[8p-E202-1~14] 1.4 Energy conversion, storage, resources and environment

1:45 PM - 2:00 PM JST(4:45 AM - 5:00 AM UTC)

[8p-E202-2] Electronic Structure in Amorphous Carbon as a Pt-Free Catalyst measured by XAFS

〇Hiroyuki Okazaki¹, Subaru Nakashima², Yuji Muraoka³, Tetsuya Yamaki¹ (1.QST, 2.ELST. Okayama Univ., 3.RIIS Okayama Univ.)

Keywords:

Fuel Cells,Pt free Catalyst,Amorphous Carbon

The development of Pt-free catalysts for the oxygen reduction reaction (ORR) is essential for the widespread deployment of proton exchange membrane fuel cells (PEMFCs). We have previously reported that amorphous carbon, a novel carbon material, exhibits ORR activity based on electrochemical measurements; however, the origin of this activity remains unclear. In this study, X-ray absorption fine structure (XAFS) measurements were performed at the NanoTerasu to investigate the local electronic structure of amorphous carbon. Analysis of the C K-edge spectra reveals characteristic electronic structure compared to other carbon materials. These features are considered to play a key role in oxygen adsorption and reduction processes.