[1] [1] Xia W, Zou R, An L, et al. A metal-organic framework route to in situ encapsulation of Co@Co3O4@Core@ bishell nanoparticles into a highly ordered porous carbon matrix for oxygen reduction[J].Energy & Environmental Science,2015,8(2):568-576.

[2] [2] Guo S, Zhang S, Sun S. Tuning nanoparticle catalysis for the oxygen reduction reaction[J].Angewandte Chemie International Edition,2013,52(33):8526-8544.

[3] [3] Liang J, Zheng Y, Chen J, et al. Facile oxygen reduction on a three-dimensionally ordered macroporous graphitic C3N4/carbon composite electrocatalyst[J].Angewandte Chemie International Edition,2012,51(16):3892-3896.

[4] [4] Park H, Oh S, Lee S, et al. Cobalt-and nitrogen-codoped porous carbon catalyst made from core-shell type hybrid metal-organic framework (ZIF-L@ ZIF-67) and its efficient oxygen reduction reaction (ORR) activity[J].Applied Catalysis B:Environmental,2019,246:322-329.

[5] [5] Liang Y, Li Y, Wang H, et al. Co3O4 nanocrystals on graphene as a synergistic catalyst for oxygen reduction reaction[J].Nature Materials,2011,10(10):780.

[6] [6] Hijazi I, Bourgeteau T, Cornut R, et al. Carbon nanotube-templated synthesis of covalent porphyrin network for oxygen reduction reaction[J].Journal of the American Chemical Society,2004,136(17):6348-6354.

[7] [7] Lee K R, Kang E S, Kim Y T, et al. Enhancement of catalytic activity of a programmed gold nanoparticle superstructure modulated by supramolecular protein assembly[J].Catalysis Today,2017,295:95-101.

[8] [8] Sun J, Lowe S E, Zhang L, et al. Ultrathin nitrogen-doped holey carbon@graphene bifunctional electrocatalyst for oxygen reduction and evolution reactions in alkaline and acidic media[J].Angewandte Chemie,2018,130(50):16749-16753.

[9] [9] Yan D, Guo L, Xie C, et al. N, P-dual doped carbon with trace Co and rich edge sites as highly efficient electrocatalyst for oxygen reduction reaction[J].Science China Materials,2018,61(5):679-685.

[10] [10] Wang Y, Tao L, Xiao Z, et al. 3D carbon electrocatalysts in situ constructed by defect-rich nanosheets and polyhedrons from NaCl-sealed zeolitic imidazolate frameworks[J].Advanced Functional Materials,2018,28(11):1705356.

[11] [11] Ye L, Chai G, Wen Z. Zn-MOF-74 derived N-doped mesoporous carbon as pH-universal electrocatalyst for oxygen reduction reaction[J].Advanced Functional Materials,2017,27(14):1606190.

[12] [12] Zhang W, Yao X, Zhou S, et al. ZIF-8/ZIF-67-derived Co-Nx-embedded 1D porous carbon nanofibers with graphitic carbon-encased Co nanoparticles as an efficient bifunctional electrocatalyst[J]. Small, 2018,14(24):1800423.

[13] [13] Park K S, Ni Z, Cté A P, et al. Exceptional chemical and thermal stability of zeolitic imidazolate frameworks[J].Proceedings of the National Academy of Sciences,2006,103(27):10186-10191.

[14] [14] Dou S, Li X, Tao L, et al. Cobalt nanoparticle-embedded carbon nanotube/porous carbon hybrid derived from MOF-encapsulated Co3O4 for oxygen electrocatalysis[J].Chemical Communications,2016,52(62):9727-9730.

[15] [15] Li R, Wang X, Dong Y, et al. Nitrogen-doped carbon nanotubes decorated with cobalt nanoparticles derived from zeolitic imidazolate framework-67 for highly efficient oxygen reduction reaction electrocatalysis[J].Carbon,2018,132:580-588.

[16] [16] Zhang H, Osgood H, Xie X, et al. Engineering nanostructures of PGM-free oxygen-reduction catalysts using metal-organic frameworks[J].Nano Energy,2017,31:331-350.

[17] [17] Wang R, Dong X Y, Du J, et al. MOF-derived bifunctional Cu3P nanoparticles coated by a N, P-codoped carbon shell for hydrogen evolution and oxygen reduction[J].Advanced Materials, 2018,30(6):1703711.

[18] [18] Zhang M, Dai Q, Zheng H, et al. Novel MOF-derived Co@ N-C bifunctional catalysts for highly efficient Zn-air batteries and water splitting[J].Advanced Materials,2018,30(10):1705431.

[19] [19] Qu Y, Li Z, Chen W, et al. Direct transformation of bulk copper into copper single sites via emitting and trapping of atoms[J].Nature Catalysis,2018,1(10):781-786.

[20] [20] Gong K, Du F, Xia Z, et al. Nitrogen-doped carbon nanotube arrays with high electrocatalytic activity for oxygen reduction[J].Science,2009,323(5915):760-764.

[21] [21] Matter P H, Zhang L, Ozkan U S. The role of nanostructure in nitrogen-containing carbon catalysts for the oxygen reduction reaction[J].Journal of Catalysis,2006,239(1):83-96.

[22] [22] Jaouen F, Marcotte S, Dodelet J P, et al. Oxygen reduction catalysts for polymer electrolyte fuel cells from the pyrolysis of iron acetate adsorbed on various carbon supports[J].The Journal of Physical Chemistry B,2003,107(6):1376-1386.

[23] [23] Yin H, Zhang C, Liu F, et al. Hybrid of iron nitride and nitrogen-doped graphene aerogel as synergistic catalyst for oxygen reduction reaction[J].Advanced Functional Materials,2014,24(20):2930-2937.

[24] [24] Han X, Sun L, Wang F, et al. MOF-derived honeycomb-like-N-doped carbon structures assembled from mesoporous nanosheets with superior performance in lithium-ion batteries[J].Journal of Materials Chemistry A,2018,6(39):18891-18897.

[25] [25] Zhang J, Zhang C, Zhao Y, et al. Three dimensional few-layer porous carbon nanosheets towards oxygen reduction[J].Applied Catalysis B:Environmental,2017,211:148-156.

[26] [26] Zhu J, Li W, Li S, et al. Defective N/S-codoped 3D cheese-like porous carbon nanomaterial toward efficient oxygen reduction and Zn-Air Batteries[J].Small,2018,14(21):1800563.

[27] [27] Chen Y Z, Wang C, Wu Z Y, et al. From bimetallic metal-organic framework to porous carbon:high surface area and multicomponent active dopants for excellent electrocatalysis[J].Advanced Materials,2015,27(34):5010-5016.

[28] [28] Hu Q, Li G, Li G, et al. Trifunctional electrocatalysis on dual-doped graphene nanorings-integrated boxes for efficient water splitting and Zn-air batteries[J]. Advanced Energy Materials,2019,9(14):1803867.