Single CeO2 nanowire gas sensor supported with Pt nanocrystals:: Gas sensitivity, surface bond states, and chemical mechanism

被引：207
作者：
Liao, L. [1 ]
Mai, H. X. [2 ]
Yuan, Q. [2 ]
Lu, H. B. [1 ]
Li, J. C. [1 ]
Liu, C. [1 ]
Yan, C. H. [2 ]
Shen, Z. X. [3 ]
Yu, T. [3 ]
机构：
[1] Wuhan Univ, Dept Phys, Key Lab Acoust & Photon Mat & Devices, Minist Educ, Wuhan 430072, Peoples R China
[2] Peking Univ, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China
[3] Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637616, Singapore
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 24期
关键词：
D O I：
10.1021/jp7117778
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We present a new type of CeO2 nanodevice in which a single CeO2 nanowire was used as the sensing unit. It was found that incorporation of Pt nanocrystals on CeO2 nanowire could significantly increase the sensor response. A possible mechanism was discussed based on the study of morphology and surface bond states of the nanowire using local electron energy loss spectroscopy and X-ray photoemission spectroscopy. The results provide a pathway to improve the performance of gas sensors with a good understanding of the nanowire's surface physics and chemistry.
引用
收藏
页码：9061 / 9065
页数：5
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