Article
Chemistry, Multidisciplinary
Jing Xu, Ying Wang, Ke Wang, Meng Zhao, Rui Zhang, Wenjie Cui, Li Liu, Megalamane S. Bootharaju, Jeong Hyun Kim, Taeghwan Hyeon, Hongjie Zhang, Yu Wang, Shuyan Song, Xiao Wang
Summary: Highly active and durable rhodium (Rh) single-atom catalysts were synthesized through a wrap-bake-peel process. The pre-coated SiO2 layer plays a crucial role in protecting the CeO2 support and producing highly loaded Rh single atoms on the CeO2 support with high-index {210} facets. The unique electronic structure of CeO2 {210} facets leads to more oxygen vacancies and improved catalytic performance in CO oxidation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Piotr Wozniak, Piotr Kraszkiewicz, Malgorzata A. Malecka
Summary: This paper presents information on the interactions in the Au/CeO2 system from a novel perspective, focusing on the Au-CeO2 interaction. The study finds that the shape and distribution of nanoparticles are not solely dependent on the ionic radius of the dopant, but also on the deformation type in the CeO2 network. Additionally, decorating macroparticles significantly improves the selectivity of the propane oxidation process.
Article
Chemistry, Multidisciplinary
Srisin Eaimsumang, Nuwong Chollacoop, Apanee Luengnaruemitchai, Stuart H. Taylor
Summary: This study demonstrates a simple hydrothermal synthesis approach for preparing CeO2-supported gold (Au) catalysts, which exhibit enhanced catalytic performance in oxidation reactions when the reducibility of CeO2 support increases and the number of adsorbed peroxide species on the support increases due to Au addition.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Physical
Lyubov Isupova, Evgeny Gerasimov, Igor Prosvirin, Vladimir Rogov
Summary: LaFe0.4Ni0.6O3/CeO2 (1:1) two-phase composite materials were prepared by mechanochemical and Pechini routes. The catalytic properties of the composites in methane and CO oxidation reactions strongly depend on their preparation conditions. In low-temperature catalytic CO oxidation, the composites demonstrate higher activity compared with LaFe0.4Ni0.6O3 perovskite, with the highest activity observed for the composite prepared by mechanical treatment of perovskite and fluorite precursors. In high-temperature catalytic methane oxidation, the activity correlates with the reducibility of the samples, with the highest activity observed for the composite prepared by the one-pot Pechini route with higher reducibility up to 600 degrees C.
Article
Chemistry, Physical
Violeta Melinte, Andreea-Laura Chibac-Scutaru, Madalina Elena Culica, Sergiu Coseri
Summary: Multiple cellulose-derived platforms were designed to immobilize CeO2 nanoparticles, showing efficient photocatalytic activity under UV light. Synthesized CeO2 nanoparticles at different pH values exhibited varying shapes and band gap values, with better results obtained at basic pH. The nanocomposites tested as photocatalysts in the photodegradation of pollutants showed promising reusability and efficiency under visible light.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Shuxin You, Shilong Xing, Chuanhai Jiang
Summary: This study investigates the influence of various-sized CeO2 particles on the microstructure and properties of electrodeposited Ni-CeO2 composite coatings. Compared to microparticles, nanoparticles show better performance in optimizing the surface topography, achieving a homogeneous coating surface, and suppressing texture. Nano coatings possess a more random surface grain orientation, a higher level of grain refinement, and numerous low angle grain boundaries, contributing to the enhancement of the coatings' performance.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Physical
Jian Shi, Jialin Li, Hui Ma, Donghuai Tu, Qian Zhang, Wei Mao, Jianming Yang, Jian Lu
Summary: RuO2 supported on Ti-Sn oxide shows excellent catalytic activity, with Ti0.97Sn0.03O2 exhibiting the best performance. Moderate Sn addition facilitates the dispersion and stabilization of RuO2, while a large number of oxygen vacancies contribute to enhanced catalytic performance.
