Alcohol-Mediated Abandoned Silk Textile Transformation to Self-Support Carbon Frameworks Anchoring with CoSe for Bifunctional Electrocatalytic Water Splitting.

Authors

Lanlan Yang, Taoyi Shen, Xiang Chen, Zhongce Hu, Dan Ge, Rui Zhang, Kaifu Zhang, Houyong Yu

Published in

Langmuir : the ACS journal of surfaces and colloids. Jul 28, 2025. Epub Jul 28, 2025.

Abstract

Developing a self-supported structure with an enriched active site is crucial for enhancing the water splitting performance of transition metal selenide electrocatalysts. Herein, we present a cobalt selenide/waste silk-derived carbon (CoSe/SC) hybrid catalyst synthesized through a synergistic alcohol-mediated solvothermal and controlled pyrolysis strategy. Notably, the incorporation of ethanol transforms silk from a random coil to a highly crystalline β-sheet conformation, which effectively preserves the hierarchical architecture during carbonization. The resulting self-supporting SC matrix demonstrates exceptional electrical conductivity, enabling optimal dispersion and electronic coupling of the CoSe nanoparticles. Electrochemical evaluations reveal the optimized CoSe/SC-2 catalyst achieves overpotentials of 254.4 mV and 278.7 mV to drive 10 mA cm^-2 for the HER and the OER, respectively. Importantly, the formation of Se-C bonds endows a strong coupling between cobalt selenide and waste silk-derived carbon, leading to enhanced stability (130 h) of CoSe/SC-2 in overall water splitting. This work offers valuable insights for designing transition metal selenides supported on regenerated biomass to achieve efficient electrocatalytic water splitting.

PMID:
40720737
Bibliographic data and abstract were imported from PubMed on 29 Jul 2025.

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