Electrocatalyst Preparation and Characterization for CO2 Reduction: Materials and Methods

This study employed a series of materials to prepare and characterize an electrocatalyst for the reduction of carbon dioxide (CO2). The materials and their sources are outlined below.

Electrocatalyst Synthesis:

• Ammonium tetrathiomolybdate (≥99.95%) was sourced from Shanghai McLean Biochemical Technology Co., Ltd.
• Silver nitrate (AR) was obtained from Guangdong Wengjiang Chemical Reagent Co., Ltd.

Electrocatalyst Purification:

• Ethanolamine (AR) was purchased from Tianjin Kemiou Chemical Reagent Co., Ltd.

Electrocatalyst Immobilization:

• Anhydrous ethanol (AR) was obtained from Tianjin Damao Chemical Reagent Factory.
• Deionized water was used to dissolve the catalyst.
• Nafion solution (5 wt.%) (AR) was supplied by DuPont.
• Carbon nanotubes (≥95%) were sourced from Zhengzhou Alpha Chemical Co., Ltd.

Electrochemical Characterization:

• Sulfuric acid (AR) was supplied by Tianjin Damao Chemical Reagent Factory.
• 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim]BF4) (≥98%) and tetrabutylammonium tetrafluoroborate (TBABF4) (≥98%) were sourced from Shanghai McLean Biochemical Technology Co., Ltd. These materials were used to construct an H-type electrolyzer for electrochemical analysis.

Gas Sources:

• Carbon dioxide (CO2) and helium gas (He) (both ≥99.99%) were purchased from Baoding Jinglian Gas Plant.