論文

査読有り
2017年4月

Effects of Second-Metal (Al, V, Co) Doping on the NO Reactivity of Small Rhodium Cluster Cations

JOURNAL OF PHYSICAL CHEMISTRY A
  • Shinichi Hirabayashi
  • ,
  • Masahiko Ichihashi

121
13
開始ページ
2545
終了ページ
2551
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1021/acs.jpca.6b11613
出版者・発行元
AMER CHEMICAL SOC

Reactions of pure and doped rhodium cluster cations, RhnX+ (n = 2-6; X = Al, V, Co, Rh), with NO molecules were investigated at near-thermal energy using a guided ion beam tandem mass spectrometer. We found that the doping with Al and V increases the total reaction cross section mostly. Under single-collision conditions, Rh2N+ reacts with NO to produce Rh2N+ with release of metal monoxide, XO, whereas RhnX+ (n = 3-6) adsorb NO. For the specific clusters RhnAl+ (n = 3 and 4) and RhnV+ (n = 4-6), the NO adsorption is often accompanied by the release of one Rh atom. In addition, we examined the reactions of Rh5X+ (X = Al, V, Co, Rh) with NO under multiple-collision conditions and observed the cluster dioxide formation and the N-2 release, i.e., NO decomposition. Particularly, the V-doping is most effective for decomposition. One possible explanation for the present results is that the formation of a stable dopant metal oxygen bond directly leads to the increase of NO dissociative adsorption energy and the reduction of the energy barrier between the molecular and dissociative adsorption, thereby encouraging the NO decomposition on the small RhnX+ clusters studied.

Web of Science ® 被引用回数 : 9

リンク情報
DOI
https://doi.org/10.1021/acs.jpca.6b11613
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000398880800001&DestApp=WOS_CPL

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