Nickel-Doped Manganese Dioxide Electrocatalysts with MXene Surface Decoration for Oxygen Evolution Reaction

Authors

Haowei Jia, University of New South Wales, School of Materials Science and Engineering
Peiyuan Guan, University of New South Wales, School of Materials Science and Engineering
Yingze Zhou, University of New South Wales, School of Materials Science and Engineering
Ziheng Feng, University of New South Wales, School of Materials Science and Engineering
Renbo Zhu, University of New South Wales, School of Materials Science and Engineering
Mengyao Li, University of New South Wales, School of Materials Science and Engineering
Tao Wan, University of New South Wales, School of Materials Science and Engineering
Tianxu Huang, University of New South Wales, School of Materials Science and Engineering
Tianyue Liang, University of New South Wales, School of Materials Science and Engineering
Jun Pan, Central South University
Zhipeng Ma, UNSW Sydney
Yeqing Xu, University of Wollongong
Caiyun Wang, University of Wollongong
Dewei Chu, University of New South Wales, School of Materials Science and Engineering

Publication Name

Energy and Fuels

Abstract

Electrochemical water splitting (EWS) has been considered as an ideal strategy to produce renewable hydrogen energy. However, the application of EWS is hindered by its sluggish kinetics of oxygen evolution half-reaction. In this work, we successfully prepared an efficient MXene-Ni0.075Mn0.925O2/CC catalyst for oxygen evolution reaction (OER) enhanced by a novel electrodeposition process. By corroborating from characterization results, the Ni element has been successfully doped into the MnO2crystal. In addition, electron microscopy images visualized that MXene firmly cooperated with the Ni-doped MnO2. With the proper amount of Ni doping in the pristine MnO2, more defects were induced. In addition, the two-dimensional (2D) MXene cooperation collaboratively provided more mass transport channels for OER. Therefore, the prepared MXene-Ni0.075Mn0.925O2/CC catalyst exhibited an outstanding catalytic performance with an overpotential of ?410 mV at a constant current density of 50 mA cm-2, about 105 mV smaller than that of the pristine MnO2/CC catalyst. The proposed electrodeposition method may pave the way for future designing of binder-free electrocatalytic materials for EWS.

Open Access Status

This publication is not available as open access

Volume

36

Issue

22

First Page

13808

Last Page

13816