[1] GUPTA S, KELLOGG W, XU H, et al. Bifunctional perovskite oxide catalysts for oxygen reduction and evolution in alkaline media. Chemistry-An Asian Journal, 2016, 11(1): 10-21. [2] BAJDICH M, GARCIA-MOTA M, VOJVODIC A,et al. Theoretical investigation of the activity of cobalt oxides for the electrochemical oxidation of water. Journal of the American Chemical Society, 2013, 135(36): 13521-13530. [3] ZHANG L, CHEN H M, WEI Z D.Recent advance in transition metal oxide-based materials for oxygen evolution reaction electrocatalysts.CIESC Journal, 2020, 71(9): 3876-3904. [4] ZHANG P, LU X F, NAI J W, et al. Construction of hierarchical Co-Fe oxyphosphide microtubes for electrocatalytic overall water splitting. Advanced Science, 2019, 6(17): 1900576. [5] CHEN G, ZHU Y P, CHEN H M,et al. An amorphous nickel-iron- based electrocatalyst with unusual local structures for ultrafast oxygen evolution reaction. Advanced Materials, 2019, 31(28): 1900883. [6] REN W H, TAN X, YANG W F,et al. Isolated diatomic Ni-Fe metal-nitrogen sites for synergistic electroreduction of CO2. Angewandte Chemie International Edition, 2019, 58(21): 6972-6976. [7] CHEN J, LIU J W, XIE J Q,et al. Co-Fe-P nanotubes electrocatalysts derived from metal-organic frameworks for efficient hydrogen evolution reaction under wide pH range. Nano Energy, 2019, 56: 225-233. [8] SUN F Z, WANG G, DING Y Q,et al. NiFe-based metal-organic framework nanosheets directly supported on nickel foam acting as robust electrodes for electrochemical oxygen evolution reaction. Advanced Energy Materials, 2018, 8(21): 1800584. [9] TAO L, QIAO M, JIN R,et al. Bridging the surface charge and catalytic activity of a defective carbon electrocatalyst. Angewandte Chemie, 2019, 131(4): 1031-1036. [10] GAO X P, ZHOU Y, LIU S Q,et al. Single cobalt atom anchored on N-doped graphyne for boosting the overall water splitting. Applied Surface Science, 2020, 502: 144155. [11] MAHMOOD J, LEE E K, JUNG M, et al. Nitrogenated holey two- dimensional structures. Nature Communications, 2015, 6(1): 1-7. [12] DAI L M, XUE Y H, QU L T,et al. Metal-free catalysts for oxygen reduction reaction. Chemical Reviews, 2015, 115(11): 4823-4892. [13] ZHOU Y, GAO G P, LI Y,et al. Transition-metal single atoms in nitrogen-doped graphenes as efficient active centers for water splitting: a theoretical study. Physical Chemistry Chemical Physics, 2019, 21(6): 3024-3032. [14] SUEN N T, HUNG S F, QUAN Q,et al. Electrocatalysis for the oxygen evolution reaction: recent development and future perspectives. Chemical Society Reviews, 2017, 46(2): 337-365. [15] MONTOYA J H, SEITZ L C, CHAKTHRANONT P,et al. Materials for solar fuels and chemicals. Nature Materials, 2017, 16(1): 70-81. [16] WEI C, XU Z C J. The comprehensive understanding of as an evaluation parameter for electrochemical water splitting.Small Methods, 2018, 2(11): 1800168. [17] SEREDYCH M, HULICOVA-JURCAKOVA D, LU G Q, et al. Surface functional groups of carbons and the effects of their chemical character, density and accessibility to ions on electrochemical performance. Carbon, 2008, 46(11): 1475-1488. [18] WU H, ZHOU W, YILDIRIM T.Hydrogen storage in a prototypical zeolitic imidazolate framework-8.Journal of the American Chemical Society, 2007, 129(17): 5314-5315. [19] YAGHI O M, LI G M, LI H L.Selective binding and removal of guests in a microporous metal-organic framework.Nature, 1995, 378(6558): 703-706. [20] LI J M, KANG Y M, LIU D,et al. Nitrogen-doped graphitic carbon-supported ultrafine Co nanoparticles as an efficient multifunctional electrocatalyst for HER and rechargeable Zn-air batteries. ACS Applied Materials & Interfaces, 2020, 12(5): 5717-5729. [21] LI Z Y, LIANG X, GAO Q M, et al. Fe, N co-doped carbonaceous hollow spheres with self-grown carbon nanotubes as a high performance binary electrocatalyst. Carbon, 2019, 154: 466-477. [22] WU J H, HU L J, WANG N,et al. Surface confinement assisted synthesis of nitrogen-rich hollow carbon cages with Co nanoparticles as breathable electrodes for Zn-air batteries. Applied Catalysis B: Environmental, 2019, 254: 55-65. [23] LI H J, HE Y, HE T,et al. ZIF-derived