Jinxing Ji
Nickel electrowinning from chloride electrolytes is an innovative and efficient process developed and commercialized mainly by Falconbridge Ltd. Several fundamental aspects related to this process have been addressed in this thesis, including the thermodynamic study of nickel electrolytes, the measurement and modelling of the cathode surface pH during nickel electrowinning, and the kinetic study of nickel reduction and hydrogen evolution. The major apparatus and equipment used include a surface pH measuring device, an EG&G rotating disc electrode, a SOLARTRON 1286 Electrochemical Interface, and a RADIOMETER titrator system. All of the experiments were carried out via computer control. The thermodynamic study includes the activity coefficient of the hydrogen ion and the speciation of nickel electrolytes to obtain a better understanding of the properties of nickel electrolytes. The activity coefficient of the hydrogen ion (y11+) was measured using a combination glass pH electrode. It was found that y11+ was greater than 1 in concentrated NiCl2 solutions and increased significantly with increasing NiCl2 concentration. The addition of NaCl increases y11+, whereas the addition of Na2SO4 decreases it.
@article{b983936f-6a77-4e41-9933-ffe8bb2bc46f,
title={Fundamental aspects of nickel electrowin},
author={Jinxing Ji},
year={2026},
language={en}
}TY - JOUR TI - Fundamental aspects of nickel electrowin AU - Jinxing Ji PY - 2026 LA - en ER -
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