Abstract
Effective oxygen reduction/evolution nanoporous cobalt–nitrogen–carbon based catalysts are developed from rationally designed single-precursor CoxZn100−x–ZIF-8 with controlled graphitization.
Highlights
View Article OnlineSolely by switching the graphitization conditions of self-modulated cobalt– nitrogen–carbon system (SCNCS), excellent ORR or OER performance is realized
We report a purposely designed route for the synthesis of a promising carbon-based electrocatalyst for both ORR and OER from zeolitic imidazolate frameworks (ZIFs)
The advantage of this approach is that functional and conducting nanoporous carbons (NPCs) can be developed from rationally designed metal–organic frameworks (MOFs), e.g. MOF-5 and ZIF-8.30,31 Imidazolate (H3C3N2) ligand based ZIFs, a sub family of MOFs with zeolitic structure, deserve a special mention
Summary
Solely by switching the graphitization conditions of SCNCS, excellent ORR or OER performance is realized This approach opens up a simple protocol for simultaneous optimization of nitrogen doping and graphitization at controlled cobalt concentrations, and provide a facile method of developing such active catalysts without the use of extensive synthesis procedures. Increasing accessible porosity (specific surface area (SSA), pore-size distribution (PSD) and pore volume (Vp)) of the NPCs facilitates fast mass or charge-carrier transfer. These properties can be enhanced with the selection of appropriate
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