Surface modification enhances the bulk proton conductivity of Prussian blue

Akira Takahashi; Yasuhito Matsubayashi; Atsushi Sakurai; Yutaka Sugiyama; Keiko Noda; Tohru Kawamoto

doi:10.1039/d3cc00629h

Surface modification enhances the bulk proton conductivity of Prussian blue

Chem Commun (Camb). 2023 Apr 20;59(33):4927-4930. doi: 10.1039/d3cc00629h.

Authors

Akira Takahashi¹, Yasuhito Matsubayashi², Atsushi Sakurai¹, Yutaka Sugiyama¹, Keiko Noda¹, Tohru Kawamoto¹

Affiliations

¹ Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba 305-8565, Japan. akira-takahashi@aist.go.jp.
² Device Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba 305-8565, Japan.

PMID: 37010855
DOI: 10.1039/d3cc00629h

Abstract

Surface-modified Prussian blue shows 10² times higher bulk proton conductivity (0.018 S cm^-1) than that of unmodified Prussian blue. This enhancement is attributed to the monolayer adsorption of Na₄[Fe(CN)₆] on the nanoparticle surface, which reduces the surface resistance. Surface modification is an effective strategy for improving bulk proton conductivity.