Low-pressure-plasma-processed NiFe-MOFs/nickel foam as an efficient electrocatalyst for oxygen evolution reaction
Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Journal Volume
47
Journal Issue
85
Pages
35990
Date Issued
2022
Author(s)
Abstract
A NiFe bimetallic metal organic framework (MOF) deposited on nickel foam and processed by low-pressure plasmas with 95%Ar+5%H2, pure Ar, and 95%Ar+5%O2 gases is used as an electrocatalyst for the oxygen evolution reaction. An alkaline solution (1 M KOH) with 95%Ar+5%H2 plasma processed NiFe-MOFs/NF exhibits the best electrocatalytic performance with the lowest overpotential of 149 mV at a current density of 10 mA cm−2 and a Tafel slope of 54 mV dec−1. Furthermore, electrical impedance spectroscopy and cyclic voltammetry show that after 95%Ar+5%H2 plasma treatment, the interfacial impedance greatly reduces, and the electrical double-layer capacitance slightly increased.
Subjects
Oxygen evolution reaction (OER); Plasma; Electrocatalyst; NiFe; Metal organic framework (MOP); METAL-ORGANIC-FRAMEWORK; CATALYSTS
SDGs
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Type
journal article