Copper-Copper Sulfate Reference Electrode for Operating in High Temperature and High Pressure Aqueous Environments

Derek M. Hall; Justin R. Beck; Edward Brand; Margaret Ziomek-Moroz; Serguei N. Lvov

doi:10.1016/j.electacta.2016.10.143

Copper-Copper Sulfate Reference Electrode for Operating in High Temperature and High Pressure Aqueous Environments

Derek M. Hall, Justin R. Beck, Edward Brand, Margaret Ziomek-Moroz, Serguei N. Lvov

Research output: Contribution to journal › Article

5 Scopus citations

Abstract

A copper-copper sulfate electrode (CSE) was constructed and tested at elevated temperatures. Experimental cell potentials versus a silver-silver chloride electrode were compared against results from Gibbs energy minimization (GEM) calculations. After accounting for irreversible thermodynamic processes, experimental and calculated CSE potentials_, were generally within 3% of the observed potential from 25 to 150 °C at 3 MPa. The CSE potentials changed by less than 20 mV with increasing temperature, compared to 120 mV for the silver-silver chloride electrode. With its repeatability and small temperature dependence, the CSE electrode appears to be a viable reference electrode for measuring in-situ real time cell potentials in aqueous phase-containing media at elevated temperature and pressure.

Original language	English (US)
Pages (from-to)	96-106
Number of pages	11
Journal	Electrochimica Acta
Volume	221
DOIs	https://doi.org/10.1016/j.electacta.2016.10.143
State	Published - Dec 10 2016

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All Science Journal Classification (ASJC) codes

Chemical Engineering(all)
Electrochemistry

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Hall, D. M., Beck, J. R., Brand, E., Ziomek-Moroz, M., & Lvov, S. N. (2016). Copper-Copper Sulfate Reference Electrode for Operating in High Temperature and High Pressure Aqueous Environments. Electrochimica Acta, 221, 96-106. https://doi.org/10.1016/j.electacta.2016.10.143

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abstract = "A copper-copper sulfate electrode (CSE) was constructed and tested at elevated temperatures. Experimental cell potentials versus a silver-silver chloride electrode were compared against results from Gibbs energy minimization (GEM) calculations. After accounting for irreversible thermodynamic processes, experimental and calculated CSE potentials, were generally within 3% of the observed potential from 25 to 150 °C at 3 MPa. The CSE potentials changed by less than 20 mV with increasing temperature, compared to 120 mV for the silver-silver chloride electrode. With its repeatability and small temperature dependence, the CSE electrode appears to be a viable reference electrode for measuring in-situ real time cell potentials in aqueous phase-containing media at elevated temperature and pressure.",

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AU - Ziomek-Moroz, Margaret

AU - Lvov, Serguei N.

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AB - A copper-copper sulfate electrode (CSE) was constructed and tested at elevated temperatures. Experimental cell potentials versus a silver-silver chloride electrode were compared against results from Gibbs energy minimization (GEM) calculations. After accounting for irreversible thermodynamic processes, experimental and calculated CSE potentials, were generally within 3% of the observed potential from 25 to 150 °C at 3 MPa. The CSE potentials changed by less than 20 mV with increasing temperature, compared to 120 mV for the silver-silver chloride electrode. With its repeatability and small temperature dependence, the CSE electrode appears to be a viable reference electrode for measuring in-situ real time cell potentials in aqueous phase-containing media at elevated temperature and pressure.

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10.1016/j.electacta.2016.10.143