The effect of MgO additive on the g-C3N4 performance in electrochemical reforming of water-ethanol solution
https://doi.org/10.17586/2220-8054-2020-11-4-474-479
Abstract
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.
About the Authors
M. I. ChebanenkoRussian Federation
St. Petersburg, 194021
K. D. Martinson
Russian Federation
St. Petersburg, 194021
I. V. Matsukevich
Belarus
Minsk BY-220072
V. I. Popkov
Russian Federation
St. Petersburg, 194021
References
1. Yuan Y., Ruan L., Barber J., Joachim Loo S.C., Xue C., Hetero-nanostructured suspended photocatalysts for solar-to-fuel conversion. Energy Environ. Sci., 2014, 7, P. 3934–3951.
2. Cao S., Low J., Yu J., Jaroniec M. Polymeric photocatalysts based on graphitic carbon nitride. Adv. Mater., 2015, 27, P. 2150–2176.
3. Wang X., Maeda K., Thomas A., Takanabe K., Xin G., Carlsson J.M., Domen K., Antonietti M. A metal-free polymeric photocatalyst for hydrogen production from water under visible light. Nat. Mater., 2009, 8, P. 76–80.
4. Mishra A., Mehta A., Basu S., Shetti N.P., Reddy K.R., Aminabhavi T.M. Graphitic carbon nitride (g-C3N4)-based metal-free photocatalysts for water splitting: A review. Carbon, 2009, 149, P. 693–721.
5. Wen J., Xie J., Chen X., Li X., A review on g-C3N4-based photocatalysts. Appl. Surf. Sci., 2017, 391, P. 72–123.
6. Sudhaik A., Raizada P., Shandilya P., Jeong D.Y., Lim J.H., Singh P. Review on fabrication of graphitic carbon nitride based efficient nanocomposites for photodegradation of aqueous phase organic pollutants. J. Ind. Eng. Chem., 2018, 67, P. 28–51.
7. Mao N., Jiang J.-X., MgO/g-C3N4 nanocomposites as efficient water splitting photocatalysts under visible light irradiation. Appl. Surf. Sci., 2019, 476, P. 144–150.
8. Chaudhary P., Ingole P.P. In-Situ solid-state synthesis of 2D/2D interface between Ni/NiO hexagonal nanosheets supported on g-C3N4 for enhanced photo-electrochemical water splitting. International Journal of Hydrogen Energy, 2020, 45(32), P. 16060–16070.
9. Chebanenko M.I., Zakharova N.V., Lobinsky A.A., Popkov V.I. Ultrasonic-Assisted Exfoliation of Graphitic Carbon Nitride and its Electrocatalytic Performance in Process of Ethanol Reforming. Semiconductors, 2019, 53(16), P. 28–33.
10. Chebanenko M.I., Zakharova N.V., Popkov V.I., Synthesis and Visible-Light Photocatalytic Activity of Graphite-like Carbon Nitride Nanopowders. Russ. J. Appl. Chem., 2020, 93(4), P. 494–501.
11. Nikolic V.M., Maslovara S.L., Tasic G.S., et al. Kinetics of hydrogen evolution reaction in alkaline electrolysis on a Ni cathode in the presence of Ni-Co-Mo based ionic activators. Appl. Catal. B Environ., 2015, 179, P. 88–94.
12. Thomas S., Medhekar N.V., Frankel G.S., Birbilis N. Corrosion mechanism and hydrogen evolution on Mg. Curr. Opin. Solid St. M., 2015, 19(2), P. 85–94.
13. Kodintsev I.A., Martinson K.D., Lobinsky A.A., Popkov V.I. SILD synthesis of the efficient and stable electrocatalyst based on CoO–NiO solid solution toward hydrogen production. Nanosystems: Phys. Chem. Math., 2019, 10(6), P. 681–685.
14. Dmitriev D.S., Nashchekin A.V., Popkov V.I. The interfacial surface of an electrode for a supercapacitor as a factor affecting the capacitance and energy density. Appl. Surf. Sci., 2020, 501, P. 144216.
Review
For citations:
Chebanenko M.I., Martinson K.D., Matsukevich I.V., Popkov V.I. The effect of MgO additive on the g-C3N4 performance in electrochemical reforming of water-ethanol solution. Nanosystems: Physics, Chemistry, Mathematics. 2020;11(4):474–479. https://doi.org/10.17586/2220-8054-2020-11-4-474-479