APPLIED SURFACE SCIENCE
(2021)
Article
Energy & Fuels
Zijian Zhou, Lei Liu, Xiaowei Liu, Yue Zhou, Changqing Wang, Jingying Xu, Guozhang Chang, Minghou Xu
Summary: MnOx-based oxides are efficient catalysts for elemental mercury oxidation in flue gas, and combining with CeO2 or CeO2-ZrO2 enhances their catalytic activity. The new MnOx-CeO2-ZrO2 solid solution catalyst showed better Hg-0 oxidation performance compared to the MnOx/CeO2-ZrO2 supported catalyst. Mn4+ and surface active oxygen were identified as the active species in Hg-0 oxidation reactions, and SO2 significantly inhibited the activity of MnOx/CeO2-ZrO2 but had less impact on MnOx-CeO2-ZrO2 solid solution.
Article
Chemistry, Physical
Kyung-Min Lee, Melanie Brito, Jamie DeCoster, Kelvin Linskens, Kareem Mehdi, Won-Il Lee, Emily Kim, Hajoon Kim, Gihan Kwon, Chang-Yong Nam, Taejin Kim
Summary: This study investigated the impact of pretreatment conditions on the physical properties and catalytic activity of CeO2 catalysts. The results showed that higher pretreatment temperatures resulted in decreased surface area, decreased oxygen vacancy/defect sites, and increased crystallite size.
MOLECULAR CATALYSIS
(2022)
Article
Chemistry, Physical
Changlong Zheng, Danjun Mao, Zhaoyi Xu, Shourong Zheng
Summary: This study investigates the catalytic performance and thermal durability of Ru and Ag supported on CeO2 catalysts for soot oxidation. The results show that Ru/CeO2 catalyst exhibits high catalytic activity and strong thermal stability, which can be attributed to the strong interactions between Ru and CeO2.
JOURNAL OF CATALYSIS
(2022)
Article
Engineering, Environmental
Ying Du, Fengyu Gao, Yuansong Zhou, Honghong Yi, Xiaolong Tang, Zhiyong Qi
Summary: Carbon monoxide and nitric oxide are widely present in industrial flue gas and pose risks to human health and the environment. The use of CuO-CeO2 composite oxide catalysts shows promising results in the removal of CO and NO, which is important for reducing air pollution. Further research is needed to optimize the performance of these catalysts for industrial applications.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Yanbo Deng, Pengfei Tian, Shijie Liu, Huaqiang He, Yuan Wang, Like Ouyang, Shaojun Yuan
Summary: In this study, single-atom Pd catalyst supported on Pr-doped CeO2 nanorods was prepared, and the performance and nature of Pr-coordinated atomic Pd site in CO catalytic oxidation were systematically investigated. The results showed that Pr-doping can enhance the catalytic activity of CO oxidation by reducing the formation energy of oxygen vacancies and increasing the number of oxygen vacancies around the Pd sites.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Yong Liao, Zhisong Liu, Zihao Li, Guanqun Gao, Leipeng Ji, Haomiao Xu, Wenjun Huang, Zan Qu, Naiqiang Yan
Summary: Slip NH3 is a priority pollutant to be removed after denitrification using NH3-SCR or NH3-SNCR. The simultaneous catalytic removal of NH3 and CO has become a new topic in the treatment of flue gases. In this study, it was found that CO can significantly promote NH3-SCO over the CuOx-CeO2 catalyst by facilitating the generation of active oxygen atoms (Oi) and enhancing the NH3 conversion rates.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Richuan Rao, Hanwen Liang, Chunming Hu, Huaze Dong, Xiongzi Dong, Yongqiang Tang, Song Fang, Qiang Ling
Summary: Ag-CeO2 nanoassemblies were prepared via a simple method, with a structure comprising Ag nanoparticles and CeO2 nanoparticles. The ease of Ag-CeO2 interface oxygen activation is strongly influenced by the pyrolysis temperature. Nanoassemblies prepared at higher temperatures exhibit higher catalytic activity due to more interfacial lattice oxygen provided at lower temperatures.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Manu Sharma, K. Harikrishnan, Umesh Kumar Gaur, Ashok K. Ganguli
Summary: Transamidation reactions catalyzed by boronic acid derivatives and metal catalysts are commonly known and have been hindered by elevated temperatures and long reaction times. The SiO2-CeO2 hybrid nanocomposite, prepared by solvothermal route, exhibits high catalytic activity at low temperatures and solvent-free conditions. It shows over 99% selectivity for the conversion of N-heptyl amine with acetamide to N-heptyl acetamide at 120 degrees C for 3 hours, with above 90% catalytic activity. The catalyst maintains 80% catalytic activity even after 4 repeated cycles.
