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Electronic Communication Between Co and Ru Sites Decorated on Nitrogen-doped Carbon Nanotubes Boosting the Alkaline Hydrogen Evolution Reaction

Journal of Electrochemistry, ISSN: 2993-074X, Vol: 30, Issue: 9
2024
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Article Description

Designing highly efficient Pt-free electrocatalysts with low overpotential for an alkaline hydrogen evolution reaction (HER) remains a significant challenge. Here, a novel and efficient cobalt (Co), ruthenium (Ru) bimetallic electrocatalyst composed of CoRu nanoalloy decorated on the N-doped carbon nanotubes (CoRu@N-CNTs), was prepared by reacting fullerenol with melamine via hydrothermal treatment and followed by pyrolysis. Benefiting from the electronic communication between Co and Ru sites, the as-obtained CoRu@N-CNTs catalyst exhibited superior electrocatalytic HER activity. To deliver a current density of 10 mA cm-2, it required an overpotential of merely 19 mV along with a Tafel slope of 26.19 mV dec-1 in 1 mol L-1 potassium hydroxide (KOH) solution, outperforming the benchmark Pt/C catalyst. The present work would pave a new way towards the design and construction of an efficient electrocatalyst for energy storage and conversion.

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