Mechanochemical Synthesis and Electrochemical Characterization of Nano Crystalline Calcium Ferrite

被引：12

作者：

Berchmans, L. John ^{[1
]}

Karthikeyan, R. ^{[1
]}

Helan, M. ^{[1
]}

Berchmans, Sheela ^{[1
]}

Sepelak, V. ^{[3
]}

Becker, K. D. ^{[2
]}

机构：

[1] Cent Electrochem Res Inst, Div Electropyromet, Karaikkudi 630006, Tamil Nadu, India

[2] Braunschweig Univ Technol, Inst Phys & Theoret Chem, D-38106 Braunschweig, Germany

[3] Karlshrue Inst Technol, Inst NanoTechnol, Karlshrue, Germany

来源：

CATALYSIS LETTERS | 2011年 / 141卷 / 10期

关键词：

Nanostructures; Electron microscopy; X-ray diffraction; Electrochemical properties; OXYGEN EVOLUTION REACTION; NONEQUILIBRIUM CATION DISTRIBUTION; CANTED SPIN ARRANGEMENT; ELECTROCATALYTIC PROPERTIES; THERMAL-DECOMPOSITION; ALKALINE-MEDIUM; O-2; EVOLUTION; CATALYTIC-PROPERTIES; PARTIAL SUBSTITUTION; ANODIC EVOLUTION;

D O I：

10.1007/s10562-011-0636-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The studies on the mechanochemical synthesis and electrochemical characterization of orthorhombic calcium ferrite (CaFe(2)O(4)) are reported in this paper. Stoichiometric mixtures of alpha-Fe(2)O(3) and granulated Ca metal were used as the starting materials for the synthesis process. The synthesized calcium ferrite was characterized by room-temperature Mossbauer spectra, XRD and TEM. The electrochemical characterisation was carried out using cyclic voltammetry studies. Mossbauer spectra provide the yield of the reaction, information on the charge status, the local symmetry and the magnetic state of the iron ions in the mechanosynthesized ferrite material. XRD analysis of the CaFe(2)O(4) compound reveals the orthorhombic crystal structure with an average crystalline size of about 28 nm. TEM micrographs reveal the nanoparticles with irregular crystal morphology ranging from 8 to 30 nm. The electrochemical studies clearly show that the calcium ferrite compound can act as an electrocatalyst for Oxygen Evolution Reaction (OER).

引用

页码：1451 / 1457

页数：7

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