Presentation Information
[10a-N203-5]Imaging of the catalytic reaction of platinum-thin-films with hydrogen gas using a terahertz chemical microscope
〇Takuya Yamanaka1, Jin Wang1, Toshihiko Kiwa1 (1.Okayama Univ.)
Keywords:
terahertz,catalytic metal
Hydrogen is expected to play a central role in future energy systems due to its clean and sustainable nature. Thus, developing and evaluating high-performance catalysts is critical. To address these limitations, we developed a terahertz chemical microscope (TCM), an imaging platform that visualizes surface electric potentials with high spatial and temporal resolution. Femtosecond laser irradiation generates photocarriers at the Si interface, modulating the depletion field and emitting THz radiation. THz intensity reflects local surface potential. Scanning the laser yields a two-dimensional image. We deposited Pt thin films on the sensing plate and exposed them to hydrogen. The resulting work function shift, caused by catalytic reaction, was visualized via THz emission changes. This shows TCM’s promise for high-resolution, non-contact catalyst evaluation and combinatorial screening.