Electrostatically directed assembly of two-dimensional ultrathin Co2Ni-MOF/Ti3C2Tx nanosheets for electrocatalytic oxygen evolution

Pingping Tan; Rongwei Gao; Yawei Zhang; Ning Han; Yinzhu Jiang; Maowen Xu; Shu-Juan Bao; Xuan Zhang

doi:10.1016/j.jcis.2022.10.109

Electrostatically directed assembly of two-dimensional ultrathin Co2Ni-MOF/Ti₃C₂T_x nanosheets for electrocatalytic oxygen evolution

J Colloid Interface Sci. 2023 Jan 15;630(Pt B):363-371. doi: 10.1016/j.jcis.2022.10.109. Epub 2022 Oct 26.

Authors

Pingping Tan¹, Rongwei Gao², Yawei Zhang³, Ning Han⁴, Yinzhu Jiang⁵, Maowen Xu⁶, Shu-Juan Bao⁷, Xuan Zhang⁸

Affiliations

¹ School of Materials and Energy, Southwest University, Chongqing 400715, PR China; Chongqing Key Lab for Advanced Materials and Clean Energies of Technologies, Southwest University, Chongqing 400715, PR China; ZJU-Hangzhou Global Scientific and Technological Innovation Centre, Zhejiang University, Hangzhou 311200, PR China.
² School of Materials and Energy, Southwest University, Chongqing 400715, PR China; Chongqing Key Lab for Advanced Materials and Clean Energies of Technologies, Southwest University, Chongqing 400715, PR China; Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, Bus 2450, B-3001 Heverlee, Belgium.
³ School of Materials and Energy, Southwest University, Chongqing 400715, PR China; Chongqing Key Lab for Advanced Materials and Clean Energies of Technologies, Southwest University, Chongqing 400715, PR China; Xingchu Century Technology Co., Ltd, Zigong 643030, PR China.
⁴ Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, Bus 2450, B-3001 Heverlee, Belgium.
⁵ ZJU-Hangzhou Global Scientific and Technological Innovation Centre, Zhejiang University, Hangzhou 311200, PR China; School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, PR China.
⁶ School of Materials and Energy, Southwest University, Chongqing 400715, PR China; Chongqing Key Lab for Advanced Materials and Clean Energies of Technologies, Southwest University, Chongqing 400715, PR China. Electronic address: xumaowen@swu.edu.cn.
⁷ School of Materials and Energy, Southwest University, Chongqing 400715, PR China; Chongqing Key Lab for Advanced Materials and Clean Energies of Technologies, Southwest University, Chongqing 400715, PR China.
⁸ ZJU-Hangzhou Global Scientific and Technological Innovation Centre, Zhejiang University, Hangzhou 311200, PR China; Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, Bus 2450, B-3001 Heverlee, Belgium. Electronic address: XuanZhang@kuleuven.be.

PMID: 36332429
DOI: 10.1016/j.jcis.2022.10.109

Abstract

Hydrogen production from water electrolysis is severely restricted by the poor reaction kinetics of oxygen evolution reaction (OER). In this work, a series of two-dimensional (2D) composites MOF/Ti₃C₂T_x (the MXene phase) were fabricated by electrostatically directed assembly and used as catalysts for OER. The obtained composite materials exhibit enhanced electrocatalytic properties, thanks to the ultrathin 2D/2D heterostructure with abundant active sites in Co2Ni-MOF and the high electronic conductivity of Ti₃C₂T_x. Among all the catalysts, Co2Ni-MOF@MX-1 achieved the best oxygen evolution performance with the lowest Tafel slope (51.7 mV dec^-1) and the lowest overpotential (265 mV on carbon paper) at the current density of 10 mA cm^-2. These results demonstrated that the synthesis of 2D composite materials by electrostatically directed assembly could be a feasible and promising method for the preparation of 2D heterostructure catalysts.

Keywords: 2D ultrathin Co2Ni-MOF; Electrostatically directed assembly; Oxygen evolution reaction; Ti(3)C(2)T(x).