[16a-S4_203-1~12] 7.2 Applications and technologies of electron beams

12:00 PM - 12:15 PM JST(3:00 AM - 3:15 AM UTC)

[16a-S4_203-12] Electrochemical Liquid Cell STEM Observation of Alkaline Water Electrolysis OER Catalysts

〇Masaki Takeguchi¹, Reona Suzuki², Keisuke Obata², Kazuhiro Takanabe² (1.NIMS, 2.UTokyo)

Keywords:

alkaline water electrolysis,liquid cell transmission electron microscopy

FIB-prepared LaNiO₃/NF, OER catalyst for alkaline water electrolysis, was transferred onto a working electrode in an electrochemical liquid cell dedicated to LC-(S)TEM, and then observed by in-situ STEM during OER reaction in KOH solution. On the OER condition, oxygen bubble evolution and structural change of a LaNiO₃ particle layer followed by its detachment was observed. Results of in-situ STEM observation of the process will also be reported.