Electrochemical decomposition of SiO2 pellets to form silicon in molten salts

Kinetic Characteristics of Electrochemical Reduction of SiO2Granules in Molten CaCl2

“…[6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] Meanwhile, the authors [26][27][28][29][30][31][32][33] and other researchers [34][35][36][37][38][39][40][41][42][43] have demonstrated that solid silica (SiO 2 ) can be directly reduced to solid Si via electrolysis in molten salts. [6][7][8][9][10][11][12][13][14][15][16][17][18][19]…”

Difference in the Mechanism of Electrochemical Deoxidation of Conducting and Non-conducting Solid Oxide Preforms: An Experimental Demonstration with TiO2 and SiO2 Pellet Electrodes in CaCl2 Melt

“…Therefore the released oxide ions are available in the vicinity of the reduction zone and react chemically with the adjacent unreduced SiO 2 particles in the presence of Ca 2+ ions to form CaSiO 3 (Ca 2+ + SiO 2 + O 2-→ CaSiO 3 ). Since Si is highly porous and would aid easy removal of the generated oxide ions away from the reaction site in the fully dipped condition, CaSiO 3 was not observed as an intermediate product during the electrochemical reduction of SiO 2 pellets [17,[19][20][21][23][24][25]27] .…”

“…[3,7,8] . Several studies have been reported on the electrochemical reduction of oxides such as TiO 2 [1,3,5,[8][9][10][11] , Nb 2 O 5 [7,12,13] , UO 2 [14][15][16] , SiO 2 [17][18][19][20][21][22][23][24][25][26] etc. The process is being pursued in view of production of solar grade silicon as well [27] .…”

Preparation of porous lead from shape-controlled PbO bulk by in situ electrochemical reduction in ChCl–EG deep eutectic solvent

“…On one hand, the intimately contact and large contacting area between PbO and current collector can obviously reduce the junction resistance, and facilitate the electronic transport simultaneously [46]. On the other hand, the deep eutectic solvent electrolyte needs penetrate completely into the PbO bulk to form an integrated conductive network.…”