Detection of Hydrogen Gas Generated upon Magnesium Dissolution Using a Gas Chromatograph–Channel Flow Electrode System

Hoshi, Yoshinao; Hirayama, Yusuke; Watanabe, Hikari; Shitanda, Isao; Itagaki, Masayuki

doi:10.1149/1945-7111/acba4a

Cited by 2 publications

(1 citation statement)

References 13 publications

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“…The gravimetric method was combined with an electrochemical flow cell and the AESEC technique which permits a time resolved masscharge balance of dissolution. 24,25 Hoshi et al 10,26,27 developed a gas chromatography method to detect H 2 evolution rates. Lebouil et al 28 presented a time resolved volumetric method based on visual imaging of the gas bubbles released from an electrochemical flow cell to a microfluidic flow system.…”

Section: Respirometric Approachmentioning

confidence: 99%

Respirometric in Situ Methods for Real-Time Monitoring of Corrosion Rates: Part III. Deconvolution of Electrochemical Polarization Curves

Strebl

Bruns

Virtanen

2023

J. Electrochem. Soc.

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A highly sensitive respirometric method is presented that allows real-time monitoring of reaction rates involving H2 and O2 during electrochemical polarization. The measurement approach is based on simultaneous monitoring of the changes in the total pressure and the O2 partial pressure inside a closed chamber. Hence, it is possible to quantify the rates resulting from reactions such as H2 evolution reaction (HER), O2 reduction reaction, and O2 evolution reaction as a function of the applied potential. As a result, deconvolution of the net electric current into cathodic and anodic partial reaction rates during electrochemical polarization can be obtained. It was demonstrated that the respirometric monitoring approach can reveal superfluous cathodic reactions from Al during cathodic polarization as well as during anodic polarization of Al and Mg AZ31. Thus, the true metal oxidation rate could be determined from the electric current and the cathodic reaction rates. Furthermore, the rate of the HER during cathodic electrodeposition of Zn was measured. Through respirometric monitoring of Ni and stainless steel at high anodic potentials, the rate of O2 evolution could be distinguished from electrode oxidation processes.

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