Efficient tri-metallic oxides NiCo 2 O 4 /CuO for the oxygen evolution reaction.

Autor: Mugheri AQ; Dr M. A. Kazi Institute of Chemistry, University of Sindh Jamshoro 76080 Sindh Pakistan zaffar.ibhupoto@usindh.edu.pk., 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., Bhatti AL; Institute of Physics, University of Sindh Jamshoro 76080 Sindh Pakistan., Memon NN; Dr M. A. Kazi Institute of Chemistry, University of Sindh Jamshoro 76080 Sindh Pakistan zaffar.ibhupoto@usindh.edu.pk., Memon JU; Dr M. A. Kazi Institute of Chemistry, University of Sindh Jamshoro 76080 Sindh Pakistan zaffar.ibhupoto@usindh.edu.pk., Abro MI; Mehran University of Engineering and Technology 7680 Jamshoro Sindh Pakistan., Shah AA; NED University of Engineering Science and Technology Karachi Sindh Pakistan., Willander M; Department of Science and Technology, Campus Norrkoping, Linkoping University SE-60174 Norrkoping Sweden., Hullio AA; Dr M. A. Kazi Institute of Chemistry, University of Sindh Jamshoro 76080 Sindh Pakistan zaffar.ibhupoto@usindh.edu.pk., Ibupoto ZH; Dr M. A. Kazi Institute of Chemistry, University of Sindh Jamshoro 76080 Sindh Pakistan zaffar.ibhupoto@usindh.edu.pk.
Jazyk: angličtina
Zdroj: RSC advances [RSC Adv] 2019 Dec 20; Vol. 9 (72), pp. 42387-42394. Date of Electronic Publication: 2019 Dec 20 (Print Publication: 2019).
DOI: 10.1039/c9ra09351f
Abstrakt: In this study, a simple approach was used to produce nonprecious, earth abundant, stable and environmentally friendly NiCo 2 O 4 /CuO composites for the oxygen evolution reaction (OER) in alkaline media. The nanocomposites were prepared by a low temperature aqueous chemical growth method. The morphology of the nanostructures was changed from nanowires to porous structures with the addition of CuO. The NiCo 2 O 4 /CuO composite was loaded onto a glassy carbon electrode by the drop casting method. The addition of CuO into NiCo 2 O 4 led to reduction in the onset potential of the OER. Among the composites, 0.5 grams of CuO anchored with NiCo 2 O 4 (sample 2) demonstrated a low onset potential of 1.46 V vs. a reversible hydrogen electrode (RHE). A current density of 10 mA cm -2 was achieved at an over-potential of 230 mV and sample 2 was found to be durable for 35 hours in alkaline media. Electrochemical impedance spectroscopy (EIS) indicated a small charge transfer resistance of 77.46 ohms for sample 2, which further strengthened the OER polarization curves and indicates the favorable OER kinetics. All of the obtained results could encourage the application of sample 2 in water splitting batteries and other energy related applications.
Competing Interests: Authors declare no conflict of interest.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE