi@NG/NCM@MoS2), using the hydrothermal method. FeNi@NG/NCM@MoS2 hybrid displays outstanding HER performance with a low overpotential of 79 mV at 10 mA cm-2, a small Tafel slope of 40.2 mV dec-1, and high durability. First-principles density functional theory (DFT) simulations confirm the electron transformation from FeNi alloy to NG surface of FeNi@NG particle and subsequently further transfer to MoS2 nanosheets which decrease the Gibbs free energy (ΔGH* ≈ -0.08 eV) and local work function for enhanced HER activities. Our work highlights the understanding of electron transfer in demonstrating the kinetic reaction of the HER process and offers a new avenue for constructing efficient MoS2-based electrocatalysts.
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Engineering

Faculty of Environment, Science and Economy

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© 2022 The Authors. Advanced Materials Interfaces published by WileyVCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Except where otherwise noted, this item's licence is described as © 2022 The Authors. Advanced Materials Interfaces published by WileyVCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.