Probing Electrolyte Influence on CO<sub>2</sub> Reduction in Aprotic Solvents
نویسندگان
چکیده
Selective CO2 capture and electrochemical conversion are important tools in the fight against climate change. Industrially, is captured using a variety of aprotic solvents due to their high solubility. However, most research efforts on use aqueous media plagued by competing hydrogen evolution reaction (HER) from water breakdown. Fortunately, can circumvent HER, making it develop strategies that enable integrated conversion. influence ion solvation solvent selection within nonaqueous electrolytes for efficient selective reduction unclear. In this work, we show bulk behavior electrolyte control product distribution occurring at catalyst–electrolyte interface. We study different tetrabutylammonium (TBA) salts two systems with glyme ethers (e.g., 1,2 dimethoxyethane or DME) dimethyl sulfoxide (DMSO) as low dielectric constant medium, respectively. Using spectroscopic tools, quantify fraction pairs forms electrolyte. Also, how pair formation prevalent DME dependent anion type. More importantly, decreases electrolyte, current densities increase, higher CO Faradaic efficiency observed overpotentials. Meanwhile, an medium where does not change type (such DMSO), smaller distribution. By directly coupling interfacial reactions distribution, showcase importance utility controlling microenvironment tuning electrocatalytic pathways. Insights gained work will novel designs desired fuels chemicals.
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ژورنال
عنوان ژورنال: Journal of Physical Chemistry C
سال: 2022
ISSN: ['1932-7455', '1932-7447']
DOI: https://doi.org/10.1021/acs.jpcc.2c03321