論文

査読有り
2016年6月

Nitrogen Molecule Adsorption on Cationic Tantalum Clusters and Rhodium Clusters and Desorption from Their Nitride Clusters Studied by Thermal Desorption Spectrometry

JOURNAL OF PHYSICAL CHEMISTRY A
  • Fumitaka Mafune
  • ,
  • Yuki Tawaraya
  • ,
  • Satoshi Kudoh

120
24
開始ページ
4089
終了ページ
4095
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/acs.jpca.6b03479
出版者・発行元
AMER CHEMICAL SOC

Adsorption and desorption of N-2 molecules onto cationic Ta and Rh clusters in the gas phase were investigated in the temperature range of 300-1000 K by using thermal desorption spectrometry in combination with density functional theory (DFT) calculations. For Ta-6(+), the first N-2 molecule was found to adsorb dissociatively, and it remained adsorbed when Ta6+N2 was heated to 1000 K. In contrast, the second and the subsequent N-2 molecules adsorbed weakly as a molecular form and were released into the gas phase when heated to 600 K. The difference can be explained in terms of the activation barrier between the molecular and dissociative forms. On the other hand, when Ta clusters were generated in the presence of N-2 gas by the laser ablation of a Ta rod, isomeric clusters, TanNm+, having heat resistivity were formed. For R-h(6)+, N-2 adsorbed molecularly at 300 K and desorbed totally at 450 K. These results were consistent with the DFT calculations, indicating that the dissociative adsorption of N-2 is endothermic.

Web of Science ® 被引用回数 : 16

リンク情報
DOI
https://doi.org/10.1021/acs.jpca.6b03479
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000378663200001&DestApp=WOS_CPL