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Strongly Cooperative Nano-CoO/Co Active Phase in Hierarchically Porous Nitrogen-Doped Carbon Microspheres for Efficient Bifunctional Oxygen Electrocatalysis
Ding, Yajun; Yang, Weiyi; Gao, Shuang; Sun, Wuzhu; Sun, Caixia; Li, Qi
2020-02-01
Source PublicationACS APPLIED ENERGY MATERIALS
Volume3Issue:2Pages:1328-1337
AbstractThe development of highly efficient, non-noble-metal-based bifunctional oxygen electrocatalysts with low cost for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is the key for the commercialization of rechargeable metal-air batteries and regenerative fuel cells. In this work, a non-noble metal-based, hierarchically porous CoO/Co@N-C microsphere electrocatalyst with low cost and earth-abundance was created by directly reducing carbonized glucose coated urchin-like Co3O4 microspheres through the carbon-thermal processing with NH3 reducing environment. Urchin-like Co3O4 microspheres provided a Co source for the creation of nano-CoO/Co active phase and served as the template without a removal requirement for the creation of hierarchically porous N-doped carbon microsphere matrix with abundant macropores and mesopores for efficient mass diffusion. Among its three major components, CoO played the leading role to provide both ORR and OER active sites, a porous N-doped carbon microsphere matrix mainly provided the conductive catalyst support, and the metallic Co component mainly acted as a "bridge" between CoO and graphic carbon to reduce the electron transfer resistance for the enhancement of its conductivity. Thus, their synergetic effect within its unique structure endowed a superior bifunctional performance toward both ORR and OER to the CoO/Co@N-C electrocatalyst over the commercially available Pt/C and Ir/C electrocatalysts.
DOI10.1021/acsaem.9b01660
WOS IDWOS:000516665300012
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/83175
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Ding, Yajun,Yang, Weiyi,Gao, Shuang,et al. Strongly Cooperative Nano-CoO/Co Active Phase in Hierarchically Porous Nitrogen-Doped Carbon Microspheres for Efficient Bifunctional Oxygen Electrocatalysis[J]. ACS APPLIED ENERGY MATERIALS,2020,3(2):1328-1337.
APA Ding, Yajun,Yang, Weiyi,Gao, Shuang,Sun, Wuzhu,Sun, Caixia,&Li, Qi.(2020).Strongly Cooperative Nano-CoO/Co Active Phase in Hierarchically Porous Nitrogen-Doped Carbon Microspheres for Efficient Bifunctional Oxygen Electrocatalysis.ACS APPLIED ENERGY MATERIALS,3(2),1328-1337.
MLA Ding, Yajun,et al."Strongly Cooperative Nano-CoO/Co Active Phase in Hierarchically Porous Nitrogen-Doped Carbon Microspheres for Efficient Bifunctional Oxygen Electrocatalysis".ACS APPLIED ENERGY MATERIALS 3.2(2020):1328-1337.
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