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

Date

2020-06-01

Author

Aksoy, Izel
ÇETİN, ASUDE
Nalbant Esentürk, Emren

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

73
views

0
downloads

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

Suggestions

OpenMETU
Core

Activated carbon-supported CuO nanoparticles: a hybrid material for carbon dioxide adsorption Boruban, Cansu; Nalbant Esentürk, Emren (Springer Science and Business Media LLC, 2018-02-28) Activated carbon-supported copper(II) oxide (CuO) nanoparticles were synthesized by simple impregnation method to improve carbon dioxide (CO2) adsorption capacity of the support. The structural and chemical properties of the hybrid material were characterized by scanning electron microscopy (SEM), energy dispersive X-ray (EDX), X-ray diffraction (XRD), Xray photoelectron spectroscopy (XPS), atomic absorption spectroscopy (AAS), and Brunauer-Emmett-Teller (BET) analyses. The analyses showed that CuO nanopart...
Synthesis and optical properties of fused aromatic thienopyrazine based pi-conjugated polymers Kolay, Merve; Tarkuc, Simge; Udum, Yasemin Arslan; Toppare, Levent Kamil (IOP Publishing, 2011-07-01) Two new polythieno[3,4-b]pyrazine derivatives, poly-10,12-bis(4-hexylthiophen-2-yl)dibenzo[f,h]thieno[3,4-b]quinoxaline (PDBTQ) and poly-8,10-bis(4-hexylthiophen-2-yl)acenaphtho[1,2-b]thieno[3,4-e]pyrazine (PATP) were synthesized by electrochemical polymerization and their electrochemical properties reported. Electroactivity of the monomer and electrochemical redox behavior of its polymers were investigated by cyclic voltammetry. Spectroelectrochemical analysis was performed and the band gaps of the polymer...
Active carbon/graphene hydrogel nanocomposites as a symmetric device for supercapacitors ATEŞ, MURAT; Cinar, Damla; Caliskan, Sinan; GEÇGEL, ÜNAL; ÜNER, OSMAN; BAYRAK, YÜKSEL; Candan, Idris (Informa UK Limited, 2016-01-01) Activated carbons (ACs) are successfully synthesized from Elaeagnus grain by a simple chemical synthesis methodology and demonstrated as novel, suitable supercapacitor electrode materials for graphene hydrogel (GH)/AC nanocomposites. GH/AC nanocomposites are synthesized via hydrothermal process at temperature of 180 degrees C. The low-temperature thermal exfoliation approach is convenient for mass production of graphene hydrogel (GH) at low cost and it can be used as electrode material for energy storage ap...
Initial crystallization in a nanostructured Al-Sm rare earth alloy Kalay, Yunus Eren; Chumbley, L. S.; Kramer, M. J.; Anderson, I. E. (Elsevier BV, 2010-06-15) The transformation kinetics and microstructural evolution during initial crystallization in highly driven Al(90)Sm(10) were investigated using transmission electron microscopy (TEM). conventional Cu K(alpha) and high-energy synchrotron X-ray diffraction (HEXRD) and differential scanning calorimetry (DSC). The highest cooling rate obtained in this study yielded a high number density of fcc-Al nanocrystals, with sizes on the order of 2-5 nm, embedded in a disordered matrix rich in an Al-Sm medium range order ...
Hierarchical nanowire and nanoplate-assembled NiCo2O4-NiO biphasic microspheres as effective electrocatalysts for oxygen evolution reaction Cetin, A.; Esenturk, E. N. (2019-12-01) In this study, NiCo2O4-NiO nanomaterials with two different morphologies were synthesized using urea and cetyltrimethylammonium chloride (CTAC) as structure directing agents. A combination of analytical techniques including XRD, XPS, SEM-EDX, TEM, and BET were utilized for the characterization of the materials. Microscopy images show that urea-stabilized NiCo2O4-NiO (UeNiCo) has urchin-like morphology assembled by nanowires, and CTAC stabilization (C-NiCo) led to the formation of microspheres with nanoplate...

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.