Investigation of hydrogen evolution reaction on ZnO/rGO
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The hydrogen evolution reaction (HER) is one of the indispensable parts of the water splitting process and is increasingly being researched [1]. The main goal of this study was to enhance the electrochemical properties of nanostructured zinc oxide (ZnO) particles toward HER. In order to enhance their electrochemical properties, ZnO nanoparticles were precipitated onto graphene oxide (GO) to form a ZnO/GO composite which was in situ reduced before electrochemical measurements toward HER.
A composite of ZnO/GO (0.1 and 0.5 wt.%) was synthesized using a microwave processing of a precipitate. X-ray diffraction analysis (XRD), Raman spectroscopy, and field emission scanning electron microscopy (FESEM) were used to investigate the structural and morphological characteristics of composite materials. The diffractograms showed narrow reflections with relatively high intensities, which implies high crystallinity of composite materials. Raman spectra of ZnO/GO_0.5 shows a higher intensity D- and... G-bands, attributed to GO, than ZnO/GO_0.1 confirming a larger amount of graphene oxide. FESEM images of composite samples show nanostructured particles. Before HER measurements, the electrode prepared by a mixture of ZnO/GO composite, nafion and ethanol/water solvent, was in situ reduced at potential -1.4 V in 0.1 M KCl to get ZnO/rGO. HER activity was investigated in NaOH by linear voltammetry. ZnO/rGO_0.5 showed increased electrochemical activity as a result of the evolution of hydrogen starting earlier and the higher current density.
Keywords:
hydrogen evolution reaction / electrochemical properties / zinc oxide / ZnO / graphene oxideSource:
Book of abstracts / 9th Conference of the Young Chemists of Serbia, 4th November 2023, Novi Sad, 2023, 114-114Publisher:
- Belgrade : Serbian Chemical Society
- Belgrade : Serbian Young Chemists Club
Funding / projects:
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200175 (Institute of Technical Sciences of SASA, Belgrade) (RS-MESTD-inst-2020-200175)
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200146 (University of Belgrade, Faculty of Physical Chemistry) (RS-MESTD-inst-2020-200146)
URI
https://dais.sanu.ac.rs/123456789/16166https://www.shd.org.rs/wp-content/uploads/2023/11/9CYCS_Book-of-Abstracts.pdf
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - CONF AU - Kratovac, Marija AU - Aleksić, Katarina AU - Marković, Smilja AU - Stojković Simatović, Ivana PY - 2023 UR - https://dais.sanu.ac.rs/123456789/16166 UR - https://www.shd.org.rs/wp-content/uploads/2023/11/9CYCS_Book-of-Abstracts.pdf AB - The hydrogen evolution reaction (HER) is one of the indispensable parts of the water splitting process and is increasingly being researched [1]. The main goal of this study was to enhance the electrochemical properties of nanostructured zinc oxide (ZnO) particles toward HER. In order to enhance their electrochemical properties, ZnO nanoparticles were precipitated onto graphene oxide (GO) to form a ZnO/GO composite which was in situ reduced before electrochemical measurements toward HER. A composite of ZnO/GO (0.1 and 0.5 wt.%) was synthesized using a microwave processing of a precipitate. X-ray diffraction analysis (XRD), Raman spectroscopy, and field emission scanning electron microscopy (FESEM) were used to investigate the structural and morphological characteristics of composite materials. The diffractograms showed narrow reflections with relatively high intensities, which implies high crystallinity of composite materials. Raman spectra of ZnO/GO_0.5 shows a higher intensity D- and G-bands, attributed to GO, than ZnO/GO_0.1 confirming a larger amount of graphene oxide. FESEM images of composite samples show nanostructured particles. Before HER measurements, the electrode prepared by a mixture of ZnO/GO composite, nafion and ethanol/water solvent, was in situ reduced at potential -1.4 V in 0.1 M KCl to get ZnO/rGO. HER activity was investigated in NaOH by linear voltammetry. ZnO/rGO_0.5 showed increased electrochemical activity as a result of the evolution of hydrogen starting earlier and the higher current density. PB - Belgrade : Serbian Chemical Society PB - Belgrade : Serbian Young Chemists Club C3 - Book of abstracts / 9th Conference of the Young Chemists of Serbia, 4th November 2023, Novi Sad T1 - Investigation of hydrogen evolution reaction on ZnO/rGO SP - 114 EP - 114 UR - https://hdl.handle.net/21.15107/rcub_dais_16166 ER -
@conference{ author = "Kratovac, Marija and Aleksić, Katarina and Marković, Smilja and Stojković Simatović, Ivana", year = "2023", abstract = "The hydrogen evolution reaction (HER) is one of the indispensable parts of the water splitting process and is increasingly being researched [1]. The main goal of this study was to enhance the electrochemical properties of nanostructured zinc oxide (ZnO) particles toward HER. In order to enhance their electrochemical properties, ZnO nanoparticles were precipitated onto graphene oxide (GO) to form a ZnO/GO composite which was in situ reduced before electrochemical measurements toward HER. A composite of ZnO/GO (0.1 and 0.5 wt.%) was synthesized using a microwave processing of a precipitate. X-ray diffraction analysis (XRD), Raman spectroscopy, and field emission scanning electron microscopy (FESEM) were used to investigate the structural and morphological characteristics of composite materials. The diffractograms showed narrow reflections with relatively high intensities, which implies high crystallinity of composite materials. Raman spectra of ZnO/GO_0.5 shows a higher intensity D- and G-bands, attributed to GO, than ZnO/GO_0.1 confirming a larger amount of graphene oxide. FESEM images of composite samples show nanostructured particles. Before HER measurements, the electrode prepared by a mixture of ZnO/GO composite, nafion and ethanol/water solvent, was in situ reduced at potential -1.4 V in 0.1 M KCl to get ZnO/rGO. HER activity was investigated in NaOH by linear voltammetry. ZnO/rGO_0.5 showed increased electrochemical activity as a result of the evolution of hydrogen starting earlier and the higher current density.", publisher = "Belgrade : Serbian Chemical Society, Belgrade : Serbian Young Chemists Club", journal = "Book of abstracts / 9th Conference of the Young Chemists of Serbia, 4th November 2023, Novi Sad", title = "Investigation of hydrogen evolution reaction on ZnO/rGO", pages = "114-114", url = "https://hdl.handle.net/21.15107/rcub_dais_16166" }
Kratovac, M., Aleksić, K., Marković, S.,& Stojković Simatović, I.. (2023). Investigation of hydrogen evolution reaction on ZnO/rGO. in Book of abstracts / 9th Conference of the Young Chemists of Serbia, 4th November 2023, Novi Sad Belgrade : Serbian Chemical Society., 114-114. https://hdl.handle.net/21.15107/rcub_dais_16166
Kratovac M, Aleksić K, Marković S, Stojković Simatović I. Investigation of hydrogen evolution reaction on ZnO/rGO. in Book of abstracts / 9th Conference of the Young Chemists of Serbia, 4th November 2023, Novi Sad. 2023;:114-114. https://hdl.handle.net/21.15107/rcub_dais_16166 .
Kratovac, Marija, Aleksić, Katarina, Marković, Smilja, Stojković Simatović, Ivana, "Investigation of hydrogen evolution reaction on ZnO/rGO" in Book of abstracts / 9th Conference of the Young Chemists of Serbia, 4th November 2023, Novi Sad (2023):114-114, https://hdl.handle.net/21.15107/rcub_dais_16166 .