首页|Manganese decoration tailored nitrogen doping for boosted oxygen reduction electrocatalysis of Co-NC
Manganese decoration tailored nitrogen doping for boosted oxygen reduction electrocatalysis of Co-NC
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NSTL
Elsevier
? 2022 Elsevier B.V.Increasing the oxygen reduction reaction (ORR) electrocatalytic performance of cobalt-nitrogen carbon (Co-NC) materials is highly desired for promoting their widespread application. Yet, it remains challenging due to the existence of activity gap between Co-NC and commercial Pt/C catalyst. Herein, an in-situ decoration strategy was proposed to construct a series of manganese tailored Co-NC (CoxMn-NC, where x represents the molar ratio of Co/Mn) electrocatalysts, which not only increased the content of active metal-Nx sites but also enhanced the graphitized degree of carbon skeleton. The optimal Co0.2Mn-NC exhibited higher half-wave potentials (0.868 V; 0.594 V) than Pt/C (0.838 V; 0.580 V) and robust catalytic stability in alkaline and neutral electrolytes, which was attributed to the tailored nitrogen doping and enhanced graphitized degree. Impressively, a magnesium-air battery driven by Co0.2Mn-NC exhibited better discharging performance than one driven by Pt/C, with a high open circuit voltage (1.61 V), a large peak power density of 83.17 mW cm?2, and a long discharge time of> 87 h at 20 mA cm?2. This work highlighted the promising potential of Mn decorated Co-NC for ORR related energy conversion.
Magnesium-air batteryManganese decoration Co-N-CMetal-Nx active sitesOxygen reduction reaction
Guangxi Key Laboratory of Low Carbon Energy Materials Guangxi New Energy Ship Battery Engineering Technology Research Center Guangxi Scientific and Technological Achievements Transformation Pilot Research Base of Electrochemical Energy Materials and Devic
NSTL
Elsevier
