Amber, H.; Balčiūnaitė, A.; Sukackienė, Z.; Tamašauskaitė-Tamašiūnaitė, L.; Norkus, E. Electrolessly Deposited Cobalt-Phosphorous Coatings for Efficient Hydrogen and Oxygen Evolution Reactions. Preprints2024, 2024110177. https://doi.org/10.20944/preprints202411.0177.v1
APA Style
Amber, H., Balčiūnaitė, A., Sukackienė, Z., Tamašauskaitė-Tamašiūnaitė, L., & Norkus, E. (2024). Electrolessly Deposited Cobalt-Phosphorous Coatings for Efficient Hydrogen and Oxygen Evolution Reactions. Preprints. https://doi.org/10.20944/preprints202411.0177.v1
Chicago/Turabian Style
Amber, H., Loreta Tamašauskaitė-Tamašiūnaitė and Eugenijus Norkus. 2024 "Electrolessly Deposited Cobalt-Phosphorous Coatings for Efficient Hydrogen and Oxygen Evolution Reactions" Preprints. https://doi.org/10.20944/preprints202411.0177.v1
Abstract
Hydrogen production by water splitting is one of the low-cost green hydrogen production technologies. The challenge is to develop inexpensive and highly active catalysts. Herein, we present the preparation of electrocatalysts based on cobalt-phosphorus (Co-P) coatings with different P contents for hydrogen and oxygen evolution reactions (HER and OER). The Co-P coatings were deposited on the copper (Cu) surface using the inexpensive and simple method of electroless metal deposition. The morphology, structure, and composition of the Co-P coatings deposited on the Cu surface were studied by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX), while their activity for HER and OER in 1 M KOH was investigated by linear sweep voltammetry (LSVs) and chrono-techniques. It was found that the catalyst activity for both HER and OER depends on the P content of the catalyst and varies to the highest efficiency for each reaction. The Co-P coating with the 11 wt% of P exhibited the lowest overpotential value of –115.4 mV for the HER to obtain a current density of 10 mA cm-2 compared to the Co-P coatings with 8 wt% (–121.5 mV) and 5 wt% (–182.9 mV) of P. In contrast, the lowest OER overpotential (394 mV) was observed for the Co-P coating with the 8 wt% of P to obtain a current density of 10 mA cm-2 as compared to the Co-P coatings with 5 wt% (416 mV) and 11 wt% (432 mV) of P. These results suggest that the obtained catalysts are suitable for HER and OER in alkaline media.
Keywords
cobalt; phosphorous; electroless deposition; water splitting
Subject
Chemistry and Materials Science, Electrochemistry
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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