Ultrasonic-Assisted Exfoliation of Graphitic Carbon Nitride and its Electrocatalytic Performance in Process of Ethanol Reforming
- Authors: Chebanenko M.I.1, Zakharova N.V.2, Lobinsky A.A.3, Popkov V.I.1
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Affiliations:
- Ioffe Institute
- Saint-Petersburg State Institute of Technology
- Saint-Petersburg State University
- Issue: Vol 53, No 16 (2019)
- Pages: 2072-2077
- Section: Nanostructures Technology
- URL: https://journals.rcsi.science/1063-7826/article/view/207588
- DOI: https://doi.org/10.1134/S106378261912008X
- ID: 207588
Cite item
Abstract
Graphitic carbon nitride was synthesized via thermolysis of urea and then ultrasonic exfoliated from colloidal solution to obtain phase pure ultrafine powder of g-C3N4. It was shown that ultrasonic-assisted exfoliation of the initial graphitic carbon nitride powder leads to an increase in its phase purity (PXRD), a change in the morphology (SEM), a decrease in the band gap from 2.93 eV to 2.85 eV (DRS) and an increase in the specific surface from 58.6 m2/g to 136.7 m2/g (BET). In addition, it was found that the exfoliated g-C3N4 is an effective catalyst for the process of electrocatalytic reforming – the hydrogen evolution from the water-alcohol solution. Based on volamperometry, it was found that the hydrogen overpotential of graphitic carbon nitride is equal to 249 mV (at 10 mA/cm2), and the Taffel slope is 112 mV/dec. The results of cyclic voltammetry of the electrode based on exfoliated g-C3N4 indicate its high stability, which allows us to consider the exfoliated graphitic carbon nitride as a promising basis of materials for electrocatalytic reforming of alcohols.
About the authors
M. I. Chebanenko
Ioffe Institute
Author for correspondence.
Email: m_chebanenko@list.ru
Russian Federation, St. Petersburg, 194021
N. V. Zakharova
Saint-Petersburg State Institute of Technology
Email: m_chebanenko@list.ru
Russian Federation, St. Petersburg, 190013
A. A. Lobinsky
Saint-Petersburg State University
Email: m_chebanenko@list.ru
Russian Federation, St. Petersburg, 199034
V. I. Popkov
Ioffe Institute
Email: m_chebanenko@list.ru
Russian Federation, St. Petersburg, 194021