| Titre : | Temperature and structural dependence of electrochemical activity and fuel cell performance |
| Auteurs : | Jun Jie Niu, Auteur ; Jian Nong Wang, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Acta materialia (Vol. 58 N° 2, Janvier 2010) |
| Article en page(s) : | pp. 408-414 |
| Note générale : | Métallurgie |
| Langues : | Anglais |
| Index. décimale : | 669 (Métallurgie) |
| Tags : | Temperature and structure Electrochemical activity Fuel cell performance |
| 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%232010%23999419997%231562200%23FLA%23&_cdi=5556&_pubType=J&_auth=y&_acct=C000070790&_version=1&_urlVersion=0&_userid=6909337&md5=b76b02a9bf437ba6ba8077be7b9830f5 |
