Synthesis of Ce−Fe Intermetallic Compounds with Foam Structures via Electrochemical Deposition

Abstract

Cyclic voltammetry was used to investigate the electrochemical behaviors of Fe(II) and Ce(III) in 3.00 mol/L urea−dimethylsulfoxide (DMSO). The electrode processes of Fe(II) and Ce(III) reducing on Pt electrodes were irreversible steps. Experimental results showed that Fe(II) in 3.00 mol/L urea−DMSO could induce the electrodeposition of Ce(III). The Ce−Fe intermetallic compounds with foam structures were successfully obtained by potentiostatic electrodeposition in the 0.01 mol/L Ce(CH3SO3)3−0.01 mol/L FeCl2−3.00 mol/L urea−DMSO system. The concentrations of the salts and hydrogen ions have much effect on the pore number and wall structure of the foam. The effect of the potential of electrodeposition, Fe2+ concentration, and the ratio of the concentrations of Ce3+ to Fe2+ in the deposition solution on the contents of Ce in Ce−Fe intermetallic compounds were investigated in our paper. The electrodeposited Ce−Fe intermetallic compounds were amorphous as proved by X-ray diffraction analysis (XRD).

Microstructural Evolution of CeO2 from Porous Structures to Clusters of Nanosheet Arrays Assisted by Gas Bubbles via Electrodeposition

“…These produced gas bubbles will move toward the electrolyte/air interface during the electrodeposition process. Thus, metal growth toward the gas bubble will be prohibited simply because there are no metal ions available there, which will lead to the electrodeposition happening only between gas bubbles and, accordingly, the formation of CeO 2 porous structures as illustrated in Figure a. When the concentration of Ce(NO 3 ) 3 was increased to 0.02 M, the deposition rate of CeO 2 was also increased, which will lead to the formation of smaller gas bubbles.…”

Fern-shaped bismuth dendrites electrodeposited at hydrogen evolution potentials

“…In recent years, hydrogen bubble assisted electrodeposition has been applied to porous nanostructures of many materials. [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48] Until now, however, little work has been done on the direct electrodeposition of bismuth from aqueous electrolyte at hydrogen evolution potentials. Meanwhile, two questions involving hydrogen bubbles need to be addressed further.…”