Selective electrocatalytic CO2 to methane and acetate on Cu3N-NaN3-EDA nanoparticles
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Jan 27, 2025 version files 872.43 KB
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README.md
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Abstract
Development of efficient catalysts made of earth abundant elements gains great attention of the scientific community. Herein, we report on the preparation, the surface functionalization of Cu3N nanoparticles and their use as catalyst for CO2 reduction reactions. Cu3N cubic nanoparticles, sized of 14.4 ± 2 nm, were synthesized using octadecyl-amine (ODA) as the capping ligand. A novel post-functionalization process was developed using a mixture of ethylenediamine (EDA) and sodium-azide (NaN3) to completely remove ODA ligand. The resultant Cu3N-NaN3-EDA nanoparticles showed an attractive catalytic CO2 reduction activity, e.g. favor the production of CH4 and acetate products in comparison to CO and formate products, when being assayed in a 0.1 M NaHCO3 solution saturated with CO2. HRTEM, Raman, and FTIR analyses were used to evidence the success of ligand exchange as well as the potential role of EDA ligand in favor CO2 reduction products.
README: Selective electrocatalytic CO2 to methane and acetate on Cu3N-NaN3-EDA nanoparticles
https://doi.org/10.5061/dryad.k98sf7mhp
Description of the data and file structure
Supporting information shows synthesis procedure, ligand exchange, material characterization, electrochemical measurements, product quantification and supporting figures and tables.
Figure S1. Average length and width of Cu3N, Cu3N-NaN3, and Cu3N-NaN3-EDA nanoparticles
Figure S2. Digital photo taken on suspension of Cu3N-NaN3-EDA NPs after conducting the ligand exchange in air (left vial) and in N2 atmosphere (right vial). Centrifuge was conducted at 6000 rpm for 5 minutes immediately after the exchange reaction was over.
Figure S3: Subsequent 5th to 7th I-V curves recorded on a Cu3N-NaN3-EDA electrode immersed in a CO2-saturated 0.1 M NaHCO3 solution. Potential scan rate was 5 mV.s-1
Figure S4. Cdl measurements of Cu3N-NaN3 and Cu3N-NaN3-EDA NPs before and after being used as catalysts for the CO2 reduction reaction in a CO2-saturated 0.1 M NaHCO3 solution at potential of -0.7 V vs. RHE for 60 minutes
Figure S5: Chronoamperometry curve of Cu3N-NaN3-EDA electrode for 3 hours in a CO2-saturated 0.1 M NaHCO3 electrolyte solution
Figure S6. TEM images of Cu3N-NaN3 (a) and Cu3N-NaN3-EDA (b) NPs after being used as catalyst for the CO2 reduction reactions in a CO2 saturated 0.1 M NaHCO3 and at -0.7 V vs. RHE for 60 minutes
Figure S7: Electrochemical setup to investigate electrochemical CO2RR
Table S1. Complete cell refinement data of X-ray diffraction patterns of the Cu3N-ODA, Cu3N-NaN3 and Cu3N-NaN3-EDA NPs
Table S2. Complete product distribution obtained from the CO2RR at different potentials employing the Cu3N-NaN3 and Cu3N-NaN3-EDA NPs catalyst electrodes