Embedded Ir─Ru Single‐Atom Alloy with Self‐Limiting Motifs for Sustainable Proton Exchange Membrane Water Electrolysis
Abstract
Abstract Designing acid‐stable anodic electrocatalysts with low noble‐metal loading is essential for the industrial‐scale application of proton exchange membrane water electrolysis (PEMWE). However, existing catalyst systems struggle to fully utilize the intrinsic properties of active sites. Here, a precisely engineered nanocatalyst is unveiled through a hierarchical atomic assembly strategy for synthesis, featuring an ultralow‐content Ir─Ru single‐atom alloy integrated into robust titanium dioxide nanowires (Ir 1 Ru/TiO 2 ). This lattice‐embedded structure induces the support to reduce the dissolution and excessive oxidation of Ru/Ir sites through strong interfacial coupling, significantly enhancing the corrosion resistance of catalysts. Moreover, atomically dispersed Ir induces the formation of uniquely shortened Ru─O ligand bonds, serving as stable self‐limiting motifs, in contrast to the conventional formation of amorphous oxide layers. The Ir 1 Ru/TiO 2 catalyst showcases an initial mass activity of 1971.5 A , enabling stable operation at 10 mA cm −2 for over 3200 h and at the rated current density of 2 A cm −2 for 2000 h in PEMWE.
Article Details
Authors (17)
Shaoxiong Li
College of Materials Science and Technology
Liming Deng
College of Materials Science and Technology
Sung‐Fu Hung
Department of Applied Chemistry National Yang Ming Chiao Tung University Hsinchu Taiwan
Sheng Zhao
College of Materials Science and Technology
Luqi Wang
Confucius Energy Storage Lab, School of Energy and Environment & Z Energy Storage Center
Yixin Hao
Yongde Long
State Key Laboratory of Materials Low‐Carbon Recycling College of Materials Science and Engineering Beijing University of Technology Chaoyang District Beijing 100124 China
Boyuan Li
Frontiers Science Center for New Organic Matter, State Key Laboratory of Advanced Chemical Power Sources, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Academy of Advanced Inter Disciplinary Studies, College of Chemistry
Yung‐Hsi Hsu
Department of Applied Chemistry and Center for Emergent Functional Matter Science National Yang Ming Chiao Tung University Hsinchu 300 Taiwan
Yi‐Yu Chen
Department of Applied Chemistry National Yang Ming Chiao Tung University Hsinchu 300 Taiwan
Ying Zhang
Tsung‐Yi Chen
Feng Hu
Department of Chemistry, Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education)
Linlin Li
College of Materials Science and Technology
Yuxiang Hu
Yuping Wu
Confucius Energy Storage Lab, School of Energy and Environment & Z Energy Storage Center
Shengjie Peng
Confucius Energy Storage Lab, School of Energy and Environment & Z Energy Storage Center