BORON-DOPED DIAMOND COMPOSITE BASED ELECTROCATALYST AND TI3C2 MXENE NANOSHEETS FOR HYDROGEN EVOLUTION REACTIONS

• Main Author: Ikramullah, Fariz
• Format: Final Project
• Language: Indonesia
• Subjects: Kimia
• Online Access: https://digilib.itb.ac.id/gdl/view/85753
• Institution: Institut Teknologi Bandung

Hydrogen has many uses in industrial applications with its versatile, clean and renewable properties. The increasing need for hydrogen gas means its production is carried out on a large scale, however, currently it still uses conventional methods which are difficult to be environmentally friendly. Another hydrogen production method was found, namely water electrolysis, which guaranteed to be cleaner and more environmentally friendly, but this method was quite slow in development and production, so generally a catalyst was needed that could speed up the reaction. MXene Ti3C2 is an electrocatalyst material which can accelerate the hydrogen evolution reaction (HER) based on nanosheet material. The aim is to create an electrocatalyst based on MXene Ti3C2 nanosheet material which will later be able to accelerate the hydrogen evolution reaction in producing hydrogen which can be useful for industrial purposes on a large scale. Nano materials are generally suitable for being catalysts for reactions because they have a large enough surface area due to the presence of complete cavities in the body of the material, uniform particle size, etc., so their use is increasing and is really needed at this time, especially on a large scale. large enough. In this research, the initial step taken was to make MXene from inorganic carbide material (MAX) using LiF and HCl. After that, sonication was carried out for 10 hours to obtain a 2D layer of MXene. In this research, the synthesis of MXene Ti3C2 from the MAX phase Ti3AlC2 has been successfully carried out. This is based on X-Ray Diffraction (XRD) characterization which shows that there is a decrease in peak intensity at 40,7o and 39,5o . The sheet structure was also shown based on the results of Scanning Electron Microscope (SEM) characterization. In this experiment, a Boron- doped diamond (BDD) composite electrode was used on top of a Silicon Thin Film with a modification of the MXene Ti3C2 concentration. Next, Linear Sweep Voltammetry (LSV), Cyclic Voltammetry (CV), Electrochemical Surface Area (ECSA), and Tafel slope tests were carried out. In addition, a 100x Cyclic Voltammetry test was also carried out to see the stability of each modification. In LSV it was found that the overpotential values of Bare BDD, BDD-M-250, BDD-M-500, BDD-M-750, and BDD- M-1000 were respectively 540 mV, 326 mV, 205 mV, 182 mV , and 164 mV in each modification, as well as Tafel Slope of 67 mV/dec, 60 mV/dec, 57 mV/dec, 55 mV/dec, and 51 mV/dec in each modification.