Nanoscale architecture of ceria-based model catalysts: Pt–Co nanostructures on well-ordered CeO2(111) thin films
Publication date: June 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 6Author(s): Yaroslava Lykhach, Tomáš Skála, Armin Neitzel, Nataliya Tsud, Klára Beranová, Kevin C. Prince, VladimÃr MatolÃn, Jörg LibudaAbstractWe have prepared and characterized atomically well-defined model systems for ceria-supported Pt–Co core–shell catalysts. Pt@Co and Co@Pt core–shell nanostructures were grown on well-ordered CeO2(111) films on Cu(111) by physical vapour deposition of Pt and Co metals in ultrahigh vacuum and investigated by means of synchrotron radiation photoelectron spectroscopy and resonant photoemissio...
Source: Chinese Journal of Catalysis - January 30, 2020 Category: Chemistry Source Type: research
Determining number of sites on ceria stabilizing single atoms via metal nanoparticle redispersion
Publication date: June 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 6Author(s): Aisulu Aitbekova, Cody J. Wrasman, Andrew R. Riscoe, Larissa Y. Kunz, Matteo CargnelloAbstractSingle atom catalysts have recently attracted interest due to their maximization of the utilization of expensive noble metals as well as their unique catalytic properties. Based on its surface atomic properties, CeO2 is one of the most common supports for stabilizing single metal atoms. Many single atom catalysts are limited in their metal contents by the formation of metal nanoparticles once the catalyst support capacity for single atoms...
Source: Chinese Journal of Catalysis - January 30, 2020 Category: Chemistry Source Type: research
Understanding morphology-dependent CuOx-CeO2 interactions from the very beginning
Publication date: June 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 6Author(s): Yuxian Gao, Zhenhua Zhang, Zhaorui Li, Weixin HuangAbstractElucidation of the CuOx-CeO2 interactions is of great interest and importance in understanding complex CuOx-CeO2 interfacial catalysis in various reactions. In the present work, we have investigated structures and catalytic activity in CO oxidation of CuOx species on CeO2 rods, cubes and polyhedra predominantly exposing {110}+{100}, {100} and {111} facets by the incipient wetness impregnation method with the lowest Cu loading of 0.025%. The structural evolution of CuOx spe...
Source: Chinese Journal of Catalysis - January 30, 2020 Category: Chemistry Source Type: research
Insights into facet-dependent reactivity of CuO–CeO2 nanocubes and nanorods as catalysts for CO oxidation reaction
In this study, we deposited 1 wt% Cu on mostly {100}-exposed CeO2 nanocubes (1CuCe NC) and mostly {110}-exposed CeO2 nanorods (1CuCe NR), respectively. Both 1CuCe NC and 1CuCe NR have been used as catalysts for the oxidation of CO and achieved 100% and 50% CO conversion at 130 °C, respectively. The differences in the catalytic activity of 1CuCe NC and 1CuCe NR were analyzed using temperature-programmed reduction of H2 and temperature-programmed desorption of CO techniques. The results confirmed the excellent reducibility of the 1CuCe NC catalyst, which was attributed to the weak interactions between Cu and the CeO2 sup...
Source: Chinese Journal of Catalysis - January 30, 2020 Category: Chemistry Source Type: research
Preface to Special Column for the Youth Innovation Promotion Association, Chinese Academy of Sciences
Publication date: April 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 4Author(s): Qingde Zhang, Hongzhang ZhangGraphical Abstract (Source: Chinese Journal of Catalysis)
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Piezopotential augmented photo- and photoelectro-catalysis with a built-in electric field
Publication date: April 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 4Author(s): Zhirong Liu, Xin Yu, Linlin LiRapid technological development and population growth are responsible for a series of imminent environmental problems and an ineluctable energy crisis. The application of semiconductor nanomaterials in photocatalysis or photoelectrocatalysis (PEC) for either the degradation of contaminants in the environment or the generation of hydrogen as clean fuel is an effective approach to alleviate these problems. However, the efficiency of such processes remains suboptimal for real applications. Reasonable co...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Recent advance on VOCs oxidation over layered double hydroxides derived mixed metal oxides
Publication date: April 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 4Author(s): Shuangde Li, Dongdong Wang, Xiaofeng Wu, Yunfa ChenCatalytic oxidation is regarded as one of the most promising strategies for volatile organic compounds (VOCs) purification. Mixed metal oxides (MMOs), after topological transformation using layered double hydroxides (LDHs) as precursors, are extensively used as catalysts for VOCs oxidation due to their uniformity advantage. This review summarizes the developments in the LDH-derived VOCs heterogeneous catalytic oxidation over the last 10 years. Particularly, it addresses the VOCs ...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Direct conversion of syngas to aromatics: A review of recent studies
Publication date: April 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 4Author(s): Xiaoli Yang, Xiong Su, De Chen, Tao Zhang, Yanqiang HuangThe direct catalytic conversion of syngas to aromatics offers a promising route to manufacture fine chemicals by employing non-petroleum carbon resources, because aromatic constituents are the key platform for producing polymers. However, this remains a great challenge due to the low yield of aromatics and poor catalyst stability, which restrict further development. In recent years, extensive research has been reported on the design of effective catalysts and the optimizati...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Layered transition-metal hydroxides for alkaline hydrogen evolution reaction
