Search
Abstract
Electrocatalytic water splitting for green hydrogen production necessitates effective electrocatalysts. Currently, commercial catalysts are primarily platinum-based. Therefore, finding catalysts with comparable catalytic activity but lower cost is essential. This paper describes spinel-structured catalysts containing nickel cobaltite NiCo2O4, graphene, and additionally doped with heteroatoms. The structure and elemental composition of the obtained materials were analyzed by research methods such as TEM, SEM-EDX, XRD, XPS, and Raman spectroscopy. The electrochemical measurements showed that hybrid materials containing nickel cobaltite NiCo2O4 doped with graphene are highly active catalysts in the hydrogen evolution reaction (Tafel slopes = 91 mV dec−1, overpotential = 468 mV and onset potential = -339 mV), while in the oxygen evolution reaction (Tafel slopes = 51 mV dec−1, overpotential = 1752 mV and onset potential = 370 mV), bare NiCo2O4 without the addition of carbon has a worse activity (for HER: Tafel slopes = 120 mV dec−1, overpotential - does not achieve and onset potential = -404 mV, for OER: Tafel slopes = 54 mV dec−1, overpotential = 1796 mV and onset potential = 410 mV). In terms of stability, comparable results were obtained for each synthesized compound for both the HER and OER reactions.
Citations
-
0
CrossRef
-
0
Web of Science
-
1
Scopus
Authors (7)
-
Laura Kubińska
-
Malgorzata Skorupska
-
Patrycja Grabowska
-
Marta Gajewska
-
Jerzy P. Lukaszewicz
-
Anna Ilnicka
Cite as
Full text
full text is not available in portal
Keywords
Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
Scientific Reports
no. 14,
ISSN: 2045-2322 - Language:
- English
- Publication year:
- 2024
- Bibliographic description:
- Kubińska L., Szkoda M., Skorupska M., Grabowska P., Gajewska M., Lukaszewicz J. P., Ilnicka A.: Combined effect of nitrogen-doped carbon and NiCo2O4 for electrochemical water splitting// Scientific Reports -,iss. 1 (2024),
- DOI:
- Digital Object Identifier (open in new tab) 10.1038/s41598-024-74031-1
- Sources of funding:
-
- The research leading to these results has received funding from the Norway Grants 2014–2021 via the National Centre for Research and Development. This work was carried out as a result of the research project no. NOR/SGS/IL-HYDROGEN/0202/2020-00
- Verified by:
- Gdańsk University of Technology
seen 31 times
Recommended for you
Investigating BiMeVOx compounds as potential photoelectrochemical and electrochemical materials for renewable hydrogen production
- M. Szkoda,
- M. Skorupska,
- P. Grabowska
- + 2 authors
Modification of TiO2 nanotubes by graphene–strontium and cobalt molybdate perovskite for efficient hydrogen evolution reaction in acidic medium
- M. Szkoda,
- A. Ilnicka,
- M. Skorupska
- + 2 authors
The impact of graphene on the electrochemical performance of BiMeVOx catalysts in water splitting
- P. Grabowska,
- M. Szkoda,
- M. Skorupska
- + 2 authors
Powering the Future by Iron Sulfide Type Material (FexSy) Based Electrochemical Materials for Water Splitting and Energy Storage Applications: A Review
- A. Farhan,
- W. Qayyum,
- U. Fatima
- + 7 authors