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Temperature and structural dependence of electrochemical activity and fuel cell performance / Jun Jie Niu in Acta materialia, Vol. 58 N° 2 (Janvier 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 2 (Janvier 2010) . - pp. 408-414 Titre : Temperature and structural dependence of electrochemical activity and fuel cell performance Type de document : texte imprimé Auteurs : Jun Jie Niu, Auteur ; Jian Nong Wang, Auteur Article en page(s) : pp. 408-414 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Temperature  and  structure  Electrochemical  activity  Fuel  cell  performance Index. décimale : 669 Métallurgie Résumé : The dependence on temperature and structure of the electrochemical activity of a catalyst supported on hollow carbon nanocages (HCNCs) with large scales (>5 g h–1) by a simple N2-bubbling floating method is discussed. The effect of gas flow on an HCNC-supported catalyst was systematically studied in our previous work. Here we specify the electrocatalytic activity of the samples with different temperatures and graphite structures under 900 and 1000°C by cyclic voltammograms. The peak current density of H2-adsorption/desorption is four times higher than that of the commercial Pt/C (Vulcan XC-72). Besides the comparison with commercial carbon, the fuel cell performance was measured. The single fuel cell test for Pt/HCNCs showed a high turn-on voltage of 0.9 V and a relatively high power density of 0.13 W cm–2 under a low temperature of 60 °C and a low gas pressure of 1 atm. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235556%23 [...] [article] Temperature and structural dependence of electrochemical activity and fuel cell performance [texte imprimé] / Jun Jie Niu, Auteur ; Jian Nong Wang, Auteur . - pp. 408-414. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 2 (Janvier 2010) . - pp. 408-414 Mots-clés : Temperature  and  structure  Electrochemical  activity  Fuel  cell  performance Index. décimale : 669 Métallurgie Résumé : The dependence on temperature and structure of the electrochemical activity of a catalyst supported on hollow carbon nanocages (HCNCs) with large scales (>5 g h–1) by a simple N2-bubbling floating method is discussed. The effect of gas flow on an HCNC-supported catalyst was systematically studied in our previous work. Here we specify the electrocatalytic activity of the samples with different temperatures and graphite structures under 900 and 1000°C by cyclic voltammograms. The peak current density of H2-adsorption/desorption is four times higher than that of the commercial Pt/C (Vulcan XC-72). Besides the comparison with commercial carbon, the fuel cell performance was measured. The single fuel cell test for Pt/HCNCs showed a high turn-on voltage of 0.9 V and a relatively high power density of 0.13 W cm–2 under a low temperature of 60 °C and a low gas pressure of 1 atm. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235556%23 [...]