[1] [1] S. Stiber, H. Balzer, A. Wierhake, F.J. Wirkert, J. Roth et al., Porous transport layers for proton exchange membrane electrolysis under extreme conditions of current density, temperature, and pressure. Adv. Energy Mater. 11, 2100630 (2021). 10.1002/aenm.202100630

[2] [2] H. Wang, J. Gao, C. Chen, W. Zhao, Z. Zhang et al., PtNi-W/C with atomically dispersed tungsten sites toward boosted ORR in proton exchange membrane fuel cell devices. Nano-Micro Lett. 15, 143 (2023). 10.1007/s40820-023-01102-9

[3] [3] K.G. Santos, C.T. Eckert, E. Rossi, R.A. Bariccatti, E.P. Frigo et al., Hydrogen production in the electrolysis of water in Brazil, a review. Renew. Sust. Energ. Rev. 68, 563 (2017). https://www.sciencedirect.com/science/article/pii/S1364032116306372

[4] [4] O. Schmidt, A. Gambhir, I. Staffell, A. Hawkes, J. Nelson et al., Future cost and performance of water electrolysis: an expert elicitation study. Int. J. Hydrogen Energy 42(52), 30470 (2017). 10.1016/j.ijhydene.2017.10.045

[5] [5] P. Thangavel, M. Ha, S. Kumaraguru, A. Meena, A.N. Singh et al., Graphene-nanoplatelets-supported NiFe-MOF: high-efficiency and ultra-stable oxygen electrodes for sustained alkaline anion exchange membrane water electrolysis. Energy Environ. Sci. 13(10), 3447 (2020). 10.1039/D0EE00877J

[6] [6] Z.W. Seh, J. Kibsgaard, C.F. Dickens, I. Chorkendorff, J.K. Nørskov et al., Combining theory and experiment in electrocatalysis: insights into materials design. Science 355(6321), eaad4998 (2017).

[7] [7] F. Song, L. Bai, A. Moysiadou, S. Lee, C. Hu et al., Transition metal oxides as electrocatalysts for the oxygen evolution reaction in alkaline solutions: an application-inspired renaissance. J. Am. Chem. Soc. 140(25), 7748 (2018). 10.1021/jacs.8b04546

[8] [8] B. Guo, Y. Ding, H. Huo, X. Wen, X. Ren et al., Recent advances of transition metal basic salts for electrocatalytic oxygen evolution reaction and overall water electrolysis. Nano-Micro Lett. 15, 57 (2023). 10.1007/s40820-023-01038-0

[9] [9] Y.P. Zhu, T.Y. Ma, M. Jaroniec, S.Z. Qiao et al., Self-templating synthesis of hollow Co3O4 microtube arrays for highly efficient water electrolysis. Angew. Chem. Int. Ed. 56(5), 1324 (2017). 10.1002/anie.201610413

[10] [10] J. Li, J. Li, J. Ren, H. Hong, D. Liu et al., Electric-field-treated Ni/Co3O4 film as high-performance bifunctional electrocatalysts for efficient overall water splitting. Nano-Micro Lett. 14, 148 (2022). 10.1007/s40820-022-00889-3

[11] [11] Q. Zhou, C. Xu, J. Hou, W. Ma, T. Jian et al., Duplex interpenetrating-phase FeNiZn and FeNi3 heterostructure with low-Gibbs free energy interface coupling for highly efficient overall water splitting. Nano-Micro Lett. 15, 95 (2023). 10.1007/s40820-023-01066-w

[12] [12] A. Lončar, D. Escalera-López, S. Cherevko, N. Hodnik, Inter-relationships between oxygen evolution and Iridium dissolution mechanisms. Angew. Chem. Int. Ed. 61(14), e202114437 (2022). 10.1002/anie.202114437

[13] [13] C. Wang, Q. Zhang, B. Yan, B. You, J. Zheng et al., Facet engineering of advanced electrocatalysts toward hydrogen/oxygen evolution reactions. Nano-Micro Lett. 15, 52 (2023). 10.1007/s40820-023-01024-6

[14] [14] J.J. Song, C. Wei, Z.F. Huang, C.T. Liu, X. Wang et al., A review on fundamentals for designing oxygen evolution electrocatalysts. Chem. Soc. Rev. 49(7), 2196 (2020). 10.1039/C9CS00607A

[15] [15] Z.F. Huang, J. Song, Y. Du, S. Xi, S. Dou et al., Chemical and structural origin of lattice oxygen oxidation in Co–Zn oxyhydroxide oxygen evolution electrocatalysts. Nat. Energy 4(4), 329 (2019). 10.1038/s41560-019-0355-9

[16] [16] J.T. Li, Oxygen evolution reaction in energy conversion and storage: design strategies under and beyond the energy scaling relationship. Nano-Micro Lett. 14(1), 112 (2022). 10.1007/s40820-022-00857-x

