A Low Charge Transfer Resistance CuO Composite for Efficient Oxygen Evolution Reaction in Alkaline Media.

Autor: Mugheri AQ; Dr. M.A Kazi Institute of Chemistry University of Sindh Jamshoro, 76080, Sindh Pakistan., Tahira A; Department of Science and Technology, Campus Norrkoping, Linkoping University, SE-60174 Norrkoping, Sweden., Aftab U; Mehran University of Engineering and Technology, 7680 Jamshoro, Sindh Pakistan., Abro MI; Mehran University of Engineering and Technology, 7680 Jamshoro, Sindh Pakistan., Bhatti AL; Institute of Physics University of Sindh Jamshoro, 76080, Sindh Pakistan., Ali S; University of Baluchistan, Quetta, Baluchistan, 87300, Pakistan., Abbasi MA; Institute of Physics University of Sindh Jamshoro, 76080, Sindh Pakistan., Ibupoto ZH; Dr. M.A Kazi Institute of Chemistry University of Sindh Jamshoro, 76080, Sindh Pakistan.
Jazyk: angličtina
Zdroj: Journal of nanoscience and nanotechnology [J Nanosci Nanotechnol] 2021 Apr 01; Vol. 21 (4), pp. 2613-2620.
DOI: 10.1166/jnn.2021.19091
Abstrakt: An efficient, simple, environment-friendly and inexpensive cupric oxide (CuO) electrocatalyst for oxygen evolution reaction (OER) is demonstrated. CuO is chemically deposited on the porous carbon material obtained from the dehydration of common sugar. The morphology of CuO on the porous carbon material is plate-like and monoclinic crystalline phase is confirmed by powder X-ray diffraction. The OER activity of CuO nanostructures is investigated in 1 M KOH aqueous solution. To date, the proposed electrocatalyst has the lowest possible potential of 1.49 V versus RHE (reversible hydrogen electrode) to achieve a current density of 20 mA/cm₂ among the CuO based electrocatalysts and has Tafel slope of 115 mV dec -1 . The electrocatalyst exhibits an excellent long-term stability for 6 hours along with significant durability. The enhanced catalytic active centers of CuO on the carbon material are due to the porous structure of carbon as well as strong coupling between CuO-C. The functionalization of metal oxides or other related nanostructured materials on porous carbon obtained from common sugar provides an opportunity for the development of efficient energy conversion and energy storage systems.
Databáze: MEDLINE