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Hu Z, Zhang Z, Li Z, et al. One-Step Conversion from Core-Shell Metal-Organic Framework Materials to Cobalt and Nitrogen Codoped Carbon Nanopolyhedra with Hierarchically Porous Structure for Highly Efficient Oxygen Reduction. ACS Appl Mater Interfaces. 2017;9(19):16109-16116doi: 10.1021/acsami.7b00736.
Hu, Z., Zhang, Z., Li, Z., Dou, M., & Wang, F. (2017). One-Step Conversion from Core-Shell Metal-Organic Framework Materials to Cobalt and Nitrogen Codoped Carbon Nanopolyhedra with Hierarchically Porous Structure for Highly Efficient Oxygen Reduction. ACS applied materials & interfaces, 9(19), 16109-16116. https://doi.org/10.1021/acsami.7b00736
Hu, Zhaowen, et al. "One-Step Conversion from Core-Shell Metal-Organic Framework Materials to Cobalt and Nitrogen Codoped Carbon Nanopolyhedra with Hierarchically Porous Structure for Highly Efficient Oxygen Reduction." ACS applied materials & interfaces vol. 9,19 (2017): 16109-16116. doi: https://doi.org/10.1021/acsami.7b00736
Hu Z, Zhang Z, Li Z, Dou M, Wang F. One-Step Conversion from Core-Shell Metal-Organic Framework Materials to Cobalt and Nitrogen Codoped Carbon Nanopolyhedra with Hierarchically Porous Structure for Highly Efficient Oxygen Reduction. ACS Appl Mater Interfaces. 2017 May 17;9(19):16109-16116. doi: 10.1021/acsami.7b00736. Epub 2017 May 03. PMID: 28452486.
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ACS Appl Mater Interfaces. 2017 May 17;9(19):16109-16116. doi: 10.1021/acsami.7b00736. Epub 2017 May 03.

One-Step Conversion from Core-Shell Metal-Organic Framework Materials to Cobalt and Nitrogen Codoped Carbon Nanopolyhedra with Hierarchically Porous Structure for Highly Efficient Oxygen Reduction.

ACS applied materials & interfaces

Zhaowen Hu, Zhengping Zhang, Zhilin Li, Meiling Dou, Feng Wang

Affiliations

  1. State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology , Beijing 100029, P. R. China.

PMID: 28452486 DOI: 10.1021/acsami.7b00736

Abstract

Rational design of porous structure is an effective way to fabricate the nonprecious metal electrocatalysts (NPMCs) toward oxygen reduction reaction (ORR) with high activity comparable or even superior to Pt-based electrocatalysts. Herein, we demonstrate a facile synthetic route to fabricate cobalt and nitrogen codoped carbon nanopolyhedra with hierarchically porous structure (Co,N-HCNP) by one-step carbonization of core-shell structured ZIF-8@ZIF-67 crystals. The resultant Co,N-HCNP electrocatalyst possesses a unique hierarchically micro/mesoporous structure with internal micropores and external mesopores, of which sufficient exposure and accessibility of ORR active sites can be achieved due to the large specific surface area and efficient transport pathway. More importantly, the existence of ZIF-8 core in the core-shell structured ZIF-8@ZIF-67 can promote the homogeneous pyrolysis of ZIF-67 shell, leading to a uniform distribution of Co-N

Keywords: cobalt and nitrogen codoped carbon nanopolyhedra; core−shell metal−organic framework materials; electrocatalysts; hierarchically porous structure; one-step carbonization; oxygen reduction reaction

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