Abstract
A novel Li1.05Ni0.5Mn1.40Ce0.10O4 compound has directly developed at 900˚C without requiring low-temperature or lowering gas treatments. TEM images illustrate a transparent increase in the surface area. A typical high-temperature calcination technique has a considerable effect on the crystal structure in terms of cation ordering degree and Mn3+ concentration. Interesting properties are displayed by the obtained Li1.05Ni0.5Mn1.40Ce0.10O4 has the best performance in oxygen vacancy defect-dependent activity. Methanol oxidation reaction using four electrons alkaline solution reaction chains work may open a simple route to designing the spinel Li1.05Ni0.5Mn1.40Ce0.10O4 with the tunable oxygen vacancies defect to speed up different electrochemical reactions in fuel cells and other applications. In a 1 M KOH aqueous electrolyte, Li1.05Ni0.5Mn1.40Ce0.10O4 showed current densities of 320 mAcm−2 at 5 mV overpotentials and a low Tafel slope of 108 mV dec−1. Considering this, the recently constructed Li1.05Ni0.5Mn1.40Ce0.10O4 spinel has unique electrocatalytic properties toward methanol oxidation with a high mass, specific activity, a large electrochemically active surface area, and better long-term stability.
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