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Fabrication of nanostructured Co3O4 with rich nanoscale grain boundary by hide waste for efficiently catalyzing oxygen evolution reaction
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B
马
刘
X
K
DOI：10.1007/s11431-025-3324-5.png)
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Abstract
En 中文
Grain boundaries at junctions between crystals with different symmetry orientations, which alter the electronic structure, significantly affect their intrinsic reactivity. In this study, due to the advantages of rich functional groups and unique pyrolysis behavior, hide waste was utilized as a self-sacrificing template to synthesize nanostructured spinel cobalt oxide/carbon (Co3O4/C) composite with rich nanoscale grain boundary, which efficiently catalyzes oxygen evolution reactions (OER). Herein, rich nanoscale grain boundaries (GB) were introduced in Co3O4 by pyrolyzing the precursors of Co2+/polypeptide hydrogel derived from hide trimmings, significantly boosting intrinsic catalytic activity for OER. Furthermore, the polypeptide provides dual-source elements (C and N) to synthesize N-doped carbon with Co3O4 nanoparticles, resulting in enhanced structural stability. The Co3O4/C composite demonstrated excellent OER activity, requiring an overpotential of only 245 mV to achieve 10 mA cm−2. This research provides a promising method for generating abundant grain boundaries to advance the design of OER electrocatalysts.
Keywords:
oxygen evolution reaction
Co3O4
biomass template
grain boundary engineering
hide waste
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