A novel CF/Ti/β-PbO₂ composite anode for zinc electrowinning: preparation, electrochemical properties and application

Abstract

The CF/Ti/β-PbO2 composite was prepared for the first time by thermal decomposition and electrodeposition. Compared with the Pb–Ag anode, the current efficiency and service life of the CF/Ti/β-PbO2 anode increased by 14.92% and 232%, respectively.

Preparation and Electrochemical Properties of the CF-Ti/β-PbO2 Composite Anode for Zinc Electrowinning

“…During the electrodeposition process, the battery voltage and corrosion resistance of the composite anode were measured as part of the testing phase. 24,33,34 LSV, Tafel and EIS are the techniques used for electrochemical measurements. The study focused on the electrocatalytic performance of the composite anode in the process of zinc electrodeposition.…”

“…The Ti/Sb-SnO 2 /β-PbO 2 composite anode showed a prolonged electrolysis duration of 23 h at a steady current density of 1.0 A•cm −2 in a solution containing 1.0 mol•l −1 of H 2 SO 4 . Research on the benefits of carbon fiber-based anodes, including their lightweight nature, excellent electrical conductivity, and robust resistance to corrosion, [24][25][26][27] has gained significant attention. The corrosion rates of CF/β-PbO 2 anodes and traditional lead-silver anodes are 1.53 × 10 −3 g•cm −2 •h −1 and 8.64 × 10 −3 g•cm −2 •h −1 , respectively.…”

Ce-doped three-dimensional graphite felt/PbO2 anode: single-step room-temperature electrodeposition and efficient electrocatalytic degradation of tetracycline

“…The traditional flat titanium (Ti)-based PbO 2 electrodes have been extensively used within the realm of electrochemical catalytic breakdown of contaminants. [31][32][33] The planar configuration of Ti substrates imposes limitations on their surface area to volume ratio, which adversely affects the efficiency of mass transfer and the electrocatalytic activity. 34 Furthermore, the issues of lead leaching and a shortened lifespan continue to beset conventional flat Ti/PbO 2 anodes.…”

Contradictory role of reactive oxygen species in dissolution-dependent activity of Pb-based anodes in acidic electrooxidation

“…12 Considering the high toxicity of Pb, various metal elements and metal compounds as alternatives have been explored to reduce the Pb proportion. 16,17 Despite the above signicant progress, Pb-based anodes (Pb-Ag, Pb >99 wt%) remained the mostly widely used anodes in industrial hydrometallurgy. 15 The risks of potential environmental Pb exposure would endanger the health of surrounding residents.…”