Issue 7, 2019

Ni/NiM2O4 (M = Mn or Fe) supported on N-doped carbon nanotubes as trifunctional electrocatalysts for ORR, OER and HER

Abstract

Rationally designed and synthesized non-noble metal-based multifunctional electrocatalysts with outstanding activity and durability for oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and oxygen reduction reaction (ORR) are critical to the commercialization of energy-related devices. Herein, two trifunctional electrocatalysts composed of Ni–NiM2O4 (M = Mn or Fe) supported on N-doped carbon nanotubes (NCNT) were in situ synthesized by pyrolysis of NiMn- and NiFe-based precursors, respectively, under a NH3/Ar atmosphere. The hybrids exhibit robust trifunctional catalytic performance for HER, OER and ORR in an alkaline electrolyte. Especially, NCNT/Ni–NiMn2O4 exhibits excellent performance for zinc–air batteries with a high specific capacity of 502 mA h g−1 and a maximum power density of 105 mW cm−2, comparable to that of the Pt/C-based zinc–air battery. This study provides a feasible strategy for preparing highly efficient trifunctional electrocatalysts by in situ coupling metal/metal spinel oxide composites with high conductivity nanocarbon.

Graphical abstract: Ni/NiM2O4 (M = Mn or Fe) supported on N-doped carbon nanotubes as trifunctional electrocatalysts for ORR, OER and HER

Supplementary files

Article information

Article type
Paper
Submitted
12 Dec 2018
Accepted
22 Feb 2019
First published
22 Feb 2019

Catal. Sci. Technol., 2019,9, 1595-1601

Ni/NiM2O4 (M = Mn or Fe) supported on N-doped carbon nanotubes as trifunctional electrocatalysts for ORR, OER and HER

Q. Qin, L. Chen, T. Wei, Y. Wang and X. Liu, Catal. Sci. Technol., 2019, 9, 1595 DOI: 10.1039/C8CY02504E

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