Issue 9, 2024

Fabrication of superaerophobic Ru-doped c-CoSe2 for efficient hydrogen production

Abstract

Transition metal dichalcogenides are recognized as promising electrocatalysts for the hydrogen evolution reaction (HER), but their catalytic performances still require further enhancement. Herein, Ru-doped cubic CoSe2 with a leaf-like microarray hollow structure supported on carbon cloth (Ru-c-CoSe2@CC) is rationally fabricated via a strategy involving in situ growth of Co-ZIF, and Ru3+ ion etching and selenization steps. The chemical etching step transforms the precursor sample from Co-ZIF into RuCo-LDH, and the subsequent selenization step leads to crystal phase transformation and Ru-doping of CoSe2 to form Ru-c-CoSe2. Compared with orthorhombic CoSe2 and pristine c-CoSe2, the optimized electrocatalyst Ru-c-CoSe2/CC-3 shows significantly enhanced HER catalytic performance in both acidic and alkaline media. Theoretical investigations demonstrate the charge-transfer redistribution triggered by Ru dopants, optimizing the electronic states of the adjacent Co atoms with boosted intrinsic catalytic activity. Additionally, the leaf-like microarray hollow structure is highly desirable in active site exposure and mass transfer due to its superaerophobic interfacial properties.

Graphical abstract: Fabrication of superaerophobic Ru-doped c-CoSe2 for efficient hydrogen production

Supplementary files

Article information

Article type
Paper
Submitted
29 Nov 2023
Accepted
22 Jan 2024
First published
23 Jan 2024

J. Mater. Chem. A, 2024,12, 5294-5306

Fabrication of superaerophobic Ru-doped c-CoSe2 for efficient hydrogen production

Y. Wei, J. Wang, Y. Shang, C. Lv, X. He, T. Wang, Z. Chen, L. Ji and S. Wang, J. Mater. Chem. A, 2024, 12, 5294 DOI: 10.1039/D3TA07367J

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