Journal
ELECTROCHIMICA ACTA
Volume 339, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2020.135886
Keywords
FeCoNi alloy; N-CNTs; Metal-C/N-x; Graphitic carbon; OER
Categories
Funding
- Jiangsu Provincial Key Research and Development Program [BE2016648]
- Youth Science and Technology Talents Enrollment Project of the Jiangsu Association of Science and Technology
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [19KJA430020]
- Analysis and Testing center, school of Materials and Chemical Engineering of Xuzhou University of Technology
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The development of highly active and low-cost electrocatalysts toward oxygen evolution reaction (OER), especially the non-noble metal electrocatalysts with well-defined nanostructures, is of great significance for the practical application in metal-air batteries and overall water splitting. Herein, we report a simple pyrolysis method to construct the ternary FeCoNi alloy nanoparticles that encapsulated with bamboo-like N-doped carbon nanotubes (N-CNTs). By combining the advantages of FeCoNi alloy with N-CNTs, the as-fabricated FeCoNi@N-CNTs have large active surface area, ultrahigh content of graphitic carbon, and abundant active metal-C/N-x species to show better electrocatalytic performance for OER in alkaline media. The optimized Fe1Co1Ni1@N-CNTs displays perfect electrocatalytic performance toward OER with an unexpectedly small onset potential of 1.43 V and an ultralow overpotential of 249 mV at 10 mA cm(-2), as well as remarkable long-time stability in alkaline media. More importantly, by coupling Fe1Co1Ni1@N-CNTs as the anode electrode, our previous reported Fe1Co3Mo3 P-O as cathode electrode, a potential of only 1.62 V is needed to drive the water electrolysis to reach to the current density of 10 mA cm(-2), comparable to the state-of-the-art IrO2 parallel to Pt/C couple. This work provides new perspectives for constructing efficient and stable N-CNTs encapsulated non-precious metal electrocatalysts for OER. (C) 2020 Elsevier Ltd. All rights reserved.
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