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Can I read Aprotic Solvent Exposes an Altered Mechanism for Copper-Catalyzed Ethylene Electrosynthesis on EtoBox?
Aprotic Solvent Exposes an Altered Mechanism for Copper-Catalyzed Ethylene Electrosynthesis by An T. Chu; Yogesh Surendranath is a Chemistry article available to read on EtoBox.
What is Aprotic Solvent Exposes an Altered Mechanism for Copper-Catalyzed Ethylene Electrosynthesis about?
The selectivity and efficiency of Cu-catalyzed CO or CO electroreduction are known to be sensitive to the electrolyte composition. However, in aqueous media, changes to pH and ionic composition do not alter the electrokinetic profile of C product formation, commonly invoked to proceed via a rate-limiting pH-independent C-C coupling step to form an oxyanionic \*CO dimer. We hypothesize that new mechanistic pathways can be exposed in an aprotic solvent-based electrolyte, where inhibited interfacial charge stabilization can favor pathways with electroneutral intermediates resulting from proton-coupled electron-transfer (PCET) steps from an exogenous donor. We herein report CO electroreduction to higher-order products on a polycrystalline Cu catalyst with dimethyl sulfoxide as the solvent and phenol as the proton donor. CO is reduced principally to C products including ethylene, acetate, ethylene glycol, and ethane with negligible methane production. In stark contrast to aqueous electrolytes, we observe a low Tafel slope (27 ± 1 mV dec) and Nernstian dependence on proton activity for ethylene formation, suggesting a dramatically different mechanism involving quasi-equilibrated PCET ste
Who reads Aprotic Solvent Exposes an Altered Mechanism for Copper-Catalyzed Ethylene Electrosynthesis?
It is typically read by researchers, students, and practitioners in Chemistry.
- Author
- An T. Chu; Yogesh Surendranath
- Publisher
- American Chemical Society (ACS)
- Published
- 2022
- Language
- EN
- Field
- Chemistry (Physical Sciences)