气候变化领域集成服务门户(CCPortal): A chemiresistive methane sensor

CCPortal

DOI	10.1073/pnas.2022515118
	A chemiresistive methane sensor
	Bezdek M.J.; Luo S.-X.L.; Ku K.H.; Swager T.M.
发表日期	2021
ISSN	00278424
卷号	118 期号:2
英文摘要	A chemiresistive sensor is described for the detection of methane (CH4), a potent greenhouse gas that also poses an explosion hazard in air. The chemiresistor allows for the low-power, low-cost, and distributed sensing of CH4 at room temperature in air with environmental implications for gas leak detection in homes, production facilities, and pipelines. Specifically, the chemiresistors are based on single-walled carbon nanotubes (SWCNTs) noncovalently functionalized with poly(4-vinylpyridine) (P4VP) that enables the incorporation of a platinum-polyoxometalate (Pt-POM) CH4 oxidation precatalyst into the sensor by P4VP coordination. The resulting SWCNT-P4VP-Pt-POM composite showed ppm-level sensitivity to CH4 and good stability to air as well as time, wherein the generation of a high-valent platinum intermediate during CH4 oxidation is proposed as the origin of the observed chemiresistive response. The chemiresistor was found to exhibit selectivity for CH4 over heavier hydrocarbons such as n-hexane, benzene, toluene, and o-xylene, as well as gases, including carbon dioxide and hydrogen. The utility of the sensor in detecting CH4 using a simple handheld multimeter was also demonstrated. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Catalysis; Chemiresistors; Methane; Selectors; Sensor
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/181057
作者单位	Department of Chemistry, Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
推荐引用方式 GB/T 7714	Bezdek M.J.,Luo S.-X.L.,Ku K.H.,et al. A chemiresistive methane sensor[J],2021,118(2).
APA	Bezdek M.J.,Luo S.-X.L.,Ku K.H.,&Swager T.M..(2021).A chemiresistive methane sensor.Proceedings of the National Academy of Sciences of the United States of America,118(2).
MLA	Bezdek M.J.,et al."A chemiresistive methane sensor".Proceedings of the National Academy of Sciences of the United States of America 118.2(2021).