[17] [17] I. Vincent, A. Kruger, D. Bessarabov, Development of efficient membrane electrode assembly for low cost hydrogen production by anion exchange membrane electrolysis. Int. J. Hydrogen Energy 42(16), 10752 (2017). https://www.sciencedirect.com/science/article/pii/S036031991730993X

[18] [18] J. Hnát, M. Plevová, J. Žitka, M. Paidar, K. Bouzek, Anion-selective materials with 1,4-diazabicyclo[2.2.2]octane functional groups for advanced alkaline water electrolysis. electrochim. Acta 248, 547 (2017). https://www.sciencedirect.com/science/article/pii/S0013468617316031

[19] [19] T.T. Wang, X. Li, Y.J. Pang, X.R. Gao, Z.K. Kou et al., Unlocking the synergy of interface and oxygen vacancy by core-shell nickel phosphide@oxyhydroxide nanosheets arrays for accelerating alkaline oxygen evolution kinetics. Chem. Eng. J. 425, 131491 (2021). https://www.sciencedirect.com/science/article/pii/S1385894721030722

[20] [20] C. Hu, L. Dai, Multifunctional carbon-based metal-free electrocatalysts for simultaneous oxygen reduction, oxygen evolution, and hydrogen evolution. Adv. Mater. 29(9), 1604942 (2017). 10.1002/adma.201604942

[21] [21] N.U. Hassan, M. Mandal, G. Huang, H.A. Firouzjaie, P.A. Kohl, Achieving high-performance and 2000 h stability in anion exchange membrane fuel cells by manipulating ionomer properties and electrode optimization. Adv. Energy Mater. 10(40), 2001986 (2020). 10.1002/aenm.202001986

[22] [22] A. Kumar, V.Q. Bui, J. Lee, A.R. Jadhav, Y. Hwang et al., Modulating interfacial charge density of NiP2–FeP2 via coupling with metallic Cu for accelerating alkaline hydrogen evolution. ACS Energy Lett. 6(2), 354 (2021). 10.1021/acsenergylett.0c02498

[23] [23] D. Li, A.R. Motz, C. Bae, C. Fujimoto, G. Yang et al., Durability of anion exchange membrane water electrolyzers. Energy Environ. Sci. 14(6), 3393 (2021). 10.1039/D0EE04086J

[24] [24] I.V. Pushkareva, A.S. Pushkarev, S.A. Grigoriev, P. Modisha, D.G. Bessarabov, Comparative study of anion exchange membranes for low-cost water electrolysis. Int. J. Hydrogen Energy 45(49), 26070 (2020). https://www.sciencedirect.com/science/article/pii/S0360319919341588

[25] [25] O. Heijden, S. Park, J. Eggebeen, M. Koper, Non-kinetic effects convolute activity and tafel analysis for the alkaline oxygen evolution reaction on NiFeOOH electrocatalysts. Angew. Chem. Int. Ed. 62(7), e202216477 (2022). 10.1002/anie.202216477

[26] [26] S. Lee, K. Banjac, M. Lingenfelder, X. Hu, Oxygen isotope labeling experiments reveal different reaction sites for the oxygen evolution reaction on nickel and nickel iron oxides. Angew. Chem. Int. Ed. 58(30), 10295 (2019). 10.1002/anie.201903200

[27] [27] L. An, J. Feng, Y. Zhang, R. Wang, H. Liu et al., Epitaxial heterogeneous interfaces on N-NiMoO4/NiS2 nanowires/nanosheets to boost hydrogen and oxygen production for overall water splitting. Adv. Funct. Mater. 29(1), 1805298 (2019). 10.1002/adfm.201805298

[28] [28] P. Phonsuksawang, P. Khajondetchairit, T. Butburee, S. Sattayaporn, N. Chanlek et al., Effects of Fe doping on enhancing electrochemical properties of NiCo2S4 supercapacitor electrode. Electrochim. Acta 340, 135939 (2020). https://www.sciencedirect.com/science/article/pii/S0013468620303315

[29] [29] D. Liang, C. Lian, Q. Xu, M. Liu, H. Liu et al., Interfacial charge polarization in Co2P2O7@N, P Co-doped carbon nanocages as Mott-Schottky electrocatalysts for accelerating oxygen evolution reaction. Appl. Catal. B 268, 118417 (2020). https://www.sciencedirect.com/science/article/pii/S0926337319311634

[30] [30] Y. Liu, Y. Chen, Y. Tian, T. Sakthivel, H. Liu et al., Synergizing hydrogen spillover and deprotonation by the internal polarization field in a MoS2/NiPS3 vertical heterostructure for boosted water electrolysis. Adv. Mater. 34(37), 2203615 (2022). 10.1002/adma.202203615

[31] [31] C. Lyu, J. Cheng, K. Wu, J. Wu, N. Wang, Interfacial electronic structure modulation of CoP nanowires with FeP nanosheets for enhanced hydrogen evolution under alkaline water/seawater electrolytes. Appl. Catal. B 317, 121799 (2022). https://www.sciencedirect.com/science/article/pii/S0926337322007408

