Hong, Yongju Jeong, Sangyeon Seol, Jae Hun Kim, Taekyung Cho, Seong Chan Lee, Tae Kyung Yang, Chaeyoen Baik, Hionsuck Park, Hyun S. Lee, Eunsoo Yoo, Sung Jong Lee, Sang Uck Lee, Kwangyeol 2024-06-07T05:30:26Z 2024-06-07T05:30:26Z 2024-06-07 2024-08 1614-6832 https://pubs.kist.re.kr/handle/201004/150029 Efficient and durable electrocatalysts toward alkaline hydrogen evolution reaction (HER) are of great significance for the widespread application of anion-exchange membrane water electrolyzer (AEMWE). Numerous single-phase catalysts, such as Ru2P, have been explored as efficient HER catalysts; however, many have failed to overcome the inherent sluggish kinetics of the two separate steps involved in the alkaline HER: water dissociation and hydrogen production. In this study, density functional theory calculations are conducted to identify promising combinations of Ir2P and Ru2P materials that promote fast cascade water dissociation and H-2 production via kinetically favorable hydrogen spillover from the Ru2P surface to the adjacent Ir2P. An unprecedented construction of Ir2P cluster-decorated Ru2P hollow nanotubes (c-RP/IP HNTs), which feature a cooperative heterostructural synergy are developed. This configuration shows greater performance than commercial Pt/C, achieving an overpotential of 23.2 mV at 10 mA cm(-)(2) and maintaining long-term stability for 55 h in half-cell tests. Furthermore, the practical AEMWE test, incorporating c-RP/IP HNTs, demonstrated a remarkable single-cell performance of 12.23 A cm(-2) at 2.0 V and operated stably under 1.0 A cm(-2) for over 250 h. This surpasses that of the state-of-the-art proton-exchange membrane WE. English Wiley-VCH Verlag Ru2P/Ir2P Heterostructure Promotes Hydrogen Spillover for Efficient Alkaline Hydrogen Evolution Reaction Article 10.1002/aenm.202401426 1 Advanced Energy Materials, v.14, no.29 Advanced Energy Materials 14 29 N scie scopus 001230832300001 2-s2.0-85194493548 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Energy & Fuels Materials Science Physics Article ACTIVE-SITES ENERGY PLATINUM ELECTROCATALYSTS POINTS anion-exchange anion-exchange membrane water electrolyzer cation-exchange hydrogen evolution reaction phosphide