Cooperative Effects Associated with High Electrolyte Concentrations in Driving the Conversion of CO2 to C2H4 on Copper DOI Creative Commons

Shaoyang Lin,

Yuval Fishler, Soonho Kwon

и другие.

Опубликована: Июнь 14, 2024

Increasing the product selectivity and decreasing cost of separation is critical for large scale application electrochemical CO2 reduction (ECO2R). We hypothesize that highly concentrated aqueous electrolytes can tune microenvironment catalyst/electrolyte interface improve selectivity. Compared to a conventional electrolyte concentration 1 M HCOOK, use 7.1 HCOOK increases FE ratio C2H4/CO from 2.2 ± 0.3 18.3 4.8 at -1.08 V vs RHE on Cu gas diffusion electrode. Based analysis AIMD simulation, identity cation anion play more important roles in controlling CO2R reaction pathway than bulk solubility pH electrolytes. In-situ ATR-SEIRAS suggests that, unlike *CO-bridge binding mode dominant electrolyte, which potentially results less CO release higher yield C2H4. This study demonstrates while we tailor composition shift selectivity, factors control are numerous cannot be distilled down into one correlated property-reactivity relationship. Thus, when conditions changed, care must taken understand their effects properties electrode-electrolyte interface.

Язык: Английский

Cooperative Effects Associated with High Electrolyte Concentrations in Driving the Conversion of CO2 to C2H4 on Copper DOI Creative Commons

Shaoyang Lin,

Yuval Fishler, Soonho Kwon

и другие.

Опубликована: Июнь 14, 2024

Increasing the product selectivity and decreasing cost of separation is critical for large scale application electrochemical CO2 reduction (ECO2R). We hypothesize that highly concentrated aqueous electrolytes can tune microenvironment catalyst/electrolyte interface improve selectivity. Compared to a conventional electrolyte concentration 1 M HCOOK, use 7.1 HCOOK increases FE ratio C2H4/CO from 2.2 ± 0.3 18.3 4.8 at -1.08 V vs RHE on Cu gas diffusion electrode. Based analysis AIMD simulation, identity cation anion play more important roles in controlling CO2R reaction pathway than bulk solubility pH electrolytes. In-situ ATR-SEIRAS suggests that, unlike *CO-bridge binding mode dominant electrolyte, which potentially results less CO release higher yield C2H4. This study demonstrates while we tailor composition shift selectivity, factors control are numerous cannot be distilled down into one correlated property-reactivity relationship. Thus, when conditions changed, care must taken understand their effects properties electrode-electrolyte interface.

Язык: Английский

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