Chromium substituted iron oxide nanowires as affordable electrocatalysts for oxygen evolution reaction

Kocabas, Serra
Çetin, Asude
Önal, Ahmet Muhtar
Nalbant Esentürk, Emren
Earth-abundant metal oxides have become center of attention in the application of electrochemical energy conversion and storage. In this work, CrFeO3 was synthesized as a new catalyst for oxygen evolution reaction (OER). The structural and chemical properties of CrFeO3 were characterized by TEM, SEM, EDX, XRD, XPS, and BET analyses. The microscopy images reveal that CrFeO3 have wire-like morphology, which was formed by assembly of ca. 14nm nanocrystallites. Then, potential utility of the synthesized nanowires (NWs) as catalysts in OER has been investigated. The CrFeO3 NW-modified fluorinated tin oxide (FTO) electrodes exhibited promising OER performance with an onset potential of 1.63V vs RHE, overpotential of 737mV at 10mAcm(-2) current density, and Tafel slope of 57mVdec(-1). Additionally, CrFeO3 NWs are demonstrated to be very stable electrocatalyst during OER. The CrFeO3 NWs present an overall electrocatalytic performance that is comparable to the one of RuO2, and promise a great potential as an effective and affordable OER catalyst.


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Thermoelectric (TE) polymers have unique advantages in converting heat into electricity. But their Seebeck coefficient is lower than that of inorganic TE materials by about one order of magnitude. Here, surface energy filtering is proposed to significantly enhance the Seebeck coefficient of TE polymers. The as-prepared poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS, the most popular TE polymer) films from aqueous solution have a low Seebeck coefficient of 15-18 mu V K(-1)and a power fact...
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Magnetic ferrite nanopowders were coated with polydopamine which is inert against the hydrolysis of ammonia borane. Coating of ferrite powders was achieved by pH-induced self-polymerization of dopamine hydrochloride at room temperature. Palladium(0) nanoparticles supported on polydopamine coated ferrite (Pd-0/PDA-Fe3O4) were prepared by impregnation of palladium(II) ions on the surface of PDA-Fe3O4 followed by their reduction with sodium borohydride in aqueous solution at room temperature. Magnetically isol...
Citation Formats
S. Kocabas, A. Çetin, A. M. Önal, and E. Nalbant Esentürk, “Chromium substituted iron oxide nanowires as affordable electrocatalysts for oxygen evolution reaction,” JOURNAL OF NANOPARTICLE RESEARCH, pp. 0–0, 2019, Accessed: 00, 2020. [Online]. Available: