Abstract
MEASUREMENTS of the differential capacitance of the electrical double-layer at an LiCl–KCl eutectic melt/platinum interface at 450° C have been made by Laitinen and Roe1 over a range of potentials from −0.34 V to −2.11 V versus a Pt/Pt2+ (1 M) reference electrode. Their curve of capacitance versus potential can be roughly divided into two regions: an anodic region of comparatively high specific capacitance (∼100 µF cm−2) and a cathodic region of low specific capacitance (∼50 µF cm−2), the transition between them occurring at approximately −0.8 V to −1.0 V. The high values of capacitance were attributed1,2 to the specific adsorption of chloride ions at potentials which are presumably anodic to the point of zero charge of this interface.
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References
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GRAVES, A., INMAN, D. Adsorption and the Differential Capacitance of the Electrical Double-layer at Platinum/Halide Metal Interfaces. Nature 208, 481–482 (1965). https://doi.org/10.1038/208481b0
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DOI: https://doi.org/10.1038/208481b0
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