Electrochemical kinetics of the hydrogen reaction on platinum in concentrated HCl(aq)

Derek M. Hall; Justin R. Beck; Serguei N. Lvov

doi:10.1016/j.elecom.2015.05.012

Electrochemical kinetics of the hydrogen reaction on platinum in concentrated HCl(aq)

Derek M. Hall, Justin R. Beck, Serguei N. Lvov

Research output: Contribution to journal › Article

6 Scopus citations

Abstract

The hydrogen reaction in concentrated HCl(aq) solutions is a key reaction for the CuCl(aq)/HCl(aq) electrolytic cell. Here, electrochemical impedance spectroscopy (EIS) and linear sweep voltammetry (LSV) were used to obtain new data for the hydrogen reaction on platinum submerged in highly concentrated acidic solutions at 25 °C and 0.1 MPa. LSV and EIS data were collected for Pt in 0.5 mol/L H₂SO₄(aq), 1 mol/L HCl(aq) and 7.71 mol/L HCl(aq) solutions. It was found that exchange current density (j₀) values varied between 1 and 2 mA/cm². An equivalent circuit model was used to obtain comparable j₀ and limiting current density values from EIS data relative to values obtained with LSV data. It was found that as the concentration of acid increased, a noticeable decrease in the performance was observed.

Original language	English (US)
Pages (from-to)	74-77
Number of pages	4
Journal	Electrochemistry Communications
Volume	57
Issue number	1
DOIs	https://doi.org/10.1016/j.elecom.2015.05.012
Publication status	Published - Jan 1 2015

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All Science Journal Classification (ASJC) codes

Electrochemistry

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Hall, D. M., Beck, J. R., & Lvov, S. N. (2015). Electrochemical kinetics of the hydrogen reaction on platinum in concentrated HCl(aq). Electrochemistry Communications, 57(1), 74-77. https://doi.org/10.1016/j.elecom.2015.05.012

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10.1016/j.elecom.2015.05.012