Article
Chemistry, Multidisciplinary
Xiaolong Liang, Fang Dong, Zhicheng Tang, Qingchun Wang
Summary: This study prepared a graphite carbon nitride and carbon nanosheet composite support through in situ synthesis and investigated the effect of Pt-based catalysts on methanol electrocatalytic oxidation. The results showed that the in situ synthesized composite support exhibited higher catalytic performance and stability compared to mechanically synthesized support. The characterization results revealed that the in situ synthesized support had stronger interaction, larger specific surface area, and higher nitrogen content, resulting in better dispersion of Pt nanoparticles and superior electrocatalytic performance for the MOR reaction.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
Jianfei Yao, Fang Dong, Xin Xu, Meng Wen, Zhongying Ji, Hua Feng, Xiaolong Wang, Zhicheng Tang
Summary: A novel 3D printed layered ordered mesoporous template is developed to encapsulate active species in a confined way, leading to the formation of a monolithic catalyst. The resulting catalyst exhibits excellent catalytic performance and stability in the combustion of toluene, highlighting its potential in industrial VOCs elimination.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Siyi Ma, Weiliang Han, Fang Dong, Zhicheng Tang
Summary: Pt@CeO2 catalysts with different structures were synthesized and their catalytic performance for toluene combustion was studied. The Pt@CeO2-R catalyst with a nanorod structure exhibited the best activity, which can be attributed to the confinement effect of Pt nanoparticles in Ce-MOFs, as well as the chemical state of Pt species, redox ability, and the amount of active oxygen species.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Liqiong Liu, Weiliang Han, Fang Dong, Hua Feng, Zhicheng Tang
Summary: Two mesoporous catalysts were constructed for the catalytic combustion of propane, and it was found that the framework-confined Pt/Ti0.1AlOy-EISA catalyst showed better catalytic activity and thermal stability compared to the pore-confined Pt/Ti0.1AlOy-VI catalyst. The framework-confined catalyst had higher Pt dispersion, while the pore-confined catalyst exhibited better water and sulfur resistance due to the protection provided by the pores. In situ DRIFTS experiments suggested the Langmuir Hinshelwood (L-H) mechanism as the possible reaction mechanism.
