Anion exchange membrane water electrolysis (AEMWE) is advantageous in terms of device cost, compared with proton exchange membrane water electrolysis, because non-noble metal-based catalyst in alkaline condition is applicable.1 In AEMWE device, the membrane electrode assemblies (MEAs) plays an important role on the cell performance and stability.2 And the MEAs fabricated by (catalyst-coated-membrane) CCM cathode and (catalyst-coated-substrate) CCS anode is proved to be appropriate configuration.3 In the conventional way, the CCM cathode employs an ionomer/binder to combine the catalyst layer and AEM together, which however suffers the problem of degradation, thus limiting the life time of the device.2 We have reported an electroless deposition process that allows Ni-based metal to be deposited directly on AEM surface, which opens the possibility to fabricate CCM without ionomer/binder.4 In this work, NiFeP films (1 cm × 1 cm in area, ~3 μm in thickness) is electrolessly deposited on Tokuyama A-201 AEM as HER catalyst in room temperature AEMWE device. Electroless deposition method forms NiFeP films on AEM surface without binder, thus avoiding the disadvantage of degradation of the catalyst due to the ionomer/binder. The successfully deposited NiFeP catalyst exhibits outstanding HER performance by delivering -500 mA/cm2 at overpotential of -0.50 V in 1.0 M K2CO3 at room temperature. Furthermore, the NiFeP catalyst shows a good stability by delivering -500 mA/cm2 for at least 20 h without obvious potential loss. The outstanding HER performance of NiFeP should originates from the increased number of active sites caused by porous structure of the interface and the enhanced intrinsic activity caused by the well-tuned electronic structure. A series of characterization would be presented in terms of composition, morphology, phase and electron transfer behavior of the NiFeP films. Our work is hoped to give a new insight of fabrication of MEAs to achieve better performance of AEMWE devices. References R. R. Raja Sulaiman, W. Y. Wong, and K. S. Loh, Intl J of Energy Research, 46, 2241–2276 (2022).Y. Leng et al., J. Am. Chem. Soc., 134, 9054–9057 (2012).H. Ito et al., J Appl Electrochem, 48, 305–316 (2018).T. Fujimura, M. Kunimoto, Y. Fukunaka, H. Ito, and T. Homma, Electrochemistry, 89, 192–196 (2021).