High‐Entropy Alloy/Intermetallic Compound Heterostructures for Efficient Hydrazine Oxidation‐Assisted Hydrogen Production
Abstract
Abstract Configuring integrative catalytic heterostructures is an efficient strategy to circumvent the universal linear scaling relationships for accelerating multiple‐intermediate redox reactions. Here this study reports nonprecious metal‐based high‐entropy alloy/intermetallic compound heterostructure with a 3D nanoporous architecture as a high‐performance electrocatalyst for hydrazine oxidation reaction. By making use of strain engineering of hexagonal close‐packed multicomponent intermetallic compound core, high‐entropy NiFeCoCuCrMn alloy surface is comprised of multiple active centers with undulatory adsorption energies, which enable *N 2 H x intermediate spillover to adjust rate‐determining step and lower kinetic barriers. As a consequence of nanoporous architecture endowing abundant multiple active surfaces, this heterostructure mediates hydrazine electrooxidation of as high as ampere‐level current densities at >0.08 V versus reversible hydrogen electrode, showing genuine potential to replace sluggish oxygen evolution reaction for hydrogen production via water electrolysis. Its hydrazine oxidation‐assisted water electrolyser delivers 500 mA cm −2 at ultralow cell voltage of 0.87 V, and maintains exceptional stability for 1000 h.
Article Details
Authors (12)
Hang Shi
Tian‐Yi Dai
Key Laboratory of Automobile Materials (Jilin University) Ministry of Education School of Materials Science and Engineering Jilin University Changchun 130022 China
Xin‐Ying Sun
Key Laboratory of Automobile Materials (Jilin University) Ministry of Education School of Materials Science and Engineering Jilin University Changchun China
Zhi‐Lan Zhou
Key Laboratory of Automobile Materials (Jilin University) Ministry of Education School of Materials Science and Engineering Jilin University Changchun China
Ying Wang
Shu‐Pei Zeng
Key Laboratory of Automobile Materials (Jilin University) Ministry of Education School of Materials Science and Engineering Jilin University Changchun China
Tong‐Hui Wang
Key Laboratory of Automobile Materials (Jilin University) Ministry of Education School of Materials Science and Engineering Jilin University Changchun China
Gao‐Feng Han
Key Laboratory of Automobile Materials (Jilin University) Ministry of Education School of Materials Science and Engineering Jilin University Changchun China
Zi Wen
Key Laboratory of Automobile Materials (Jilin University) Ministry of Education School of Materials Science and Engineering Jilin University Changchun China
Qian‐Rong Fang
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin University Changchun 130012 China
Xing‐You Lang
Key Laboratory of Automobile Materials (Jilin University) Ministry of Education School of Materials Science and Engineering Jilin University Changchun China
Qing Jiang