Journal ArticleDOI
Construction of Active Site in a Sintered Copper-Ceria Nanorod Catalyst.
Wen-Zhu Yu,Wei-Wei Wang,Shan-Qing Li,Xin-Pu Fu,Xu Wang,Ke Wu,Ke Wu,Rui Si,Chao Ma,Chun-Jiang Jia,Chun-Hua Yan,Chun-Hua Yan +11 more
TLDR
Based on a comprehensive structural characterization and mechanistic study, the copper atoms with unsaturated coordination in the form of Cu1O3 were identified to be the sole active site, at which both CO and O2 molecules were activated, thus inducing remarkable CO oxidation activity with a very low copper loading.Abstract:
The construction of stable active site in nanocatalysts is of great importance but is a challenge in heterogeneous catalysis. Unexpectedly, coordination-unsaturated and atomically dispersed copper species were constructed and stabilized in a sintered copper-ceria catalyst through air-calcination at 800 °C. This sintered copper-ceria catalyst showed a very high activity for CO oxidation with a CO consumption rate of 6100 μmolCO·gCu-1·s-1 at 120 °C, which was at least 20 times that of other reported copper catalysts. Additionally, the excellent long-term stability was unbroken under the harsh cycled reaction conditions. Based on a comprehensive structural characterization and mechanistic study, the copper atoms with unsaturated coordination in the form of Cu1O3 were identified to be the sole active site, at which both CO and O2 molecules were activated, thus inducing remarkable CO oxidation activity with a very low copper loading (1 wt %).read more
Citations
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Journal ArticleDOI
Single-Atom Catalysts Based on the Metal-Oxide Interaction.
Rui Lang,Rui Lang,Xiaorui Du,Yike Huang,Yike Huang,Xunzhu Jiang,Xunzhu Jiang,Qian Zhang,Qian Zhang,Yalin Guo,Yalin Guo,Liu Kaipeng,Liu Kaipeng,Botao Qiao,Aiqin Wang,Tao Zhang +15 more
TL;DR: In this review, oxide supported single-atom catalysts are discussed about their synthetic procedures, characterizations, and reaction mechanism in thermocatalysis, such as water-gas shift reaction, selective oxidation/hydrogenation, and coupling reactions.
Journal ArticleDOI
Interface dynamics of Pd–CeO2 single-atom catalysts during CO oxidation
Valery Muravev,Giulia Spezzati,Yaqiong Su,Alexander Parastaev,Fu Kuo Chiang,Alessandro Longo,Carlos Escudero,Nikolay Kosinov,Emiel J. M. Hensen +8 more
TL;DR: In this paper, the Pd/CeO2 single-atom catalysts were compared in low-temperature CO oxidation and display drastically different structural dynamics under the reaction conditions, showing that the oxidized Pd atoms in the impregnated catalyst were prone to reduction and sintering during CO oxidation whereas they remained intact on the surface of Pd-doped CeO2 derived by flame spray pyrolysis.
Journal ArticleDOI
Elucidation of the Active Sites in Single-Atom Pd1/CeO2 Catalysts for Low-Temperature CO Oxidation
Dong Jiang,Gang Wan,Carlos E. García-Vargas,Linze Li,Xavier Isidro Pereira-Hernández,Chongmin Wang,Yong Wang,Yong Wang +7 more
TL;DR: In this article, the active sites for supported precious metals with atomic dispersion are investigated in the context of catalysis due to their potentials in achieving maximum atom efficiency and unique reactivities.
Journal ArticleDOI
Activation of subnanometric Pt on Cu-modified CeO2 via redox-coupled atomic layer deposition for CO oxidation.
Xiao Liu,Shuangfeng Jia,Ming Yang,Ming Yang,Yuanting Tang,Yanwei Wen,Shengqi Chu,Jianbo Wang,Bin Shan,Rong Chen +9 more
TL;DR: The authors achieve the activation of subnanometric Pt on Cu-modified CeO2 for low-temperature CO oxidation with an onset below room temperature.
Journal ArticleDOI
Thermally Stable Single-Atom Heterogeneous Catalysts
TL;DR: Several important preparation approaches for thermally stable single-atom catalysts are described in this paper, and the catalytic performances of these SACs are reviewed, including their activity and stability.
References
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