Iridium‑Cluster‑Implanted Ruthenium Phosphide Electrocatalyst for Hydrogen Evolution Reaction  

作　　者：Kyounghoon Jung Dwi Sakti Aldianto Pratama Andi Haryanto Jin Il Jang Hyung Min Kim Jae‑Chan Kim Chan Woo Lee Dong‑Wan Kim 

机构地区：[1]School of Civil,Environmental,and Architectural Engineering,Korea University,Seoul 02841,Republic of Korea [2]Department of Chemistry,Kookmin University,Seoul 02707,Republic of Korea [3]Materials Science and Chemical Engineering Center,Institute for Advanced Engineering,Yongin‑si 17180,Republic of Korea

出　　处：《Advanced Fiber Materials》2024年第1期158-169,共12页先进纤维材料（英文）

基　　金：supported by(i)the National R&D Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Science and ICT(2021M3D1A2051636);(ii)an NRF funded by the Ministry of Science and ICT(2023M3H4A1A03061436).

摘　　要：Ruthenium phosphide is a promising catalyst for hydrogen evolution due to its cost-effectiveness compared to platinum.However it faces the challenge of having a high binding energy for hydrogen intermediates.In this study,we demonstrate that the incorporation of iridium in ruthenium phosphides lowers the binding energy of hydrogen intermediates,thereby controlling the overpotential and Tafel slope of hydrogen evolution.When the Ir content was doped at 3 at.%,the catalyst achieved an overpotential of 33 mV and a Tafel slope of 33 mV dec^(-1) under acidic conditions,which are similar to those of the benchmark Pt/C catalyst.In situ Raman spectroscopy and density functional theory(DFT)calculations suggest that the enhanced catalytic activity originates from the near-neutral Gibbs free energy of hydrogen adsorption on the hollow site of the iridium cluster implanted onto ruthenium phosphide.

关 键 词：Water electrolysis Ruthenium phosphide Iridium substitution Electronic structure Hydrogen evolution reaction ELECTROSPINNING 

分 类 号：O64[理学—物理化学]