http://www.cnr.it/ontology/cnr/individuo/prodotto/ID48130

Pd-Co Carbon-Nitride Electrocatalysts for Polymer Electrolyte Fuel Cells. (Articolo in rivista)

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Label

Pd-Co Carbon-Nitride Electrocatalysts for Polymer Electrolyte Fuel Cells. (Articolo in rivista) (literal)

Anno

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

Alternative label

Vito Di Noto (a,b), Enrico Negro (a), Sandra Lavina (a), Silvia Gross (b), Giuseppe Pace (c) (2007)
Pd-Co Carbon-Nitride Electrocatalysts for Polymer Electrolyte Fuel Cells.
in Electrochimica acta
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Vito Di Noto (a,b), Enrico Negro (a), Sandra Lavina (a), Silvia Gross (b), Giuseppe Pace (c) (literal)

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Note

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a Dipartimento di Scienze Chimiche, Universit`a di Padova, Via Marzolo 1, I-35131 Padova (Pd), Italy b Istituto di Scienze e Tecnologie Molecolari, ISTM-CNR, Dipartimento di Scienze Chimiche, Via Marzolo 1, I-35131 Padova (Pd), Italy c Istituto di Scienze e Tecnologie Molecolari, ISTM-CNR c/o Dipartimento di Processi Chimici dell'Ingegneria, Via Marzolo 9, I-35131 Padova (Pd), Italy (literal)

Titolo

Pd-Co Carbon-Nitride Electrocatalysts for Polymer Electrolyte Fuel Cells. (literal)

Abstract

In this paper is described the preparation of new platinum-free Pd-Co carbon-nitride electrocatalysts (Pd-Co-CNs) for application in lowtemperature fuel cells. Two groups of materials with formula Kn[PdxCoyCzNlHm] were synthesized, which are grouped in two ensembles: the first is characterized by a molar ratio y/x > 1 (I), and the second by y/x < 1 (II). Kn[PdxCoyCzNlHm] materials were prepared through a two-step synthesis protocol. The effect of the Pd/Co molar ratio and of the temperature of the thermal treatments on the structure and properties of the products were studied extensively by thermogravimetry, scanning electron microscopy, and vibrational (FT-IR and micro-Raman) and XPS spectroscopy. Vibrational studies revealed that I and II systems consist of two polymorphs of ?- and graphitic-like carbon-nitride nanomaterials. The electrochemical activity towards the oxygen reduction reaction (ORR) and the hydrogen oxidation reaction (HOR) was measured by cyclic voltammetry measurements with thin-film rotating disk electrode (CV-TF-RDE). The electrochemical performance of Pd-Co-CNs of group I obtained at tf >=700 oC resulted higher than that measured for a platinum-based commercial electrocatalyst in terms of both the activity towards the ORR and the HOR and of the resistance towards the poisoning effect of methanol towards the ORR. © 2007 Elsevier Ltd. All rights reserved. (literal)

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