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The site pair matching of a tandem Au/CuO-CuO nanocatalyst for promoting the selective electrolysis of CO₂ to C₂ products.

ABSTRACT: Tandem catalysis, in which a CO₂-to-C₂ process is divided into a CO₂-to-CO/*CO step and a CO/*CO-to-C₂ step, is promising for enhancing the C₂ product selectivity when using Cu-based electrochemical CO₂ reduction catalysts. In this work, a nanoporous hollow Au/CuO-CuO tandem catalyst was used for catalyzing the eCO₂RR, which exhibited a C₂ product FE of 52.8% at -1.0 V vs. RHE and a C₂ product partial current density of 78.77 mA cm^-2 at -1.5 V vs. RHE. In addition, the C₂ product FE stably remained at over 40% over a wide potential range, from -1.0 V to -1.5 V. This superior performance was attributed to good matching in terms of the optimal working potential and charge-transfer resistance between CO/*CO-production sites (Au/CuO) and CO/*CO-reduction sites (CuO). This site pair matching effect ensured sufficient supplies of CO/*CO and electrons at CuO sites at the working potentials, thus dramatically enhancing the formation rate of C₂ products.

SUBMITTER: Zhou JH

PROVIDER: S-EPMC9044023 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature

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The site pair matching of a tandem Au/CuO-CuO nanocatalyst for promoting the selective electrolysis of CO2 to C2 products.

Zhou Jun-Hao JH Yuan Chen-Yue CY Zheng Ya-Li YL Yin Hai-Jing HJ Yuan Kun K Sun Xiao-Chen XC Zhang Ya-Wen YW

RSC advances 20211129 61

Tandem catalysis, in which a CO2-to-C2 process is divided into a CO2-to-CO/*CO step and a CO/*CO-to-C2 step, is promising for enhancing the C2 product selectivity when using Cu-based electrochemical CO2 reduction catalysts. In this work, a nanoporous hollow Au/CuO-CuO tandem catalyst was used for catalyzing the eCO2RR, which exhibited a C2 product FE of 52.8% at -1.0 V vs. RHE and a C2 produ ...[more]

PMID: 35493218

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Project description:In this study, we developed a novel pyrazolo[3,4-c]pyrazole derivative with antibacterial and antifungal activities that shows great potential for treating infectious diseases. To evaluate the binding affinity of 1AJ0 and 1AI9 proteins for developing potent antibacterial and antifungal compounds, we used the Vitex negundo (VN) leaf extract as the capping and reducing agent and reacted it with Fe2O3 and Cu(OAc)2 solutions to synthesize the VN-Fe3O4-CuO nanocatalyst. The newly synthesized compounds were confirmed using Fourier transform infrared spectroscopy, transmission electron microscopy, UV-visible spectroscopy, and X-ray diffraction analyses. Antibacterial screening revealed that compound 1g was highly active against Escherichia coli (MIC: 1 μg mL-1) and was much more effective than the standard ciprofloxacin. Compound 1b showed a higher antifungal activity than clotrimazole against Candida albicans (MIC: 0.25 μg mL-1) and cytotoxic activity against MCF-7 cancer cell lines. Compounds 1a-1l were exhibited low cytotoxicity activity compared to the standard doxorubicin (LC50: 21.05 ± 0.82 μg mL-1). To further support the discovery of new active antibacterial agents, compounds 1g and 1b and proteins 1AJ0 and 1AI9 were examined using the AutoDock Vina program and were compared with the standards ciprofloxacin and clotrimazole. With the 1AJ0 protein, compound 1g had a higher docking score (-3.7 kcal mol-1) than ciprofloxacin (-5.6 kcal mol-1), and with the 1AI9 protein, compound 1b had a higher docking score (-4.8 kcal mol-1) than clotrimazole (-4.4 kcal mol-1). Additionally, molecular dynamics simulation was used to investigate the most probable binding mode of compounds 1b and 1g with 1AI9 and 1AJ0, respectively. The VN-Fe3O4-CuO catalyst was used to prepare pyrazolo[3,4-c]pyrazole derivatives, which were successfully characterized and screened for antimicrobial and cytotoxic activities, molecular docking, and molecular dynamics simulation studies.

Dataset Information

The site pair matching of a tandem Au/CuO-CuO nanocatalyst for promoting the selective electrolysis of CO₂ to C₂ products.

Publications

The site pair matching of a tandem Au/CuO-CuO nanocatalyst for promoting the selective electrolysis of CO<sub>2</sub> to C<sub>2</sub> products.

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