Ag Nanocluster‐Triggered Lattice Oxygen Activation in Amorphous Sulfide Matrices for Superior Oxygen Evolution
Abstract
ABSTRACT Polymetallic sulfides have emerged as promising electrocatalysts for the oxygen evolution reaction (OER) due to their exceptional compositional tunability and excellent catalytic activity. However, stability is a huge challenge for large‐scale alkaline water electrolysis. In this work, we introduce highly electronegative Ag species together with an amorphous CoWFeNiAgS x (Ag/CWFNAS x ) to substantially enhance both the activity and durability of sulfide‐based catalysts. The integration of Ag induces favorable electron redistribution among adjacent Co, Fe, and Ni centers, downshifting the d‐band center and weakening M─O bonds to trigger a mechanistic transition from AEM to the LOM, thereby lowering the OER barriers. When implemented as the anode in an anion exchange membrane water electrolyzer (AEMWE) device, the catalyst delivers an ultralow cell voltage of 1.87 V at 1 A/cm 2 and exhibits exceptional operational stability with a voltage decay of 0.21 mV/h over 600 h at 60°C. The stability arises from the synergy between the amorphous framework and Ag doping. The framework buffers strain via bond reconfiguration, and Ag doping prevents over‐oxidation and dissolution of the active site. This study highlights a synergistic electronic and structural engineering strategy for achieving highly active and durable sulfide‐based anodes for practical alkaline electrolysis.
Article Details
Authors (10)
Lanfang Wang
Research Institute of Materials Science of Shanxi Normal University & Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education
Jiahe Zhao
School of Materials Science and Engineering Key Laboratory of Magnetic Molecules and Magnetic Information Materials Ministry of Education Research Institute of Materials Science Shanxi Key Laboratory of Advanced Magnetic Materials and Devices Shanxi Normal University Taiyuan China
Hui Zhang
The Fourth Hospital of Hebei Medical University Shijiazhuang China
Yanqing Hao
School of Materials Science and Engineering Key Laboratory of Magnetic Molecules and Magnetic Information Materials Ministry of Education Research Institute of Materials Science Shanxi Key Laboratory of Advanced Magnetic Materials and Devices Shanxi Normal University Taiyuan China
Wenjiao Liu
School of Materials Science and Engineering Key Laboratory of Magnetic Molecules and Magnetic Information Materials Ministry of Education Research Institute of Materials Science Shanxi Key Laboratory of Advanced Magnetic Materials and Devices Shanxi Normal University Taiyuan China
Yujia Li
State Key Laboratory of Advanced Fiber Materials & College of Chemistry and Chemical Engineering
Fang Wang
Luyang Zuo
School of Materials Science and Engineering Key Laboratory of Magnetic Molecules and Magnetic Information Materials Ministry of Education Research Institute of Materials Science Shanxi Key Laboratory of Advanced Magnetic Materials and Devices Shanxi Normal University Taiyuan China
Zhanwu Lei
State Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science
Yang Liu