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Nickel-based nanosheets array as a binder free and highly efficient catalyst for electrochemical hydrogen evolution reaction

Faraji, H ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ijhydene.2022.08.070
  3. Publisher: Elsevier Ltd , 2022
  4. Abstract:
  5. Hydrogen technology through water electrolyzer systems has attracted a great attention to overcome the energy crisis. So, rationally designed non-noble metal based-electrocatalysts with high activity and durability can lead to high performance water electrolyzer systems and high purity hydrogen generation. Herein, a facile two-step method: hydrothermal and electrodeposition, respectively, are developed to decorate highly porous three-dimensional binder-free structure NiFeO/NiO nanosheets array on Ni foam (NiFeO/NiO/NF) with robust adhesion as a high-performance electrode for Hydrogen Evolution Reaction (HER). The electrodeposition process applied after the initial hydrothermal process provides a stable structure and, in addition, enhances the sluggish hydrogen evolution efficiency. In alkaline media, the developed electrode needs an overpotential of 48 and 188 mV to drive current densities (j) of 10 and 100 mA cm−2, respectively. After continuous 110 h electrochemical stability test under j = 150 mA cm−2 conditions, demonstrates an excellent stability with ignorable activity decrease. Such superior HER catalytic performance can be derived from the synergistic effect between Ni and Fe atoms, also exposure to a high number of active sites on the nanosheets, and good dynamic with effective electron transport along the nanosheets. The present work provides a promising route for the design and fabrication of cost-effective and highly efficient HER electrocatalysts. © 2022 Hydrogen Energy Publications LLC
  6. Keywords:
  7. Electrocatalysis ; Electrodeposition ; Hydrogen evolution reaction ; Nanosheets array ; NiFeO ; NiO ; Cost effectiveness ; Electrocatalysis ; Electrocatalysts ; Electrodeposition ; Electrodes ; Electrolysis ; Electrolytic cells ; Electron transport properties ; Energy policy ; Hydrogen production ; Iron compounds ; Nanosheets ; Nickel ; Precious metals ; Binder free ; Efficient catalysts ; Electrochemicals ; Energy crisis ; High activity ; Hydrogen evolution reactions ; Hydrogen technologies ; Nanosheet arrays ; Performance ; Water electrolyzer ; Nickel oxide
  8. Source: International Journal of Hydrogen Energy ; Volume 47, Issue 82 , 2022 , Pages 34887-34897 ; 03603199 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0360319922035704