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Mesoporous nanostructured composite derived from thermal treatment CoFe prussian blue analogue cages and electrodeposited NiCo-S as an efficient electrocatalyst for an oxygen evolution reaction

Hafezi Kahnamouei, M ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1021/acsami.9b21403
  3. Publisher: American Chemical Society , 2020
  4. Abstract:
  5. Developing effective and priceless electrocatalysts is an indispensable requirement for advancing the efficiency of water splitting to get clean and sustainable fuels. Herein, we reported a feasible strategy for preparing a trimetallic (NiCoFe) superior electrocatalyst with a novel open-cage/3D frame-like structure for an oxygen evolution reaction (OER). It is prepared by consequent thermal treatments of a CoFe Prussian blue analogue frame/cage-like structure under an argon (CoFeA-TT) atmosphere and then electrochemical deposition of nickel-cobalt sulfide nanosheets as a shell layer on it. The electrochemical measurements demonstrated that the deposition of NiCo-S on CoFeA-TT (NiCo-S@CoFeA-TT) has the best catalytic performance and can drive the benchmark current density of 10 mA cm-2 at a low overpotential of 268 mV with a Tafel slope of 62 mV dec-1 and an excellent long-term catalytic stability in an alkaline medium. Its outstanding electrocatalytic performances are endowed from frame/cage-like structures, highly exposed active sites, accelerated mass and electron transport, and the synergistic effect of multiple hybrid components. The NiCo-S@CoFeA-TT showed a better performance than most advanced nonprecious catalysts and the noble commercial RuO2 catalyst. This study exhibited an effective and efficient procedure to design 3D porous architecture catalysts for the energy-relevant electrocatalysis reaction. Copyright © 2020 American Chemical Society
  6. Keywords:
  7. Bimetallic sulfides ; Frame/cage-like architecture ; Benchmarking ; Binary alloys ; Cobalt compounds ; Electrocatalysis ; Electrocatalysts ; Electrochemical deposition ; Electron transport properties ; Heat treatment ; Nickel compounds ; Oxygen ; Reduction ; Ruthenium compounds ; Slope stability ; Sulfur compounds ; Ternary alloys ; Catalytic performance ; Electrocatalytic performance ; Electrochemical measurements ; Nanostructured composites ; Non-precious catalysts ; Oxygen evolution reaction (oer) ; Porous architectures ; Prussian blue analogues ; Oxygen evolution reaction
  8. Source: ACS Applied Materials and Interfaces ; Volume 12, Issue 14 , 2020 , Pages 16250-16263
  9. URL: https://pubs.acs.org/doi/10.1021/acsami.9b21403