91 resultados para safe deposit box
Filtro por publicador
- JISC Information Environment Repository (3)
- Aberystwyth University Repository - Reino Unido (4)
- Academic Archive On-line (Stockholm University; Sweden) (1)
- Academic Research Repository at Institute of Developing Economies (2)
- Acceda, el repositorio institucional de la Universidad de Las Palmas de Gran Canaria. España (2)
- AMS Tesi di Laurea - Alm@DL - Università di Bologna (6)
- Applied Math and Science Education Repository - Washington - USA (1)
- Aquatic Commons (8)
- ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (5)
- Archive of European Integration (4)
- Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco (2)
- Avian Conservation and Ecology - Eletronic Cientific Hournal - Écologie et conservation des oiseaux: (1)
- Biblioteca Digital | Sistema Integrado de Documentación | UNCuyo - UNCUYO. UNIVERSIDAD NACIONAL DE CUYO. (1)
- Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (11)
- Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (BDPI/USP) (6)
- BORIS: Bern Open Repository and Information System - Berna - Suiça (91)
- Boston University Digital Common (13)
- Brock University, Canada (12)
- Bucknell University Digital Commons - Pensilvania - USA (3)
- CaltechTHESIS (1)
- Cambridge University Engineering Department Publications Database (35)
- CentAUR: Central Archive University of Reading - UK (40)
- Center for Jewish History Digital Collections (4)
- Chinese Academy of Sciences Institutional Repositories Grid Portal (93)
- Clark Digital Commons--knowledge; creativity; research; and innovation of Clark University (1)
- Cochin University of Science & Technology (CUSAT), India (3)
- Collection Of Biostatistics Research Archive (1)
- Comissão Econômica para a América Latina e o Caribe (CEPAL) (6)
- CORA - Cork Open Research Archive - University College Cork - Ireland (1)
- Dalarna University College Electronic Archive (8)
- Deakin Research Online - Australia (84)
- Department of Computer Science E-Repository - King's College London, Strand, London (1)
- DI-fusion - The institutional repository of Université Libre de Bruxelles (2)
- Digital Commons - Montana Tech (8)
- Digital Commons @ DU | University of Denver Research (1)
- Digital Peer Publishing (2)
- Digital Repository at Iowa State University (4)
- DigitalCommons - The University of Maine Research (5)
- DigitalCommons@The Texas Medical Center (11)
- DigitalCommons@University of Nebraska - Lincoln (4)
- Digitale Sammlungen - Goethe-Universität Frankfurt am Main (1)
- DRUM (Digital Repository at the University of Maryland) (1)
- Duke University (4)
- eResearch Archive - Queensland Department of Agriculture; Fisheries and Forestry (7)
- Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (1)
- Greenwich Academic Literature Archive - UK (4)
- Harvard University (2)
- Helda - Digital Repository of University of Helsinki (2)
- Indian Institute of Science - Bangalore - Índia (14)
- Instituto Politécnico do Porto, Portugal (6)
- Lume - Repositório Digital da Universidade Federal do Rio Grande do Sul (2)
- Massachusetts Institute of Technology (2)
- Ministerio de Cultura, Spain (16)
- National Center for Biotechnology Information - NCBI (23)
- Plymouth Marine Science Electronic Archive (PlyMSEA) (6)
- Publishing Network for Geoscientific & Environmental Data (132)
- QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (68)
- Queensland University of Technology - ePrints Archive (116)
- RepoCLACAI - Consorcio Latinoamericano Contra el Aborto Inseguro (5)
- Repositório digital da Fundação Getúlio Vargas - FGV (1)
- Repositório Institucional da Universidade de Aveiro - Portugal (1)
- Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (32)
- Research Open Access Repository of the University of East London. (1)
- RUN (Repositório da Universidade Nova de Lisboa) - FCT (Faculdade de Cienecias e Technologia), Universidade Nova de Lisboa (UNL), Portugal (2)
- School of Medicine, Washington University, United States (2)
- Universidad de Alicante (1)
- Universidad del Rosario, Colombia (1)
- Universidad Politécnica de Madrid (16)
- Universidade Federal do Pará (4)
- Universitat de Girona, Spain (1)
- Universitätsbibliothek Kassel, Universität Kassel, Germany (1)
- Université de Lausanne, Switzerland (5)
- Université de Montréal, Canada (5)
- University of Connecticut - USA (7)
- University of Michigan (7)
- University of Southampton, United Kingdom (6)
Resumo:
In this study, the correlation between the impregnation of proton exchange membrane fuel cell catalysts with perfluorosulfonate-ionomer (PFSI) and its electrochemical and electrocatalytic properties is investigated for different Pt loadings and carbon supports using a rotating-disk electrode (RDE) setup. We concentrate on its influence on the electrochemical surface area (ECSA) and the oxygen reduction reaction (ORR) activity. For this purpose, platinum (Pt) nanoparticles are prepared via a colloidal based preparation route and supported on three different carbon supports. Based on RDE experiments, we show that the ionomer has an influence both on the Pt utilization and the apparent kinetic current density of ORR. The experimental data reveal a strong interaction in the microstructure between the electrochemical properties and the surface properties of the carbon supports, metal loading and ionomer content. This study demonstrates that the colloidal synthesis approach offers interesting potential for systematic studies for the optimization of fuel cell catalysts.