NEW JOURNAL OF CHEMISTRY
(2023)
Review
Chemistry, Physical
Siyi Ma, Weigao Han, Weiliang Han, Fang Dong, Zhicheng Tang
Summary: This paper reviewed in detail the synthesis of SACs from multiple MOF derivatives, the formation mechanism of various single-atom sites, and their application in the catalysis field. It was concluded that different kinds of MOF substrates were used to construct coordination environments with different anchoring conditions, and the related catalytic mechanisms through the introduction of metal active centers in different coordination environments were discussed in detail. Additionally, the use of MOF-derived SACs in the fields of electrocatalysis, photocatalysis, and thermocatalysis was introduced, along with important characterization methods. The future potential and challenges in the field were also outlined.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Engineering, Chemical
Fei Zhao, Guodong Zhang, Xiaosheng Huang, Zhicheng Tang, Fei Zha
Summary: By introducing polytetrafluoroethylene (PTFE) powder on the catalyst surface, the water resistance of Mn-based catalysts can be improved, resulting in better catalytic activity and NH3-SCR performance.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Nanoscience & Nanotechnology
Dan Yang, Fang Dong, Weigao Han, Jiyi Zhang, Zhicheng Tang
Summary: The sulfur resistance of Pt/SiO2 catalyst was significantly improved by coating a metal oxide shell. Among them, the Pt/SiO2@MnOx catalyst coated with a MnOx shell showed the best performance. This is because the MnOx shell not only protected the Pt active site but also had a good electron transfer effect on the core Pt.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Jie Wang, Fang Dong, Zhicheng Tang, Lei Niu, Xia Zhao
Summary: This study examines the effects of the redox properties and acid sites on the catalyst surface on the activity, selectivity, and chlorine-resistance stability of catalysts for the catalytic combustion of chlorinated volatile organic compounds (CVOCs). SnMnOx catalysts were prepared using different Sn-doping methods to modulate the electron valence state of Mn. The R-SnMnOx catalyst exhibited superior activity and chlorine resistance compared to the R-MnOx, C-SnMnOx, and I-SnMnOx catalysts. The doping of Sn in the MnOx catalyst greatly affected the surface acidity, active oxygen species, the chemical state of Mnn+ species, and redox ability. The R-SnMnOx catalysts showed excellent water resistance, which can be attributed to the strong interaction between Snn+ and Mnn+ that promotes the dispersion of active Mn species, formation of acid sites, availability of lattice oxygen species, and enhanced redox ability, resulting in faster conversion of benzene and intermediates.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Energy & Fuels
Yuhang Wang, Guodong Zhang, Xiaosheng Huang, Zhicheng Tang, Hua Feng
Summary: CeSmFTi catalyst prepared by one-pot hydrothermal method showed enhanced catalytic performance and SO2 resistance in NH3-SCR reaction. Ce5Sm1FTi94 catalyst exhibited better catalytic activity, with NO conversion exceeding 90% at 320 degrees C. The presence of CeF3 regulated Ce3+ proportion, accelerated SCR reaction, and inhibited SO2 oxidation. Doping Sm into the catalyst improved acidity, redox performance, and inhibited SO2-cerium species combination, resulting in minimized sulfate species formation and better SO2 tolerance. The NH3-SCR reaction on Ce5Sm1FTi94 catalyst involved both L-H and E-R mechanisms, with L-H mechanism being dominant.
Article
Energy & Fuels
Qingjun Ren, Guodong Zhang, Xiaosheng Huang, Zhicheng Tang, Jiyi Zhang
Summary: Currently, Ca poisoning is the main reason for the deactivation of SCR catalysts in cement kilns. In this study, a series of Ca poisoned V2O5-WO3/TiO2 catalysts were simulated and investigated. The presence of CaO not only blocked partial active sites by reacting with SO2 to form CaSO4, but also destroyed the dispersion of WO3 and formed CaWO4. These changes reduced the NO conversion rate and inhibited the SCR process.
Article
Chemistry, Multidisciplinary
Tian Zhao, Xiaosheng Huang, Rongji Cui, Guodong Zhang, Zhicheng Tang
Summary: MnOx-based catalysts are promising alternatives for low-temperature NH3-SCR to remove NOx, but their poor tolerance to SO2 and H2O, as well as unfavorable N-2 selectivity, hinder their practical application. To overcome these limitations, the researchers confined manganese oxide active species in Ho-modified titanium nanotubes, resulting in enhanced SO2 resistance and N-2 selectivity. The Ho-TNTs@Mn catalyst exhibited excellent catalytic activity, strong tolerance to SO2 and H2O, and high N-2 selectivity. The study proposes that Ho-TNTs@Mn with a well-designed nanotube structure has great potential for NH3-SCR applications.
