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Nafion-free carbon-supported electrocatalysts with superior hydrogen evolution reaction performance by soft templating

  • Efficient water electrolysis requires electrode coatings with high catalytic activity. Platinum efficiently catalyzes the hydrogen evolution reaction in acidic environments, but is a rare and expensive metal. The activity achieved per metal atom can be increased if small Pt particles are dispersed onto electrically conductive, highly accessible and stable support materials. However, the addition of Nafion, a typical binder material used in the manufacture of electrode coatings, can decrease catalytic activity by the blocking of pores and active surface sites. A new approach is reported for the direct synthesis of highly active Nafion-free Pt/C catalyst films consisting of small Pt nanoparticles supported in size-controlled mesopores of a conductive carbon film. The synthesis relies on the co-deposition of suitable Pt and C precursors in the presence of polymer micelles, which act as pore templates. Subsequent carbonization in an inert atmosphere produces porous catalyst films withEfficient water electrolysis requires electrode coatings with high catalytic activity. Platinum efficiently catalyzes the hydrogen evolution reaction in acidic environments, but is a rare and expensive metal. The activity achieved per metal atom can be increased if small Pt particles are dispersed onto electrically conductive, highly accessible and stable support materials. However, the addition of Nafion, a typical binder material used in the manufacture of electrode coatings, can decrease catalytic activity by the blocking of pores and active surface sites. A new approach is reported for the direct synthesis of highly active Nafion-free Pt/C catalyst films consisting of small Pt nanoparticles supported in size-controlled mesopores of a conductive carbon film. The synthesis relies on the co-deposition of suitable Pt and C precursors in the presence of polymer micelles, which act as pore templates. Subsequent carbonization in an inert atmosphere produces porous catalyst films with controlled film thickness, pore size and particle size. The catalysts clearly outperform all Nafion-based Pt/C catalysts reported in the literature, particularly at high current densities.zeige mehrzeige weniger

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Metadaten
Autoren/innen:D. Bernsmeier, M. Bernicke, Erik Ortel, A. Bergmann, Andreas Lippitz, J. Nissen, R. Schmack, P. Strasser, J. Polte, R. Kraehnert
Dokumenttyp:Zeitschriftenartikel
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Deutsch):CHEMELECTROCHEM
Jahr der Erstveröffentlichung:2017
Organisationseinheit der BAM:6 Materialschutz und Oberflächentechnik
6 Materialschutz und Oberflächentechnik / 6.1 Oberflächenanalytik und Grenzflächenchemie
Herausgeber (Institution):ChemPubSoc Europe
Verlag:Wiley Online Library
Verlagsort:Weinheim
Jahrgang/Band:4
Ausgabe/Heft:1
Erste Seite:221
Letzte Seite:229
DDC-Klassifikation:Naturwissenschaften und Mathematik / Chemie / Analytische Chemie
Freie Schlagwörter:Catalysis; Electrochemistry; SAXS; SEM; TEM; XPS
Themenfelder/Aktivitätsfelder der BAM:Analytical Sciences
DOI:https://doi.org/10.1002/celc.201600444
URL:http://onlinelibrary.wiley.com/doi/10.1002/anie.201612422/abstract
URL:https://apps.webofknowledge.com/full_record.do?product=WOS&search_mode=GeneralSearch&qid=10&SID=U1X4mhSL1hzZSA682nJ&page=1&doc=1
ISSN:2196-0216
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:07.04.2017
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:07.04.2017