5/6/2023 0 Comments Cobalt kineticsCurrent progress of metal sulfides derived from metal-organic frameworks for advanced electrocatalysis: Potential electrocatalysts with diverse applications. Iridium-incorporated cobalt nanofibers as efficient and robust bifunctional catalysts for high-performance water electrolysis. Synthesis of hierarchical nickel sulfide nanotubes for highly efficient electrocatalytic urea oxidation. First-row transition metal-based materials derived from bimetallic metal-organic frameworks as highly efficient electrocatalysts for electrochemical water splitting. Integrated transition metal and compounds with carbon nanomaterials for electrochemical water splitting. Recent advances in complex hollow electrocatalysts for water splitting. Conducting polymers-derived fascinating elec-trocatalysts for advanced hydrogen and oxygen electrocatalysis. Electrocatalytic activity on single atoms catalysts: Synthesis strategies, characterization, classification, and energy conversion applications. Matthews T, Mashola TA, Adegoke KA, et al. Synthetic strategies to enhance the electrocatalytic properties of branched metal nanoparticles. Poerwoprajitno AR, Cheong S, Gloag L, et al. Thus, this work demonstrates a facile and efficient approach to fabricate non-noble metal-based catalysts with superior electrocatalytic performance for practical energy conversion and storage. The remarkable OER performance of the catalyst benefits from the distinct hierarchical heterostructure with Co-C nanofibers core and amorphous NiFeS nanosheets sheath and the generated highly conductive fibrous carbon substrate, endowing it with a large number of exposed active sites, great electrical conductivity and impregnable structural stability. As a bifunctional electrocatalyst, the Co-C/NiFeS‖Co-C/NiFeS electrolyzer can be assembled, exhibiting outstanding long-term stability of 70 h, which significantly outperforms that of the Pt/C‖RuO 2 electrolyzer. Moreover, an alkaline Pt/C‖Co-C/NiFeS electrolyzer constructed with Co-C/NiFeS nanofibers as the anode and commercial Pt/C as the cathode achieves a low cell voltage of 1.48 V at 10 mA cm −2, which is superior to those of the benchmark Pt/C‖RuO 2 cell and many other reported electrolyzers. The optimized catalyst possesses a superior OER activity with a low overpotential of 233 mV at 10 mA cm −2 and a Tafel slope of 53.1 mV dec −1 in 1 mol L −1 KOH solution, together with a favorable hydrogen evolution reaction activity. In this work, amorphous NiFeS nanosheets supported on carbon nanofibers embedded with cobalt nanoparticles (Co-C/NiFeS nanofibers) catalysts are fabricated via the electro-spinning-carbonization-electrodeposition strategy. The design of a hierarchical heterostructure as a cost-effective and high-efficiency catalyst to realize electronic and interfacial engineering for the oxygen evolution reaction (OER) is a meaningful option in energy storage and conversion.
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