3D-Printed Hierarchically Micro-Nano-structured NiFe Catalysts for the Stable and Efficient Oxygen Evolution Reaction

Zhou, Bo1; Tang, Yang2; Jiao, Zhiwei3; Wan, Pingyu2; Hu, Qing4,5; Yang, Xiao Jin1

2023-03-24

10.1021/acsanm.3c00070

ACS APPLIED NANO MATERIALS   Impact Factor & Quartile

2574-0970

The high overpotential of the oxygen evolution reaction (OER) is the main obstacle to water electrolysis for green hydrogen production. NiFe-based materials are the potential non -precious metal electrocatalysts for the OER, but their poor stability and limited activity have been of concern. Herein, a three-dimensional self-supporting NiFe electrode is prepared by direct writing 3D printing using spherical powders of Ni and Fe metals followed by hydrothermal treatment at 130 degrees C in urea and NH4F mixed solution. The fabricated 3D micro-nano-structured NiFe electrode presents an excellent OER activity of 220 mV overpotential to reach 100 mA cm-2 with a Tafel slope of 49.1 mV dec-1 and stability up to 100 h in continuous or intermittent power supply. The hydrothermal treatment produces in situ growth of flower-like clusters of NiFe2O4 nanoneedles wrapped with FeOOH nanosheets on the surface of the 3D NiFe bimetal microsphere network, and the outstanding OER activity is attributed to a wide variety of interfaces and heterojunctions among metal microspheres, metal oxides, and hydroxides. This study provides an approach for preparing high-performance self-supporting electrodes for electrochemical processes.

NiFe catalyst direct writing 3D printing self-supporting micro-nano-structure oxygen evolution reaction

SCI

English

Corresponding

Fundamental Research Funds for the Central Universities[JD2212]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000957956900001

AMER CHEMICAL SOC

Web of Science

1.Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
2.Beijing Univ Chem Technol, Natl Fundamental Res Lab New Hazardous Chem Assess, Beijing 100029, Peoples R China
3.Beijing Univ Chem Technol, Coll Mech & Elect Engn, Beijing 100029, Peoples R China
4.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
5.Beijing Huanding Environm Big Data Inst, Beijing 100083, Peoples R China

Zhou, Bo,Tang, Yang,Jiao, Zhiwei,et al. 3D-Printed Hierarchically Micro-Nano-structured NiFe Catalysts for the Stable and Efficient Oxygen Evolution Reaction[J]. ACS APPLIED NANO MATERIALS,2023,6(6).

Zhou, Bo,Tang, Yang,Jiao, Zhiwei,Wan, Pingyu,Hu, Qing,&Yang, Xiao Jin.(2023).3D-Printed Hierarchically Micro-Nano-structured NiFe Catalysts for the Stable and Efficient Oxygen Evolution Reaction.ACS APPLIED NANO MATERIALS,6(6).

Zhou, Bo,et al."3D-Printed Hierarchically Micro-Nano-structured NiFe Catalysts for the Stable and Efficient Oxygen Evolution Reaction".ACS APPLIED NANO MATERIALS 6.6(2023).