NiMn2O4-based Ni-Mn bimetallic oxides as electrocatalysts for the oxygen reduction reaction in Al
By Deng, Jiayao; Lu, Huimin; Xu, Binbin; Cao, Yuan; Yang, Wenwen; Liu, Jianxue
Published in Chemical Engineering Journal
Chemical Engineering Journal
2020
Abstract
To date, research on air battery catalysts has been mainly focused on finding materials with a high oxygen reduction reaction (ORR) catalytic activity. However, the high cost of platinum catalysts restricts their commercialization. Herein, we report a simple hydrothermal-calcination method to fabricate low-cost NiMn2O4 -based Ni-Mn bimetallic oxides. The Ni-Mn-600 sample showed a high onset potential (1.01 V vs. RHE), which was more positive than that for 20 wt% Pt/C (0.97 V vs. RHE), and its half-wave potential (0.78 V vs. RHE) was comparable to that for 20 wt% Pt/C (0.84 V vs. RHE). Moreover, Ni-Mn-600 as an Al-air battery air