Co nanoparticle/N-doped CNTs composites embedded in N-doped carbon substrate as efficient electrocatalyst for hydrogen and oxygen evolution. Journal of Materials Science: Materials in Electronics, 2019, 30(24): 21388-21397. [24] HAN M N, SHI M J, WANG J,et al. Efficient bifunctional Co/N dual-doped carbon electrocatalysts for oxygen reduction and evolution reaction. Carbon, 2019, 153: 575-584. [25] YUAN Q Y, YU Y X, GONG Y J,et al. Three-dimensional N-doped carbon nanotube frameworks on Ni foam derived from a metal-organic framework as a bifunctional electrocatalyst for overall water splitting. ACS Applied Materials & Interfaces, 2019, 12(3): 3592-3602. [26] GUAN Y N, LIU G H, LI J D,et al. Surface-engineered cobalt nitride composite as efficient bifunctional oxygen electrocatalyst. Nanotechnology, 2019, 30(49): 495406. [27] JIA Q Q, GAO Y, LI Y,et al. Cobalt nanoparticles embedded in N-doped carbon on carbon cloth as free-standing electrodes for electrochemically-assisted catalytic oxidation of phenol and overall water splitting. Carbon, 2019, 155: 287-297. [28] DU C, GAO Y J, WANG J G,et al. A new strategy for engineering a hierarchical porous carbon-anchored Fe single-atom electrocatalyst and the insights into its bifunctional catalysis for flexible rechargeable Zn-air batteries. Journal of Materials Chemistry A, 2020, 8(19): 9981-9990. [29] LI F, HAN G F, NOH H J,et al. Boosting oxygen reduction catalysis with abundant copper single atom active sites. Energy & Environmental Science, 2018, 11(8): 2263-2269. [30] HAN Y H, WANG Y G, CHEN W X,et al. Hollow N-doped carbon spheres with isolated cobalt single atomic sites: superior electrocatalysts for oxygen reduction. Journal of the American Chemical Society, 2017, 139(48): 17269-17272. [31] BING Q M, LIU W, YI W C,et al. Ni anchored C2N monolayers as low-cost and efficient catalysts for hydrogen production from formic acid. Journal of Power Sources, 2019, 413: 399-407. [32] WU J B, ZHOU H, LI Q,et al. Densely populated isolated single Co-N site for efficient oxygen electrocatalysis. Advanced Energy Materials, 2019, 9(22): 1900149. [33] WAN W C, TRIANA C A, LAN J G,et al. Bifunctional single atom electrocatalysts: coordination-performance correlations and reaction pathways. ACS Nano, 2020, 14(10): 13279-13293. [34] ZHANG Q Q, DUAN Z Y, LI M,et al. Atomic cobalt catalysts for the oxygen evolution reaction. Chemical Communications, 2020,56(5): 794-797. [35] ZHANG H B, LIU Y Y, CHEN T,et al. Unveiling the activity origin of electrocatalytic oxygen evolution over isolated Ni atoms supported on a N-doped carbon matrix. Advanced Materials, 2019, 31(48): 1904548. [36] FU Y, YU H Y, JIANG C,et al. NiCo alloy nanoparticles decorated on N-doped carbon nanofibers as highly active and durable oxygen electrocatalyst. Advanced Functional Materials, 2018, 28(9): 1705094. [37] CHEN L, XU Z X, HAN W J,et al. Bimetallic CoNi alloy nanoparticles embedded in pomegranate-like nitrogen-doped carbon spheres for electrocatalytic oxygen reduction and evolution. ACS Applied Nano Materials, 2020, 3(2): 1354-1362. [38] LIU G P, WANG B, DING P H,et al. In-situ synthesis strategy for CoM (M= Fe, Ni, Cu) bimetallic nanoparticles decorated N-doped 1D carbon nanotubes/3D porous carbon for electrocatalytic oxygen evolution reaction. Journal of Alloys and Compounds, 2020, 815: 152470. [39] LI G L, XU X C, YANG B B,et al. Micelle-template synthesis of a 3D porous FeNi alloy and nitrogen-codoped carbon material as a bifunctional oxygen electrocatalyst. Electrochimica Acta, 2020, 331: 135375. [40] LI X Z, FANG Y Y, LIN X Q,et al. MOF derived Co3O4 nanoparticles embedded in N-doped mesoporous carbon layer/ MWCNT hybrids: extraordinary bi-functional electrocatalysts for OER and ORR. Journal of Materials Chemistry A, 2015, 3(33): 17392-17402. [41] YUE X Y, SONG C S, YAN Z Y,et al. Reduced graphene oxide supported nitrogen-doped porous carbon-coated NiFe alloy composite with excellent electrocatalytic activity for oxygen evolution reaction. Applied Surface Science, 2019, 493: 963-974. [42] LI C L, WU M C, LIU R.High-performance bifunctional oxygen