[6a-A401-1~9] 1.4 Energy conversion, storage, resources and environment

[6a-A401-1] Non-Fermi liquids and the design principles of oxygen evolution catalysts

〇Shigeto Hirai¹, Shunsuke Yagi², Wei-Tin Chen³, Tomoya Ohno¹, Hisao Suzuki⁴, Takeshi Matsuda¹ (1.Kitami Inst. Tech., 2.Tokyo Univ., 3.Taiwan Univ., 4.Shizuoka Univ.)

Keywords:oxygen evolution reaction, strongly correlated electron materials, pyrochlore oxides

The oxygen evolution reaction (OER) is a crucial reaction for rechargeable metal-air batteries and direct solar water splitting. We report a remarkably low overpotential of ~150 mV at 10 mA/cm²_disk in alkaline solutions using one of the non-Fermi liquids, Hg₂Ru₂O₇. The outstanding OER performance is realized through the coexistence of localized d-bands with the metallic state that is unique to non-Fermi liquids.The principles of non-Fermi liquids could serve as new design criteria for highly efficient OER catalysts.