Fabrication of dispersive α-Co(OH)2 nanosheets on graphene nanoribbons for boosting their oxygen evolution performance
Source abstract
Abstract
Nanostructured α-Co(OH)2 materials are promising noble-metal-free electrocatalysts for oxygen evolution reaction (OER), but their performance is severally restrained by their poor conductivity. Combination of α-Co(OH)2 and carbon nanotubes (CNTs) can improve their conductivity, but it is difficult to build sufficient interface contact between them due to the mismatched hydrophobicity. Herein, we demonstrate a facile method to in situ grow α-Co(OH)2 nanosheets (NSs) on graphene nanoribbons (GNRs), an intriguing belt-like conductive material after oxidative unzipping of CNTs. Owing to the rich of functional groups, the GNRs can be utilized as substrate in solution to prepare dispersive α-Co(OH)2 nanosheets on their surface. The developed α-Co(OH)2 NSs are well contact with the conductive GNRs substrate and offer sufficient active surface area, showing obviously better OER performance than the α-Co(OH)2 and CNTs/Co(OH)2 prepared under the same condition. The composite electrocatalysts have been characterized by various apparatuses, and their OER activities are explored in detail.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Electrochemical Analysis and Applications · Advanced battery technologies research
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References (45)
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