A Water-Soluble Sodium Pectate Complex with Copper as an Electrochemical Catalyst for Carbon Dioxide Reduction

Molecules

Kirill V. Kholin¹  Marsil K. Kadirov¹  Vasily M. Babaev¹  Mikhail N. Khrizanforov¹  Yulia H. Budnikova¹  Salima T. Minzanova¹  Guliya R. Nizameeva² 

[1] Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, 420088 Kazan, Russia;Department of Physics, Kazan National Research Technological University, 420015 Kazan, Russia;

关键词: pectate complex;    copper;    carbon dioxide reduction;    electrocatalysis;    methane;   

DOI  :  10.3390/molecules26185524

来源: DOAJ

【 摘 要 】

A selective noble-metal-free molecular catalyst has emerged as a fruitful approach in the quest for designing efficient and stable catalytic materials for CO₂ reduction. In this work, we report that a sodium pectate complex of copper (PG-NaCu) proved to be highly active in the electrocatalytic conversion of CO₂ to CH₄ in water. Stability and selectivity of conversion of CO₂ to CH₄ as a product at a glassy carbon electrode were discovered. The copper complex PG-NaCu was synthesized and characterized by physicochemical methods. The electrochemical CO₂ reduction reaction (CO₂RR) proceeds at −1.5 V vs. Ag/AgCl at ~10 mA/cm² current densities in the presence of the catalyst. The current density decreases by less than 20% within 12 h of electrolysis (the main decrease occurs in the first 3 h of electrolysis in the presence of CO₂). This copper pectate complex (PG-NaCu) combines the advantages of heterogeneous and homogeneous catalysts, the stability of heterogeneous solid materials and the performance (high activity and selectivity) of molecular catalysts.

【 授权许可】

Unknown