electrocatalysts for zinc-air batteries over mesoporous Fe/Co-NC nanofibers with embedding FeCo alloy nanoparticles.Applied Catalysis B: Environmental, 2019, 244: 150-158. [43] WANG Z, ANG J M, ZHANG B W, et al. FeCo/FeCoNi/N-doped carbon nanotubes grafted polyhedron-derived hybrid fibers as bifunctional oxygen electrocatalysts for durable rechargeable zinc-air battery. Applied Catalysis B: Environmental, 2019, 254: 26-36. [44] LI T F, LI S L, LIU Q Y,et al. Immobilization of Ni3Co nanoparticles into N-doped carbon nanotube/nanofiber integrated hierarchically branched architectures toward efficient overall water splitting. Advanced Science, 2020, 7(1): 1902371. [45] CHEN D, ZHU J W, MU X Q,et al. Nitrogen-doped carbon coupled FeNi3 intermetallic compound as advanced bifunctional electrocatalyst for OER, ORR and Zn-air batteries. Applied Catalysis B: Environmental, 2020, 268: 118729. [46] ZHANG X J, CHEN Y F, WANG B,et al. FeNi nanoparticles embedded porous nitrogen-doped nanocarbon as efficient electrocatalyst for oxygen evolution reaction. Electrochimica Acta, 2019, 321: 134720. [47] WANG Z Y, LIAO X B, LIN Z F,et al. 3D Nitrogen-doped graphene encapsulated metallic nickel-iron alloy nanoparticles for efficient bifunctional oxygen electrocatalysis. Chemistry-A European Journal, 2020, 26(18): 4044-4051. [48] LEI H, WANG Z L, YANG F,et al. NiFe nanoparticles embedded N-doped carbon nanotubes as high-efficient electrocatalysts for wearable solid-state Zn-air batteries. Nano Energy, 2020, 68: 104293. [49] JIN Q Y, REN B W, CHEN J P,et al. A facile method to conduct 3D self-supporting Co-FeCo/N-doped graphene-like carbon bifunctional electrocatalysts for flexible solid-state zinc air battery. Applied Catalysis B: Environmental, 2019, 256: 117887. [50] XU Q F, JIANG H, LI Y H, et al. In-situ enriching active sites on co-doped Fe-Co4N@NC nanosheet array as air cathode for flexible rechargeable Zn-air batteries. Applied Catalysis B: Environmental, 2019, 256: 117893. [51] XIAO X, LI X H, YU G Q,et al. FeCox alloy nanoparticles encapsulated in three-dimensionally N-doped porous carbon/multiwalled carbon nanotubes composites as bifunctional electrocatalyst for zinc-air battery. Journal of Power Sources, 2019, 438: 227019. [52] GUPTA S, YADAV A, BHARTIYA S,et al. Co oxide nanostructures for electrocatalytic water-oxidation: effects of dimensionality and related properties. Nanoscale, 2018, 10(18): 8806-8819. [53] OU G, FAN P X, ZHANG H J,et al. Large-scale hierarchical oxide nanostructures for high-performance electrocatalytic water splitting. Nano Energy, 2017, 35: 207-214. [54] KONG D Z, WANG Y, HUANG S Z,et al. 3D self-branched zinc-cobalt oxide@N-doped carbon hollow nanowall arrays for high-performance asymmetric supercapacitors and oxygen electrocatalysis. Energy Storage Materials, 2019, 23: 653-663. [55] XIE A J, ZHANG J, TAO X,et al. Nickel-based MOF derived Ni@NiO/N-C nanowires with core-shell structure for oxygen evolution reaction. Electrochimica Acta, 2019, 324: 134814. [56] XU L, ZOU Y Q, XIAO Z H, et al. Transforming Co3O4 nanosheets into porous N-doped CoxOy nanosheets with oxygen vacancies for the oxygen evolution reaction. Journal of Energy Chemistry, 2019, 35: 24-29. [57] HE X, LUAN S Z, WANG L,et al. Facile loading mesoporous Co3O4 on nitrogen doped carbon matrix as an enhanced oxygen electrode catalyst. Materials Letters, 2019, 244: 78-82. [58] JIN H Y, WANG J, SU D F,et al. In situ cobalt-cobalt oxide/ N-doped carbon hybrids as superior bifunctional electrocatalysts for hydrogen and oxygen evolution. Journal of the American Chemical Society, 2015, 137(7): 2688-2694. [59] LI X R, WEI J L, LI Q, et al. Nitrogen-doped cobalt oxide nanostructures derived from cobalt-alanine complexes for high- performance oxygen evolution reactions. Advanced Functional Materials, 2018, 28(23): 1800886. [60] ZHANG K L, XIA X H, DENG S J,et al. N-doped CoO nanowire arrays as efficient electrocatalysts for oxygen evolution reaction. Journal of Energy Chemistry, 2019, 37: 13-17. [61] DING Y J, YANG W Y, GAO S,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, 2019, 3(2): 1328-1337. |