Publication date: April 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 4Author(s): Qianfeng Liu, Erdong Wang, Gongquan SunAbstractHydrogen is a promising sustainable energy to replace fossil fuels owning to its high specific energy and environmental friendliness. Alkaline water electrolysis has been considered as one of the most prospective technologies for large scale hydrogen production. To boost the sluggish kinetics of hydrogen evolution reaction (HER) in alkaline media, abundant materials have been designed and fabricated. Herein, we summarize the key achievements in the development of layered transition-m...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Understanding the origin of high oxygen evolution reaction activity in the high Sr-doped perovskite
Publication date: April 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 4Author(s): Sanzhao Song, Jing Zhou, Jian Sun, Shiyu Zhang, Xiao Lin, Zhiwei Hu, Jun Hu, Linjuan Zhang, Jian-Qiang WangEffective electrocatalysis is crucial for enhancing the efficiency of water splitting to obtain clean fuels. Herein, we report a system of interesting and high-performance Sr-doped perovskite electrocatalysts with porous structures, obtained via a facile molten salt method and applied in the oxygen evolution reaction (OER). With increasing the Sr content, the valence states of Co and Fe ions do not clearly increase, accordin...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Unexpectedly selective hydrogenation of phenylacetylene to styrene on titania supported platinum photocatalyst under 385 nm monochromatic light irradiation
Publication date: April 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 4Author(s): Juhong Lian, Yuchao Chai, Yu Qi, Xiangyang Guo, Naijia Guan, Landong Li, Fuxiang ZhangConversion of alkynes to alkenes by photocatalysis has inspired extensive interest, but it is still challenging to obtain both high conversion and selectivity. Here we first demonstrate the photocatalytic conversion of phenylacetylene (PLE) to styrene (STE) with both high conversion and selectivity by using the titania (TiO2) supported platinum (Pt) as photocatalyst under 385 nm monochromatic light irradiation. It is demonstrated that the conver...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
A facile solvent-free synthesis strategy for Co-imbedded zeolite-based Fischer-Tropsch catalysts for direct gasoline production
Publication date: April 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 4Author(s): Mudassar Javed, Shilin Cheng, Guihua Zhang, Cederick Cyril Amoo, Jingyan Wang, Peng Lu, Chengxue Lu, Chuang Xing, Jian Sun, Noritatsu TsubakiA series of Co-imbedded zeolite-based catalysts were synthesized following a facile solvent-free grinding route. The catalytic performance for direct syngas conversion to gasoline range hydrocarbons was compared with their counterpart Co-impregnated zeolite-based catalysts. Successful transformation of solid raw materials to targeted zeolite was confirmed by XRD, SEM, STEM, and N2 physisorpt...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Versatile application of wet-oxidation for ambient CO abatement over Fe(OH)x supported subnanometer platinum group metal catalysts
Publication date: April 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 4Author(s): Hongling Guan, Yang Chen, Chongyan Ruan, Jian Lin, Yang Su, Xiaodong Wang, Lingbo QuThe efficient and stable abatement of CO pollutant under ambient conditions is of great significance; however, it remains a formidable challenge. Herein, we report the versatile application of wet oxidation over Fe(OH)x supported subnanometer Pt group metal (PGM) catalysts for the complete removal of CO under ambient temperature and humidity conditions. Typically, the 1.8 wt% Rh/Fe(OH)x catalyst exhibited better durability during a ∼1400 min run...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Melting-assisted solvent-free synthesis of SAPO-11 for improving the hydroisomerization performance of n-dodecane
Publication date: April 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 4Author(s): Gan Yu, Xinqing Chen, Wenjie Xue, Lixia Ge, Ting Wang, Minghuang Qiu, Wei Wei, Peng Gao, Yuhan SunAbstractA novel melting-assisted solvent-free route using solid oxalic acid was proposed for the post-treatment of SAPO-11 zeolite, followed by loading with 0.5 wt% Pt by the incipient wetness impregnation method. Subsequently, the performance of the obtained bifunctional catalysts toward the hydroisomerization of n-dodecane was examined. The prepared samples were characterized by XRD, SEM, BET, XRF, Py-IR, and solid-state NMR. From ...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Effective synthesis of 5-amino-1-pentanol by reductive amination of biomass-derived 2-hydroxytetrahydropyran over supported Ni catalysts
Publication date: April 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 4Author(s): Xuemei Li, Junying Tian, Hailong Liu, Congkui Tang, Chungu Xia, Jing Chen, Zhiwei HuangAbstractA highly efficient and green process was developed for the synthesis of useful 5-amino-1-pentanol (5-AP) from biomass-derived dihydropyran by coupling the in situ generation of 5-hydroxypentanal (5-HP, via the ring-opening tautomerization of 2-hydroxytetrahydropyran (2-HTHP)) and its reductive amination over supported Ni catalysts. The catalytic performances of the supported Ni catalysts on different oxides including SiO2, TiO2, ZrO2, Î...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
