najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2020-11-4-474-479najo-417Research ArticleCHEMISTRY AND MATERIALS SCIENCEХИМИЯ И НАУКА О МАТЕРИАЛАХThe effect of MgO additive on the g-C3N4 performance in electrochemical reforming of water-ethanol solutionChebanenkoM. I.

St. Petersburg, 194021

m_chebanenko@list.ruMartinsonK. D.

St. Petersburg, 194021

MatsukevichI. V.

Minsk BY-220072

PopkovV. I.

St. Petersburg, 194021

Ioffe InstituteRussian FederationInstitute of General and Inorganic Chemistry of the National Academy of Sciences of BelarusBelarus202029072025114474–479Copyright © Chebanenko M.I., Martinson K.D., Matsukevich I.V., Popkov V.I., 20252025Chebanenko M.I., Martinson K.D., Matsukevich I.V., Popkov V.I.Chebanenko M.I., Martinson K.D., Matsukevich I.V., Popkov V.I.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/417

In this work, a simple wet-chemical route was proposed to synthesize g-C3N4/MgO (5% wt.) with enhanced electrocatalytic activity toward hydrogen evolution from water-ethanol (10% vol.) solution. It was found that synthesized nanocomposite is a single phase and chemically pure, consisting of graphitic carbon nitride (g-C3N4) and cubic magnesium oxide (MgO, periclase) with an average crystallite size of 15.5 nm and 9.5 nm, respectively. It was shown that magnesia nanoparticles are evenly distributed on the surface of g-C3N4 nanosheets and uniform distribution of components is observed over the nanocomposite volume. It was found that this feature leads to an improvement in the electrocatalytic characteristics of the synthesized nanocomposite. So, the g-C3N4/MgO-coated electrode has an overpotential of −251 mV, which is better than for a g-C3N4coated (−264 mV) or pure nickel (−293 mV) electrode. Moreover, the nanocomposite-based electrode posses a low Tafel slope (−106.7 mV/dec) and high cyclic and chronopotentiometry stability.

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The authors declare that there are no conflicts of interest present.