Interface Coordination Engineering of P-Fe<sub>3</sub>O<sub>4</sub>/Fe@C Derived from an Iron-Based Metal Organic Framework for pH-Universal Water Splitting
Minmin Fan,
Peixiao Li,
Baibai Liu,
Yun Gong,
Chengling Luo,
Kun Yang,
Xinjuan Liu,
Jinchen Fan,
Yuhua Xue
Affiliations
Minmin Fan
School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China
Peixiao Li
Beijing Smartchip Microelectronics Technology Company Limited, Beijing 102200, China
Baibai Liu
Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education), College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China
Yun Gong
School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China
Chengling Luo
School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China
Kun Yang
School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China
Xinjuan Liu
School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China
Jinchen Fan
School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China
Yuhua Xue
School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China
Developing electrocatalysts with high energy conversion efficiency is urgently needed. In this work, P-Fe3O4/Fe@C electrodes with rich under-coordinated Fe atom interfaces are constructed for efficient pH-universal water splitting. The introduction of under-coordinated Fe atoms into the P-Fe3O4/Fe@C interface can increase the local charge density and polarize the 3d orbital lone electrons, which promotes water adsorption and activation to release more H*, thus elevating electrocatalytic activity. As a donor-like catalyst, P-Fe3O4/Fe@C displays excellent electrocatalytic performance with overpotentials of 160 mV and 214 mV in acidic and alkaline electrolytes at 10 mA cm−2, in addition to pH-universal long-term stability.
