New insights into the support morphology-dependent ammonia synthesis activity of Ru/CeO2 catalysts

被引：163
作者：
Ma, Zhanwei [1 ,2 ]
Zhao, Shengli [1 ,2 ]
Pei, Xiaoping [1 ,2 ]
Xiong, Xumao [1 ]
Hu, Bin [1 ]
机构：
[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
CATALYSIS SCIENCE & TECHNOLOGY | 2017年 / 7卷 / 01期
基金：
中国国家自然科学基金;
关键词：
RU NANOPARTICLES; RUTHENIUM CATALYSTS; CRYSTAL-PLANE; X-RAY; NANOSCALE CERIA; LATTICE STRAIN; CO OXIDATION; CS-RU/C; BARIUM; ACTIVATION;
D O I：
10.1039/c6cy02089e
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：
Three ceria nanocrystals with different morphologies (nanocubes, nanorods, and nanoparticles) were synthesized and used as supports to evaluate the support morphology-dependent ammonia synthesis activity in the structure-sensitive ammonia synthesis reaction. The Ru/r-CeO2 catalyst shows a higher catalytic reaction rate (3830 mu mol g(-1) h) than that of Ru/c-CeO2 (1289 mu mol g(-1) h) and Ru/p-CeO2 (529 mu mol g(-1) h) under the reaction conditions of 400 degrees C, 1 MPa, and 60 mL min(-1). In addition, promoters (Cs, K, and Ba) can effectively enhance the catalytic activity of the catalysts such as 2Cs-Ru/r-CeO2 (14 266 mu mol g(-1) h) and 2K-Ru/r-CeO2 (11227 mu mol g(-1) h). The effect of the morphology of the CeO2 support on the metal-support interaction and catalytic performance of the Ru/CeO2 catalysts can be correlated to the exposed crystal planes and surface composition/electronic structure of the CeO2 support with diverse morphologies.
引用
收藏
页码：191 / 199
页数：9
相关论文
共 51 条
[41]   Support Morphology-Dependent Catalytic Activity of Pd/CeO2 for Formaldehyde Oxidation [J].
Tan, Hongyi ;
Wang, Jin ;
Yu, Shuzhen ;
Zhou, Kebin .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2015, 49 (14) :8675-8682
[42]   Barium-promoted Ru/carbon catalyst for ammonia synthesis: State of the system when operating [J].
Truszkiewicz, Elzbieta ;
Rarog-Pilecka, Wioletta ;
Schmidt-Szatowski, Krzysztof ;
Jodzis, Slawomir ;
Wilczkowska, Ewa ;
Lomot, Dariusz ;
Kaszkur, Zbigniew ;
Karpinski, Zbigniew ;
Kowalczyk, Zbigniew .
JOURNAL OF CATALYSIS, 2009, 265 (02) :181-190
[43]   STRUCTURE AND REACTIVITY OF AMMONIA-SYNTHESIS CATALYSTS DERIVED FROM CERU2 PRECURSORS - A STUDY BY INSITU X-RAY ABSORPTION-SPECTROSCOPY [J].
WALKER, AP ;
RAYMENT, T ;
LAMBERT, RM ;
OLDMAN, RJ .
JOURNAL OF CATALYSIS, 1990, 125 (01) :67-76
[44]   PROPERTIES OF THE RU(0001)/CE-H2 INTERFACE - A MODEL SYSTEM FOR TRANSITION-METAL RARE-EARTH HYDRIDE CATALYSTS [J].
WALKER, AP ;
LAMBERT, RM .
JOURNAL OF PHYSICAL CHEMISTRY, 1992, 96 (05) :2265-2271
[45]   A CONTROLLED-ATMOSPHERE INSITU X-RAY-DIFFRACTION STUDY OF THE ACTIVATION AND PERFORMANCE OF AMMONIA-SYNTHESIS CATALYSTS DERIVED FROM CERU2, CECO2, AND CEFE2 [J].
WALKER, AP ;
RAYMENT, T ;
LAMBERT, RM .
JOURNAL OF CATALYSIS, 1989, 117 (01) :102-120
[46]   Catalytic behavior of supported Ru nanoparticles on the {100}, {110}, and {111} facet of CeO2 [J].
Wang, Fei ;
Li, Changming ;
Zhang, Xiaoyu ;
Wei, Min ;
Evans, David G. ;
Duan, Xue .
JOURNAL OF CATALYSIS, 2015, 329 :177-186
[47]   Origin of Photocatalytic Activity of Nitrogen-Doped TiO2 Nanobelts [J].
Wang, Jin ;
Tafen, De Nyago ;
Lewis, James P. ;
Hong, Zhanglian ;
Manivannan, Ayyakkannu ;
Zhi, Mingjia ;
Li, Ming ;
Wu, Nianqiang .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2009, 131 (34) :12290-12297
[48]   Crystal-plane effect of nanoscale CeO2 on the catalytic performance of Ni/CeO2 catalysts for methane dry reforming [J].
Wang, Ning ;
Qian, Weizhong ;
Chu, Wei ;
Wei, Fei .
CATALYSIS SCIENCE & TECHNOLOGY, 2016, 6 (10) :3594-3605
[49]   Surface potentials of (111), (110) and (100) oriented CeO2-x thin films [J].
Wardenga, Hans F. ;
Klein, Andreas .
APPLIED SURFACE SCIENCE, 2016, 377 :1-8
[50]   Effect of subsurface oxygen on the reactivity of the Ag(111) surface [J].
Xu, Y ;
Greeley, J ;
Mavrikakis, M .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (37) :12823-12827
123456