Titania, zirconia and hafnia supported ruthenium(0) nanoparticles: Highly active hydrogen evolution catalysts

Date

2018-12-01

Author

Demir Arabacı, Elif
Önal, Ahmet Muhtar
Özkar, Saim

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Designing a cost-effective catalyst with high activity and stability for hydrogen evolution reaction (2H(+) + 2e(-) -> H-2) is a big challenge due to increasing demand for energy. Herein, we report the electrocatalytic activity of glassy carbon electrodes with group 4 metal oxides (TiO2, ZrO2, HfO2) supported ruthenium(0) nanoparticles in hydrogen evolution reaction. Electrochemical activity of modified electrodes is investigated by recording linear sweep voltammograms in 0.5 M H2SO4 solution. The results of electrochemical measurements reveal that among the three electrodes the glassy carbon electrode with Ruci/TiO2 (1.20% wt. Ru) exhibits the highest activity with a relatively small Tafel slope of 52 mV dec(-1), the highest exchange current density of 0.728 mA cm(-2), and the smallest overpotential of 41 mV at j = 10 mA cm(-2). Furthermore, it demonstrates superior stability in acidic solution with an unaltered onset potential for long term electrochemical measurement.

Subject Keywords

Colloid and Surface Chemistry, Electronic, Optical and Magnetic Materials, Surfaces, Coatings and Films, Biomaterials

URI

https://hdl.handle.net/11511/38935

Journal

JOURNAL OF COLLOID AND INTERFACE SCIENCE

DOI

https://doi.org/10.1016/j.jcis.2018.07.085

Collections

Department of Chemistry, Article

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Citation Formats

E. Demir Arabacı, A. M. Önal, and S. Özkar, “Titania, zirconia and hafnia supported ruthenium(0) nanoparticles: Highly active hydrogen evolution catalysts,” JOURNAL OF COLLOID AND INTERFACE SCIENCE, pp. 570–577, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/38935.