Enhancement of the Catalytic Effect on the Electrochemical Conversion of CO<sub>2</sub> to Formic Acid Using MXene (Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>)-Modified Boron-Doped Diamond Electrode
Prastika Krisma Jiwanti,
Asmaul Mashad Alfaza,
Grandprix T. M. Kadja,
Suci A. C. Natalya,
Fuja Sagita,
Yasuaki Einaga,
Aning Purwaningsih,
Ilma Amalina,
Intan Nurul Rizki
Affiliations
Prastika Krisma Jiwanti
Nanotechnology Engineering, Faculty of Advanced Technology and Multidiscipline, Airlangga University, Surabaya 60115, Indonesia
Asmaul Mashad Alfaza
Department of Chemistry, Faculty of Science and Technology, Airlangga University, Surabaya 60115, Indonesia
Grandprix T. M. Kadja
Division of Inorganic and Physical Chemistry, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha No. 10, Bandung 40132, Indonesia
Suci A. C. Natalya
Division of Inorganic and Physical Chemistry, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha No. 10, Bandung 40132, Indonesia
Fuja Sagita
Division of Inorganic and Physical Chemistry, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha No. 10, Bandung 40132, Indonesia
Yasuaki Einaga
Department of Chemistry, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan
Aning Purwaningsih
Department of Chemistry, Faculty of Science and Technology, Airlangga University, Surabaya 60115, Indonesia
Ilma Amalina
Nanotechnology Engineering, Faculty of Advanced Technology and Multidiscipline, Airlangga University, Surabaya 60115, Indonesia
Intan Nurul Rizki
Nanotechnology Engineering, Faculty of Advanced Technology and Multidiscipline, Airlangga University, Surabaya 60115, Indonesia
The rising concentration of carbon dioxide (CO2) as one of the greenhouse gases in the atmosphere is a major source of worry. Electrochemical reduction of CO2 is one of many ways to convert CO2 gas into usable compounds. An electrochemical technique was applied in this study to reduce CO2 using a boron-doped diamond (BDD) working electrode modified with MXene (Ti3C2Tx) material to improve electrode performance. MXene concentrations of 0.5 mg/mL (MXene-BDD 0.5), 1.0 mg/mL (MXene-BDD 1.0), and 2.0 mg/mL (MXene-BDD 2.0) were drop-casted onto the BDD surface. MXene was effectively deposited on top of the BDD surface, with Ti weight loads of 0.12%, 4.06%, and 7.14% on MXene-BDD 0.5, MXene-BDD 1.0, and MXene-BDD 2.0, respectively. The modified working electrode was employed for CO2 electroreduction with optimal CO2 gas aeration. The existence of the MXene substance in BDD reduced the electroreduction overpotential of CO2. For the final result, we found that the MXene-BDD 2.0 electrode effectively generated the most formic acid product with a maximum reduction potential as low as −1.3 V (vs. Ag/AgCl).
