The Ce-Zr-La-O solid solution was prepared by the sol-gel method. Thestructure and the redox behavior of Ce-Zr-La-O solid solution and CuO/Ce-Zr-La-O catalysts wereinvestigated by using XRD, Raman and TPR techniques. ...The Ce-Zr-La-O solid solution was prepared by the sol-gel method. Thestructure and the redox behavior of Ce-Zr-La-O solid solution and CuO/Ce-Zr-La-O catalysts wereinvestigated by using XRD, Raman and TPR techniques. The result shows that the reduction capabilityof Ce_(0.7)Zr_(0.3-y)La_yO solid solution is related to content of La. Appropriate content of La canenhance the redox capability of the solid solution. The oxidation activity of the CuO (6 percent)/Ce_(0.7)Zr_(0.15)La_(0.15)O catalyst is the highest. CuO, which finely dispersed and interacted withthe support, is the site of oxidation activity.展开更多
Hematite(α-Fe_(2)O_(3))with well-defined plate,cube and rod morphologies has been successfully synthesized,which predominantly exposes the(001),(012)and(110)facets,respectively.Rod-likeα-Fe_(2)O_(3)with exposed(110)...Hematite(α-Fe_(2)O_(3))with well-defined plate,cube and rod morphologies has been successfully synthesized,which predominantly exposes the(001),(012)and(110)facets,respectively.Rod-likeα-Fe_(2)O_(3)with exposed(110)facets showed a greater CO catalytic activity than catalysts with all other morphologies.展开更多
The interface between a two-dimensional(2D)atomic crystal and a metal surface can be regarded as a nanoreactor, in which molecule adsorption and catalytic reactions may occur. In this work, we demonstrate that oxygen ...The interface between a two-dimensional(2D)atomic crystal and a metal surface can be regarded as a nanoreactor, in which molecule adsorption and catalytic reactions may occur. In this work, we demonstrate that oxygen intercalation and desorption occur at the interface between hexagonal boron nitride(h-BN) overlayer and Pt(111) surface by using near-ambient pressure X-ray photoelectron spectroscopy(NAP-XPS), photoemission electron microscopy, and low-energy electron microscopy.Furthermore, CO oxidation under the h-BN cover was also observed by NAP-XPS. The present results indicate that the nanospace under the 2D cover can be used for surface reactions, in which novel surface chemistry may be induced by the nanoconfinement effect.展开更多
文摘The Ce-Zr-La-O solid solution was prepared by the sol-gel method. Thestructure and the redox behavior of Ce-Zr-La-O solid solution and CuO/Ce-Zr-La-O catalysts wereinvestigated by using XRD, Raman and TPR techniques. The result shows that the reduction capabilityof Ce_(0.7)Zr_(0.3-y)La_yO solid solution is related to content of La. Appropriate content of La canenhance the redox capability of the solid solution. The oxidation activity of the CuO (6 percent)/Ce_(0.7)Zr_(0.15)La_(0.15)O catalyst is the highest. CuO, which finely dispersed and interacted withthe support, is the site of oxidation activity.
基金supported by the National Natural Science Foundation of China(Grant No.21671085 and 21701063)the Jiangsu Province Science Foundation for Youths(BK20150237)+2 种基金the Natural Science Foundation of Jiangsu Province(BK20161160)the graduate education innovation project of Jiangsu province(KYCX17-1585)the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.
文摘Hematite(α-Fe_(2)O_(3))with well-defined plate,cube and rod morphologies has been successfully synthesized,which predominantly exposes the(001),(012)and(110)facets,respectively.Rod-likeα-Fe_(2)O_(3)with exposed(110)facets showed a greater CO catalytic activity than catalysts with all other morphologies.
基金supported by the National Natural Science Foundation of China(21222305,21373208,and21033009)the National Basic Research Program of China(2011CB932704,2013CB933100,and 2013CB834603)+1 种基金the Key Research Program of the Chinese Academy of Science(KGZD-EWT05)The Advanced Light Source and beamlines 11.0.2 and 9.3.1 are supported by the Director,Office of Energy Research,Office of Basic Energy Sciences,and Chemical Sciences Division of the US Department of Energy under contracts No.DE-AC02-05CH11231
文摘The interface between a two-dimensional(2D)atomic crystal and a metal surface can be regarded as a nanoreactor, in which molecule adsorption and catalytic reactions may occur. In this work, we demonstrate that oxygen intercalation and desorption occur at the interface between hexagonal boron nitride(h-BN) overlayer and Pt(111) surface by using near-ambient pressure X-ray photoelectron spectroscopy(NAP-XPS), photoemission electron microscopy, and low-energy electron microscopy.Furthermore, CO oxidation under the h-BN cover was also observed by NAP-XPS. The present results indicate that the nanospace under the 2D cover can be used for surface reactions, in which novel surface chemistry may be induced by the nanoconfinement effect.
