Cobalt and Nitrogen Codoped Carbon Nanosheets Templated from NaCl as Efficient Oxygen Reduction Electrocatalysts

Abstract

The oxygen reduction reaction (ORR) in a cathode is an essential component of many electrochemical energy storage and conversion systems. Two-dimensional materials are beneficial for electron conduction and mass transport with high density, showing prominent electrochemical catalytic performance towards the ORR. Herein, a simple NaCl-assisted method to synthesize cobalt-nitrogen-doped carbon materials (CoNC), which present prominent performance towards the ORR in alkaline media, is described. The utilization of the NaCl template endows the product with a large specific surface area of 556.4 m g , as well as good dispersion of cobalt nanoparticles. CoNC-800@NaCl (800 indicates the calcination temperature in °C) displays an excellent onset potential of 0.94 V (vs. a reversible hydrogen electrode), which is close to that of commercial Pt/C. Additionally, CoNC-800@NaCl also exhibits better long-term durability and methanol tolerance than that of Pt/C. The high-performance CoNC-800@NaCl catalyst provides a hopeful alternative to noble-metal catalysts for the ORR in practical applications.

Natrium Karbonat : Termodinamika dan Transport Ion

“…mengalami persaingan dengan proses Solvay. Diawal tahun 1800-an, penyelidikan dilakukan pada industri tersebut yaitu dilakukannya reaksi dekomposisi ganda antara NaCl (47)(48)(49)(50)(51)(52)(53)(54)(55) dengan NH 4 HCO 3 , namun tidak berhasil. Pada akhirnya Ernest solvay Belgia (1838 -1932) membawa perkembangan proses Solvay ini ketitik kesuksesan yaitu pada tahun1861 -1865.…”

FeNi Nanoparticles Coated on N‐doped Ultrathin Graphene‐like Nanosheets as Stable Bifunctional Catalyst for Zn‐Air Batteries

“…However, the OER/ORR acts out tardive kinetics that originate from the coupled multi‐electron and multi‐proton O 2 reduction/evolution processes, leading to inefficiency and a high overpotential [2] . How to mediate the OER and ORR activity of catalyst has become a poser to be solved in research of metal‐air battery, especially in Zn‐air battery [3,4] . So far ruthenium‐based catalysts such as RuO 2 are effective for OER, while Platinum‐based catalysts such as Pt/C are excellent catalysts for ORR [5,6] .…”

Metal‐containing Ionic Liquid/Polyacrylonitrile‐derived Carbon Nanofibers for Oxygen Reduction Reaction and Flexible Zn–Air Battery

“…However, at the center of their high‐level development stands a core stumbling block: oxygen reduction reaction (ORR). The sluggish kinetics of ORR significantly hinders the advancement of numerous promising energy‐conversion devices, especially Zn–air batteries . Up to now, various electrocatalysts have been investigated to boost ORR towards a sustainable and efficient future, particularly of Pt‐based catalysts.…”