[32] [32] X. Wang, X. Zong, B. Liu, G. Long, A. Wang et al., Boosting electrochemical water oxidation on NiFe (oxy) hydroxides by constructing schottky junction toward water electrolysis under industrial conditions. Small 18(4), 2105544 (2022). 10.1002/smll.202105544

[33] [33] W.J. Sun, H.Q. Ji, L.X. Li, H.Y. Zhang, Z.K. Wang et al., Built-in electric field triggered interfacial accumulation effect for efficient nitrate removal at ultra-low concentration and electroreduction to ammonia. Angew. Chem. Int. Ed. 60(42), 22933 (2021). 10.1002/anie.202109785

[34] [34] Y. Kim, M. Ha, R. Anand, M. Zafari, J.M. Baik et al., Unveiling a surface electronic descriptor for Fe–Co mixing enhanced the stability and efficiency of perovskite oxygen evolution electrocatalysts. ACS Catal. 12(23), 14698 (2022). 10.1021/acscatal.2c04424

[35] [35] Q. Wen, K. Yang, D. Huang, G. Cheng, X. Ai et al., Schottky heterojunction nanosheet array achieving high-current-density oxygen evolution for industrial water splitting electrolyzers. Adv. Energy Mater. 11(46), 2102353 (2021). 10.1002/aenm.202102353

[36] [36] A. Zagalskaya, V. Alexandrov, Role of defects in the interplay between adsorbate evolving and lattice oxygen mechanisms of the oxygen evolution reaction in RuO2 and IrO2. ACS Catal. 10(6), 3650 (2020). 10.1021/acscatal.9b05544

[37] [37] Y. Lin, Z. Liu, L. Yu, G.R. Zhang, H. Tan et al., Overall oxygen electrocatalysis on nitrogen-modified carbon catalysts: identification of active sites and in situ observation of reactive intermediates. Angew. Chem. Int. Ed. 60(6), 3299 (2021). 10.1002/anie.202012615

[38] [38] P. Wang, R. Qin, P. Ji, Z. Pu, J. Zhu et al., Synergistic coupling of Ni nanoparticles with Ni3C nanosheets for highly efficient overall water splitting. Small 16(37), 2001642 (2020). 10.1002/smll.202001642

[39] [39] X. Luo, P. Ji, P. Wang, X. Tan, L. Chen et al., Spherical Ni3S2/Fe–NiPx magic cube with ultrahigh water/seawater oxidation efficiency. Adv. Sci. 9(7), 2104846 (2022). 10.1002/advs.202104846

[40] [40] T. Wu, S. Zhang, K. Bu, W. Zhao, Q. Bi et al., Nickel nitride–black phosphorus heterostructure nanosheets for boosting the electrocatalytic activity toward the oxygen evolution reaction. J. Mater. Chem. A 7(38), 22063 (2019). 10.1039/C9TA07962A

[41] [41] Y. Liu, J. Zhang, Y. Li, Q. Qian, Z. Li et al., Realizing the synergy of interface engineering and chemical substitution for Ni3N enables its bifunctionality toward hydrazine oxidation assisted energy-saving hydrogen production. Adv. Funct. Mater. 31(35), 2103673 (2021). 10.1002/adfm.202103673

[42] [42] C. Kuai, C. Xi, A. Hu, Y. Zhang, Z. Xu et al., Revealing the dynamics and roles of iron incorporation in nickel hydroxide water oxidation catalysts. J. Am. Chem. Soc. 143(44), 18519 (2021). 10.1021/jacs.1c07975

[43] [43] L. Trotochaud, S.L. Young, J.K. Ranney, S.W. Boettcher, Nickel–iron oxyhydroxide oxygen-evolution electrocatalysts: the role of intentional and incidental iron incorporation. J. Am. Chem. Soc. 136(18), 6744 (2014). 10.1021/ja502379c

[44] [44] Y. Bai, Y. Wu, X. Zhou, Y. Ye, K. Nie et al., Promoting nickel oxidation state transitions in single-layer NiFeB hydroxide nanosheets for efficient oxygen evolution. Nat. Commun. 13(1), 6094 (2022). 10.1038/s41467-022-33846-0

[45] [45] Y. Li, C.K. Peng, H. Hu, S.Y. Chen, J.H. Choi et al., Interstitial boron-triggered electron-deficient Os aerogels for enhanced pH-universal hydrogen evolution. Nat. Commun. 13(1), 1143 (2022). 10.1038/s41467-022-28805-8

[46] [46] Y. Yang, P. Li, X. Zheng, W. Sun, S.X. Dou et al., Anion-exchange membrane water electrolyzers and fuel cells. Chem. Soc. Rev. 51(23), 9620 (2022). 10.1039/D2CS00038E