[3E01-11] Surface Science / Chemical Property (SS2)

9:00 AM - 9:15 AM JST(12:00 AM - 12:15 AM UTC)

[3E01] Electrocatalytic nitrous oxide reduction by nickel–dithiolene complexes

*Taichi KOBAYASHI¹, Masaru Kato^1,2, Naoto Kuwamura³, Ichizo Yagi^1,2 (1. Division of Environmental Materials Science, Graduate School of Environmental Science, Hokkaido University (Japan), 2. Faculty of Environmental Earth Science, Hokkaido University (Japan), 3. Division of Liberal Arts, Center for Promotion of Higher Education, Kogakuin University (Japan))

The development of electrocatalysts based on inexpensive and earth-abundant metals for the electrochemical nitrous oxide reduction reaction (eN₂ORR) is highly desirable. In this study, we prepared carbon-supported nickel complexes with diaryldithiolene ligands with a methoxy group and investigated effects of the substituent position on the electrocatalytic activity for the eN₂ORR. Cyclic voltammetry revealed that the nickel complex with the methoxy group at the ortho position exhibited higher electrocatalytic activity than the para or meta-complexes. Potential dependence of X-ray absorption spectra revealed the reduction process involving the redox-active dithiolene ligand, rather than the Ni center, initiating the eN₂ORR.

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