Grain-Boundary-Free Super-Proton Conduction of a Solution-Processed Prussian-Blue Nanoparticle Film

Kenta Ono, Manabu Ishizaki, Katsuhiko Kanaizuka, Takanari Togashi, Teppei Yamada, Hiroshi Kitagawa, Masato Kurihara

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

A porous crystal family has been explored as alternatives of Nafion films exhibiting super-proton conductivities of ≥10 −2 S cm −1 . Here, the proton-conduction natures of a solution-processed film of nanoparticles (NPs) have been studied and compared to those of a Nafion film. A mono-particle film of Prussian-blue NPs is spontaneously formed on a self-assembled monolayer substrate by a one-step solution process. A low-temperature heating process of the densely packed, pinhole-free mono-particle NP film enables a maximum 10 5 -fold enhancement of proton conductivity, reaching ca. 10 −1 S cm −1 . The apparent highest conductivity, compared to previously reported data of the porous crystal family, remains constant against humidity changes by an improved water-retention ability of the film. In our proposed mechanism, the high-performing solution-processed NP film suggests that heating leads to the self-restoration of hydrogen-bonding networks throughout their innumerable grain boundaries.

Original languageEnglish
Pages (from-to)5531-5535
Number of pages5
JournalAngewandte Chemie - International Edition
Volume56
Issue number20
DOIs
Publication statusPublished - Jan 1 2017

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Protons
Grain boundaries
Nanoparticles
Proton conductivity
Crystals
Industrial heating
Self assembled monolayers
ferric ferrocyanide
Restoration
Atmospheric humidity
Hydrogen bonds
Heating
Water
Substrates
Temperature

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

Cite this

Grain-Boundary-Free Super-Proton Conduction of a Solution-Processed Prussian-Blue Nanoparticle Film. / Ono, Kenta; Ishizaki, Manabu; Kanaizuka, Katsuhiko; Togashi, Takanari; Yamada, Teppei; Kitagawa, Hiroshi; Kurihara, Masato.

In: Angewandte Chemie - International Edition, Vol. 56, No. 20, 01.01.2017, p. 5531-5535.

Research output: Contribution to journalArticle

Ono, Kenta ; Ishizaki, Manabu ; Kanaizuka, Katsuhiko ; Togashi, Takanari ; Yamada, Teppei ; Kitagawa, Hiroshi ; Kurihara, Masato. / Grain-Boundary-Free Super-Proton Conduction of a Solution-Processed Prussian-Blue Nanoparticle Film. In: Angewandte Chemie - International Edition. 2017 ; Vol. 56, No. 20. pp. 5531-5535.
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