Cobalt and nitrogen codoped carbon materials(Co-N-C) were fabricated by pyrolysis of the mixture of poly(4-vinylpyridine) and cobalt chloride using SiO_2 nanoparticles as hard template, which were the first transition...Cobalt and nitrogen codoped carbon materials(Co-N-C) were fabricated by pyrolysis of the mixture of poly(4-vinylpyridine) and cobalt chloride using SiO_2 nanoparticles as hard template, which were the first transition metal/nitrogen-codoped carbon bifunctional electrocatalyst derived from noncarbonizable polymer for ORR and HER. The as-made Co-N-C possessed hierarchical pore structure and high specific surface area, achieving excellent electrocatalytic performances for ORR and HER. Its ORR catalytic performances were comparable to those of Pt/C catalyst and its HER catalytic performances were superior to those of most doped carbon catalysts in KOH electrolyte. Moreover, its bifunctional electrocatalytic performances for ORR and HER were better than those of most bifunctional doped carbon catalysts in alkaline electrolyte.展开更多
The zeolitic imidazolate frameworks(ZIFs)with threedimensional perio dic micropores encounter the barrier of mass transfer in the diffusion-limited processes.To solve this problem,fabricating the ZIFs combined intrins...The zeolitic imidazolate frameworks(ZIFs)with threedimensional perio dic micropores encounter the barrier of mass transfer in the diffusion-limited processes.To solve this problem,fabricating the ZIFs combined intrinsic micropores with ordered mesopores(mZIFs)is highly desirable.Herein,mZIFs were synthesized for the first time,achieved by employing a polymer-micelle template strategy.展开更多
基金supported by the National Natural Science Foundation of China(Nos.21774073,51690151,21404071,and 21320102006)the National Basic Research Program (No. 2016YFA0201500)
文摘Cobalt and nitrogen codoped carbon materials(Co-N-C) were fabricated by pyrolysis of the mixture of poly(4-vinylpyridine) and cobalt chloride using SiO_2 nanoparticles as hard template, which were the first transition metal/nitrogen-codoped carbon bifunctional electrocatalyst derived from noncarbonizable polymer for ORR and HER. The as-made Co-N-C possessed hierarchical pore structure and high specific surface area, achieving excellent electrocatalytic performances for ORR and HER. Its ORR catalytic performances were comparable to those of Pt/C catalyst and its HER catalytic performances were superior to those of most doped carbon catalysts in KOH electrolyte. Moreover, its bifunctional electrocatalytic performances for ORR and HER were better than those of most bifunctional doped carbon catalysts in alkaline electrolyte.
基金the National Natural Science Foundation of China(nos.21774073 and 51690151)the Special Fund for Science and Technology of Guangdong Province(no.190805155540379)for their financial support.
文摘The zeolitic imidazolate frameworks(ZIFs)with threedimensional perio dic micropores encounter the barrier of mass transfer in the diffusion-limited processes.To solve this problem,fabricating the ZIFs combined intrinsic micropores with ordered mesopores(mZIFs)is highly desirable.Herein,mZIFs were synthesized for the first time,achieved by employing a polymer-micelle template strategy.
