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Enhancement of Proton Transport in an Oriented Polypeptide Thin Film

Nagao, Yuki und Matsui, Jun und Abe, Takashi und Hiramatsu, Hirotsugu und Yamamoto, Hitoshi und Miyashita, Tokuji und Sata, Noriko und Yugami, Hiroo (2013) Enhancement of Proton Transport in an Oriented Polypeptide Thin Film. Langmuir, 29, Seiten 6798-6804. ACS Publications. DOI: 10.1021/la400412f. ISSN 0743-7463.

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Kurzfassung

Proton transport properties of a partially protonated poly(aspartic acid)/sodium polyaspartate (P-Asp) were investigated. A remarkable enhancement of proton conductivity has been achieved in the thin film. Proton conductivity of 60-nm-thick thin film prepared on MgO(100) substrate was 3.4 × 10−3 S cm−1 at 298 K. The electrical conductivity of the oriented thin film was 1 order of magnitude higher than the bulk specimen, and the activation energies for the proton conductivity were 0.34 eV for the oriented thin film and 0.65 eV for the pelletized sample, respectively. This enhancement of the proton transport is attributable to the highly oriented structure on MgO(100) substrate. This result proposes great potential for a new strategy to produce a highly proton-conductive material using the concept of an oriented thin film structure without strong acid groups.

Dokumentart:Zeitschriftenbeitrag
Titel:Enhancement of Proton Transport in an Oriented Polypeptide Thin Film
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Nagao, YukiSchool of Materials Science, Japan Advanced Institute of Science and Technology
Matsui, JunInstitute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University
Abe, TakashiGraduate School of Science and Technology, Niigata University
Hiramatsu, HirotsuguGraduate School of Pharmaceutical Sciences, Tohoku University
Yamamoto, HitoshiDepartment of Safety and Hygiene, Osaka University
Miyashita, TokujiInstitute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University
Sata, NorikoInstitute of Technical Thermodynamics, German Aerospace Center (DLR)
Yugami, HirooGraduate School of Engineering, Tohoku University
Datum:30 Mai 2013
Erschienen in:Langmuir
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:29
DOI :10.1021/la400412f
Seitenbereich:Seiten 6798-6804
Verlag:ACS Publications
ISSN:0743-7463
Status:veröffentlicht
Stichwörter:proton transport, polypeptide thin film, PEFC, infrared reflection absorption spectroscopy
HGF - Forschungsbereich:Energie
HGF - Programm:Rationelle Energieumwandlung und Nutzung
HGF - Programmthema:Brennstoffzelle
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E EV - Energieverfahrenstechnik
DLR - Teilgebiet (Projekt, Vorhaben):E - Elektrochemische Prozesse
Standort: Stuttgart
Institute & Einrichtungen:Institut für Technische Thermodynamik > Elektrochemische Energietechnik
Hinterlegt von: Dr. Noriko Metzger-Sata
Hinterlegt am:30 Okt 2013 12:17
Letzte Änderung:12 Dez 2013 22:14

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