1. Engineered CoS/Ni 3 S 2 Heterointerface Catalysts Grown Directly on Carbon Paper as an Efficient Electrocatalyst for Urea Oxidation.
- Author
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Aladeemy, Saba A., Arunachalam, Prabhakarn, Al-Mayouf, Abdullah M., Sudha, P. N., Rekha, A., Vidhya, A., Hemapriya, J., Latha, Srinivasan, Prasad, P. Supriya, Pavithra, S., Arunadevi, Raja, and Hameed, Salah T.
- Subjects
NICKEL electrodes ,ELECTRODE potential ,CARBON paper ,ENERGY conversion ,WASTEWATER treatment ,NICKEL sulfide - Abstract
Developing highly efficient and stable electrocatalysts for urea electro-oxidation reactions (UORs) will improve wastewater treatment and energy conversion. A low-cost cobalt sulfide-anchored nickel sulfide electrode (CoS/Ni
3 S2 @CP) was synthesized by electrodeposition in DMSO solutions and found to be highly effective and long-lasting. The morphology and composition of catalyst surfaces were examined using comprehensive physicochemical and electrochemical characterization. Specifically, CoS/Ni3 S2 @CP electrodes require a potential of 1.52 volts for a 50 mA/cm2 current, confirming CoS in the heterointerface CoS/Ni3 S2 @CP catalyst. Further, the optimized CoS/Ni3 S2 @CP catalyst shows a decrease of 100 mV in the onset potential (1.32 VRHE ) for UORs compared to bare Ni3 S2 @CP catalysts (1.42 VRHE ), demonstrating much greater performance of UORs. As compared to Ni3 S2 @CP, CoS/Ni3 S2 @CP exhibits twofold greater UOR efficiency as a result of a larger electroactive surface area. The results obtained indicate that the synthetic CoS/Ni3 S2 @CP catalyst may be a favorable electrode material for managing urea-rich wastewater and generating H2 . [ABSTRACT FROM AUTHOR]- Published
- 2024
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