Electrochemical Study of the Hydrogen Evolution Reaction using Coppe r(II) Thiacalix[4]arene-based Catalyst

Despite the interesting structure of the generic thiacalix[4]arene containing four coordinating sulfur atoms bridging four phenolic units, there are only a few reported examples of thiacalixarene-based coordination complexes that are used as electrocatalysts. Herein, we report electrocatalytic hydro...

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Published in:Journal of the Chemical Society of Pakistan 2023-04, Vol.45 (2), p.113-113
Main Authors: Hani El Moll, Hani El Moll, Khalaf M Alenezi, Khalaf M Alenezi, Abdallah O Alshammari, Abdallah O Alshammari, Ashanul Haque, Ashanul Haque, Jamal Humaidi Raoudha Soury, Jamal Humaidi Raoudha Soury, Eid M S Azzam, Eid M S Azzam, Fahad Abdulaziz, Fahad Abdulaziz, Salman Latif, Salman Latif, Milan Vrane, Milan Vrane
Format: Article
Language:English
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Summary:Despite the interesting structure of the generic thiacalix[4]arene containing four coordinating sulfur atoms bridging four phenolic units, there are only a few reported examples of thiacalixarene-based coordination complexes that are used as electrocatalysts. Herein, we report electrocatalytic hydrogen evolution reaction (HER) by a thiacalix[4]arene-based copper(II) complex (1). As expected, two reduction waves were appeared (-0.48 V and -1.30 V vs Ag/AgCl) for Cu2+/Cu+ and Cu+/Cu reduction couples. The HER by proton reduction occurs at -1.03 V with a shift of 0.27 V compared to the second peak potential at -1.30 V. The increase in the number of acetic acid equivalents, from 0 to 17.5 with a frequency of 2.5 eq, was accompanied by an increase in the peak current that reached a maximum value of 183 and#181;A for 15 equivalents of acetic acid.
ISSN:0253-5106
DOI:10.52568/001216/JCSP/45.02.2023