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Metal-Organic framework derived CuCo2O4 as a promising Co-Catalyst for improving electrochemical hydrogen evolution activity of MoS2 nanoflowers

Koohdareh, A.R ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1016/j.cplett.2022.140160
  3. Publisher: Elsevier B.V , 2022
  4. Abstract:
  5. The great promise of electrochemical water splitting for green and sustainable hydrogen fuel production has motivated researchers to strive for more efficient and low-cost catalysts based on non-precious metals. In this study, MoS2 nanoflowers decorated with CuCo2O4 were successfully synthesized, and their catalytic activities toward the electrochemical hydrogen evolution reaction (HER) in an alkaline medium were investigated. The composition, structure, and morphology of the as-synthesized catalysts were explored by various techniques such as FT-IR, XRD, BET, SEM, and TEM. To maximize the catalytic activity, the composition of the nanocomposites was systematically varied. Catalytic results revealed that catalyst with the 90:10 mass ratio of CuCo2O4 to MoS2 (NC-90:10) demonstrated the best HER efficiency, with a measured overpotential of 237 mV (at the current density of 20 mA cm−2) and a Tafel slope of 134 mV dec−1. Furtheremore, NC-90:10 showed graet long-term stability. © 2022 Elsevier B.V
  6. Keywords:
  7. Bimetallic oxides ; Electrocatalyst ; Hydrogen evolution reaction ; Metal-organic frameworks ; MoS2 ; Catalyst activity ; Copper compounds ; Electrocatalysts ; Hydrogen production ; Molybdenum compounds ; Nanocatalysts ; Nanoflowers ; Co catalysts ; Electrochemicals ; Fuel production ; Hydrogen evolution reactions ; Hydrogen-evolution ; Metalorganic frameworks (MOFs) ; Synthesised ; Water splitting ; ]+ catalyst ; Layered semiconductors
  8. Source: Chemical Physics Letters ; Volume 809 , 2022 ; 00092614 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S000926142200817X