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Controllable in Situ Surface Restructuring of Cu Catalysts and Remarkable Enhancement of Their Catalytic Activity
He, Xiaohui; Wang, Yong; Zhang, Xun; Dong, Mei; Wang, Guofu; Zhang, Bingsen; Niu, Yiming; Yao, Siyu; He, Xin; Liu, Haichao
2019-03-01
Source PublicationACS CATALYSIS
ISSN2155-5435
Volume9Issue:3Pages:2213-2221
AbstractSupported metal catalysts play a pivotal role in the production of fuels and chemicals and environmental remediation. However, identification and tailoring of the active metal sites on these catalysts still remain a formidable challenge, primarily due to their dynamic nature in catalytic reactions. Here, we report a simple and effective strategy for tuning supported Cu nanoparticles via controllable in situ surface restructuring to form coordinatively more unsaturated Cu sites, which exhibit a 4-fold increase in catalytic turnover rate and high stability, as probed by the ethanol dehydrogenation reaction. In situ measurements by transmission electron microscopy and X-ray absorption spectroscopy reveal intense phase transformation and consequent dynamic restructuring of Cu nanoparticles, induced by oxidation with temporarily added nitrous oxide and subsequent reduction under reaction conditions. Such restructuring is precisely controlled at the Cu surfaces without altering Cu dispersion, oxidation state, etc., enabling us to unambiguously identify the active sites during catalysis. This strategy, an alternative to many sophisticated synthesis methods, has been shown to be effective for engineering different Cu catalysts and in turn markedly enhancing their catalytic activity for a wide range of reactions varying from alcohol dehydrogenation to methanol steam reforming.
Keywordsupported copper catalysts active metal site surface restructuring in situ characterization activity enhancement
Indexed BySCI
Language英语
WOS IDWOS:000460600600055
PublisherAMER CHEMICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81313
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
He, Xiaohui,Wang, Yong,Zhang, Xun,et al. Controllable in Situ Surface Restructuring of Cu Catalysts and Remarkable Enhancement of Their Catalytic Activity[J]. ACS CATALYSIS,2019,9(3):2213-2221.
APA He, Xiaohui.,Wang, Yong.,Zhang, Xun.,Dong, Mei.,Wang, Guofu.,...&Liu, Haichao.(2019).Controllable in Situ Surface Restructuring of Cu Catalysts and Remarkable Enhancement of Their Catalytic Activity.ACS CATALYSIS,9(3),2213-2221.
MLA He, Xiaohui,et al."Controllable in Situ Surface Restructuring of Cu Catalysts and Remarkable Enhancement of Their Catalytic Activity".ACS CATALYSIS 9.3(2019):2213-2221.
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