S, N Co-Doped Rod-Like Porous Carbon Derived from S, N Organic Ligand Assembled Ni-MOF As an Efficient Electrocatalyst for Oxygen Reduction Reaction
Journal of solid state chemistry(2019)
摘要
Efficient catalyst for the oxygen reduction reaction (ORR) is of significance in the development of fuel cell and metal-air battery technologies. Heteroatom doped carbon materials have been considered as one of most promising alternatives to Pt-based catalysts. In this work, we exploit a nitrogen and sulfur dual-doped one-dimensional carbon rod catalyst with porous graphene-like layers on the surface derived from a Ni based metal-organic framework (MOF). The Ni-NSPC-6 catalyst with uniform distribution of N and S atoms in the carbon skeleton possesses a porous structure and a considerable specific surface area. Benefited from the special one-dimensional morphology, the convenient channel provided by the porous structure, the synergistic effect from the homogeneous co-doping of N and S, and the existence of proper amount of Ni3S2, the Ni-NSPC-6 affords a remarkable electrocatalytic performance toward ORR, including positive onset and half-wave potentials, a high catalytic current density, a low Tafel slope for oxygen reduction reaction and a remarkable ORR durability. The controllable synthesis of MOF derived S, N co-doped carbon materials with porous nanostructure will offer prospects in developing high performance electrocatalysts.
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关键词
Oxygen reduction reaction,Metal-organic framework,S N co-doped carbon,Electrocatalyst
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