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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 Publication | ACS CATALYSIS
 |
| ISSN | 2155-5435 |
| Volume | 9Issue:3Pages:2213-2221 |
| Abstract | Supported 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. |
| Keyword | supported copper catalysts active metal site surface restructuring in situ characterization activity enhancement |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000460600600055 |
| Publisher | AMER CHEMICAL SOC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://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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