Cubic CuFe₂O₄ Spinel with Octahedral Fe Active Sites for Electrochemical Dechlorination of 1,2-Dichloroethane

Abstract

CuFe 2 O 4 spinel has been considered as a promising catalyst for the electrochemical reaction, while the nature of the crystal phase on its intrinsic activity and the kind of active site need to be further explored. Herein, the crystal phase-dependent catalytic behavior and the main active sites of CuFe 2 O 4 spinel for electrochemical dechlorination of 1,2-dichloroethane are carefully studied based on the combination of experiments and theoretical calculations. Cubic and tetragonal CuFe 2 O 4 are successfully prepared by a facile sol−gel method combined with high temperature calcination. Impressively, CuFe 2 O 4 with the cubic phase shows a higher activity and ethylene selectivity compared to CuFe 2 O 4 with the tetragonal phase, suggesting a significant facilitation of electrocatalytic performance by the cubic crystal structure. Moreover, the octahedral Fe atom on the surface of cubic CuFe 2 O 4 (311) is the active site responsible to produce ethylene with the energy barrier of 0.40 eV. This work demonstrates the significance of crystal phase engineering for the optimization of electrocatalytic performance and offers an efficient strategy for the development of advanced electrocatalysts.

Low-Temperature Total Oxidation of Propane Using Silver-Decorated MnO2 Nanorods

“…These short chain alkanes make up the major portion of hydrocarbons in vehicle exhausts and has led to a significant impact on the environment . Notably, propane possesses high chemical and thermal stability and thus requires elevated temperatures to activate, thus making its oxidation a tedious process . Due to the less energy cost, low ignition temperature, environment-friendly end products, and high efficiency, catalytic oxidation is regarded as a facile strategy to control the propane emission. − Since usage of propane as fuel in transportation vehicles is emerging tremendously, a catalyst that can effectively control this VOC through total oxidation of propane becomes highly crucial.…”

Electrospun CuMn2O4 Spinel Nanofibers as Electrocatalysts for the Production of Chloromethane and Aromatic Chlorides

“…In addition, Alam et al synthesized the CuMn 2 O 4 spinel with an urchin-like nanostructure by a hydrothermal method and the spinel can be an efficient electrocatalyst to oxidize HMF to FDCA. Gan et al prepared the cubic and tetragonal crystal-phase CuFe 2 O 4 spinel for electrochemical dechlorination of 1,2-dichloroethane. Xu et al developed NiMn 2 O 4 –CS as the catalyst for selective dechlorination of 1,2-dichloroethane.…”

“…In addition, Alam et al 20 synthesized the CuMn 2 O 4 spinel with an urchin-like nanostructure by a hydrothermal method and the spinel can be an efficient electrocatalyst to oxidize HMF to FDCA. Gan et al 21 It is well known that the morphology and structure, especially one-dimensional nanofibers, are crucial for improving the performance of electrocatalysts and exposing more active sites. 24−26 Electrospinning is a simple operation and controllable morphology technology that can be used to manufacture one-dimensional nanofibers on a large scale.…”

A Lower Working Potential and Real-Time H2S Sensor Based on Nano-CuFe2O4 and Lotus Leaf Derived Carbon Material Composite

“…It has a similar structure to spinel, and has good magnetic properties, high catalytic performance in oxidation, reduction and cracking reactions. 25 It can be used for adsorption materials, gas sensitive materials, catalytic materials, magnetic materials and plays an important role in the preparation of electrode materials. The preparation methods of nano-CuFe 2 O 4 include sol-gel method, solid phase reaction method, co-precipitation method, microwave method, mechanized method, etc.…”

“…The preparation methods of nano-CuFe 2 O 4 include sol-gel method, solid phase reaction method, co-precipitation method, microwave method, mechanized method, etc. [25][26][27][28][29][30][31][32][33] Only the products obtained by hightemperature solid phase reaction method have small particle size and good morphology. 26 In present work, we propose a stable and dispersed composite material for sensing of H 2 S in biological liquid with high sensitivity.…”