2024 年 67 巻 5 号 p. 206-211
The local imaging technique, which is able to directly visualize the catalytic activity originating from the structural heterogeneity of the catalyst, is significantly required to provide the guidelines for the development of the new catalyst with an ability of efficient activity. Scanning electrochemical cell microscopy (SECCM) is one of the promising candidates because of the ability to obtain the distribution of redox activity on the sub-microscale by forming the meniscus on the sample surface using a nanopipette. We have so far developed single-barrel SECCM to further improve its spatial resolution. In addition, we have applied this technique to various catalysts, for instance, MoS2 and SnS2 nanosheets and TiO2 nanotube. Here, we present the principle and setup of single-barrel SECCM and its applications to the chemistry of catalysis.
