In Situ Electrodeposition of Ultralow Pt into NiFe-Metal-Organic Framework/Nickel Foam Nanosheet Arrays as a Bifunctional Catalyst for Overall Water Splitting
Jiongting Yin1, Cheng Wang1, Jie Li1, Shudi Yu1, Zhengying Wu2*（吴正颖）, Yangping Zhang1, and Yukou Du1*（杜玉扣）
1College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
2Jiangsu Key Laboratory for Environment Functional Materials, School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou215009,China
3College of Chemical and Environmental Engineering, Yancheng Teachers University, Yancheng 224007, China
Inorg. Chem. 2024, 63, 11, 5167-5174
Abstract: Exploring highly effective bifunctional electrocatalysts with surface structural advantages and synergistic optimization effects among multimetals is greatly important for overall water splitting. Herein, we successfully synthesized Pt-loaded NiFe-metal-organic framework nanosheet arrays grown on nickel foam (Pt–NiFe-MOF/NF) via a facile hydrothermal-electrodeposition process. Benefiting from large exposed specific surface, optimal electrical conductivity and efficient metal-support interaction endow Pt–NiFe-MOF/NF with highly catalytic performance, exhibiting small overpotential of 261 mV toward oxygen evolution reaction and 125 mV toward hydrogen evolution reaction at a current density of 100 mA cm–2 in alkaline medium. More significantly, the assembled water electrolyzer comprising the Pt–NiFe-MOF/NF//Pt–NiFe-MOF/NF couple demands a low cell voltage of 1.45 V to reach 10 mA cm–2. This work renders a viable approach to design dual-functional electrocatalysts with exceptional electrocatalytic activity and stability at high current density, showing the great prospect of water electrolysis for commercial application.
链接：//pubs.acs.org/doi/10.1021/acs.inorgchem.4c00124
