AI Article Synopsis
- A cobalt triphenylcorrole (CorCo) was chemically attached to graphene oxide (GO) to create a new material called GO-CorCo, which was analyzed using various spectroscopy and microscopy techniques.
- The electrocatalytic performance of GO-CorCo for the oxygen reduction reaction (ORR) was tested in different alkaline and acidic solutions, using specialized electrochemical methods.
- The findings revealed that GO-CorCo can effectively act as a catalyst for oxygen reduction, yielding either a 2-electron or 4-electron process based on the acidity of the solution used.
Article Abstract
A cobalt triphenylcorrole (CorCo) was covalently bonded to graphene oxide (GO), and the resulting product, represented as GO-CorCo, was characterized by UV-vis, FT-IR, and micro-Raman spectroscopy as well as by HRTEM, TGA, XRD, XPS, and AFM. The electrocatalytic activity of GO-CorCo toward the oxygen reduction reaction (ORR) was then examined in air-saturated 0.1 M KOH and 0.5 M HSO solutions by cyclic voltammetry and linear sweep voltammetry using a rotating disk electrode and/or a rotating ring-disk electrode. An overall 4-electron reduction of O is obtained in alkaline media while under acidic conditions a 2-electron process is seen. The ORR results thus indicate that covalently bonded GO-CoCor can be used as a selective catalyst for either the 2- or 4-electron reduction of oxygen, the prevailing reaction depending upon the acidity of the solution.
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| http://dx.doi.org/10.1021/acs.inorgchem.7b00936 | DOI Listing |
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