Hierarchical microspheres of Co(2)CrO(4) nanoplates for electrocatalytic water oxidation

Date

2020-06-01

Author

Aksoy, Izel
ÇETİN, ASUDE
Nalbant Esentürk, Emren

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Co(2)CrO(4)microspheres were hydrothermally synthesized as new electrocatalyst for water oxidation/oxygen evolution reaction (OER). SEM and TEM analyses revealed the hierarchical morphology of the microspheres which are assembly of nanoplates formed by the assembly of individual nanoparticles with ca. 17 nm size. BET analyses showed that this new material has very large surface area (125 m(2) g(-1)). Co(2)CrO(4)microspheres were then used to modify glassy carbon electrode for electrocatalytic investigations in alkaline medium. The results revealed that this new material has promising catalytic performance toward OER with an onset potential of 1.52 V vs. RHE and an overpotential of 456 mV at 10 mA cm(-2)current density. In addition, the microspheres presented very good stability during long-term constant potential electrolysis. In general, the catalytic performance of Co(2)CrO(4)microspheres is comparable to the one of benchmark RuO(2)with an advantage of being more stable and cost-effective.

Subject Keywords

Modelling and simulation, General materials science, Atomic and molecular physics, and optics, Bioengineering, General chemistry, Condensed matter physics, Water oxidation, Oxygenevolution, Spinel, Co2CrO4, Metal oxide, Nanostructured catalysts

URI

https://hdl.handle.net/11511/38154

Journal

JOURNAL OF NANOPARTICLE RESEARCH

DOI

https://doi.org/10.1007/s11051-020-04907-6

Collections

Department of Chemistry, Article

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Citation Formats

I. Aksoy, A. ÇETİN, and E. Nalbant Esentürk, “Hierarchical microspheres of Co(2)CrO(4) nanoplates for electrocatalytic water oxidation,” JOURNAL OF NANOPARTICLE RESEARCH, pp. 0–0, 2020, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/38154.