English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

Two chronopotentiometric waves were observed for the electrochemical reduction of molybdate in the presence of zinc chloride, with quar te r -wave potentials of --1.5V and --1.75V vs. the P t ( I I ) / P t reference electrode, respectively. It was observed that an increase in the molybdate concentrat ion causes a decrease of the first t ransi t ion time indicating a chemical reaction between ZnC12 (which is reduced at --1.5V) and LifMoO4 in the melt forming ZnMoO4 which is sparingly dissociated in LiC1-KC1 eutectic. The equi l ibr ium constant 'for the observed reaction was calculated. Xray powder diffraction pat terns of the reduction product of ZnMoO4 have been obtained. Lai t inen and Propp (1) have shown that the electrochemical reduction product of KfCrO4 in LiC1-KC1 eutectic containing dissolved MgC12 is a single compound of formula LixMgyCrO4, where x § 2y ---5. Lai t inen and Hanck (2) observed that the reduction of chromate in the presence of Zn( I I ) was shifted from --1.0V vs. Pt ( I I ) /P t reference to --0.5V. Analysis of the deposit indicated the composition to be LiZnfCrO4. Lai t inen and Popov (3) also observed that when chromate is reduced in the presence of NiC12 at 500~ the deposit approaches the composition LiNifCrO4. The purpose of the present research is to characterize the insoluble electrode deposit formed when Li~MoO4 is reduced in the presence of ZnC12 in LiC1KC1 eutectic. The knowledge gained through this study will contr ibute to the over-al l unders tanding of moIybdate electrochemistry (4, 5) and should aid the interpreta t ion of the mechanism of the electrochemical reduction of LifMoO4 in LiC1-KC1 eutectic. Experimental Solvent.--The eutectic mixture of potassium chloride [41 mole per cent (m/o) ] and l i th ium chloride (59 m/o) at 450~ was used as a solvent system. The LiC1-KC1 eutectic was obtained from Anderson Physics Laboratories, Incorporated, Champaign, Illinois. The method of purification has been described (1). Apparatus.--The ins t rumenta t ion and equipment used in this s tudy have been previously described (1-5). Electrolytic cel l --The cell used in this exper iment has been previously described (6). Within this cell and under an atmosphere of dry, oxygen-free argon, the solvent was allowed to collect into the fritted compar tments which were used as experimental cells. At the end of the exper iment the volume of each compartment was determined by t i t rat ing its chloride content, and making calculations from the known density of the melt at 450~ Electrodes.--The reference electrode was a p la t inum foil in contact with p l a t inum(I I ) solution. This reference electrode has been shown to be reproducible andnonpolarizable over a long period of time (7). The Pt indicator electrode used in this study has been pre* E l e c t r o c h e m i c a l Soc ie ty A c t i v e Member ,

Electrochemical Reduction of Molybdate in the Presence of Zinc Chloride in Molten Lithium Chloride‐Potassium Chloride Eutectic