Article
Chemistry, Multidisciplinary
Rongji Cui, Xiaosheng Huang, Guodong Zhang, Zhicheng Tang
Summary: A novel 3D-structured Mn/YTiOx nanotube catalyst was designed and its catalytic performance for NH3-SCR reaction at low temperature was investigated. The results showed that an appropriate amount of Y doping improved the dispersion of MnOx and increased the concentration of active sites, thus enhancing the activity, N-2 selectivity, and resistance to H2O/SO2 of the catalyst. The Mn/3%YTiOx catalyst exhibited the highest activity with over 90% NO conversion and N-2 selectivity in a wide temperature range from 120 to 320 ℃.
Article
Chemistry, Multidisciplinary
Yibo Mu, Xiaosheng Huang, Zhicheng Tang, Qingchun Wang
Summary: In this study, Ce-based catalysts with ordered mesoporous structures were prepared, and it was found that Ce10W2/TS-3 catalyst exhibited large specific surface area, excellent redox ability, surface acidity, and resistance to water and sulfur. The findings provide new insights into the design and synthesis of Ce-based catalysts with ordered mesoporous confinement for NH3-SCR applications.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Ziguo Cai, Guodong Zhang, Zhicheng Tang, Jiyi Zhang
Summary: In this study, yolk-shell structured MnFe@CeOx@TiOx nanocages were prepared to broaden the reaction temperature range and improve the water resistance of manganese-based catalysts. The double-shell structure increased the proportion of active species and enhanced the interaction between metal oxides, achieving a balance between the catalyst's redox capacity and surface acidity.
Article
Chemistry, Multidisciplinary
Shixing Wu, Haijun Zhao, Zhicheng Tang, Jiyi Zhang
Summary: In this study, multi-dimensional CoFeOx catalysts were constructed to enhance the catalytic oxidation elimination of o-dichlorobenzene (o-DCB). The results showed that the 2D/1D CoFeOx/CoOx catalyst exhibited outstanding catalytic activity and thermal stability.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Abu Talha Aqueel Ahmed, Sankar Sekar, Shubhangi S. Khadtare, Nurul Taufiqu Rochman, Bathula Chinna, Abu Saad Ansari
Summary: In this study, MnCo2S4 nanosheet catalyst was successfully synthesized and found to exhibit superior performance in hydrogen evolution. Compared to MnCo2S4, MnCo2S4 showed low overpotentials, moderate Tafel slope, and excellent sustainability. The outstanding performance can be attributed to the increased number of electrochemically active sites and enhanced electronic conductivity on the catalyst surface.
Article
Chemistry, Multidisciplinary
Victor V. Maltsev, Elena A. Volkova, Elizaveta V. Koporulina, Diana D. Mitina, Vladimir L. Kosorukov, Anna I. Jiliaeva, Daniil A. Naprasnikov, Konstantin N. Gorbachenya, Viktor E. Kisel
Summary: The phase relationships, crystal properties and luminescence kinetics of two complex systems were studied, including unit cell parameters, segregation coefficients of impurities, and lifetimes of energy levels.
Article
Chemistry, Multidisciplinary
Xiaoman Zhang, Wangwang Xu, W. J. Meng, Andrew C. Meng
Summary: This study successfully grew high-quality single crystal AlScN nanowires through ultra-high vacuum reactive sputtering technique and characterized their structure and properties. The nanowires exhibit significantly reduced mosaic spread and predominantly single ferroelectric domains, as well as a high piezoelectric constant.
Article
Chemistry, Multidisciplinary
Tom E. de Vries, Elias Vlieg, Rene de Gelder
Summary: Networks are important for describing relationships between people, roads between cities, reactions between chemicals, and other interactions. Bipartiteness, dividing the network into two groups, can facilitate the study of the network's structure. We have developed an algorithm that can find a near-optimal bipartisation within a reasonable time frame and used it to uncover the hidden structure of the CSD cocrystal network.
Article
Chemistry, Multidisciplinary
Chuchu Han, Jing Yang, Xin Zhang, Aisen Li, Jiang Peng
Summary: An elastic crystal based on a photo-reactive acylhydrazone derivative is reported, which exhibits reversible bending behavior under UV irradiation and heating. The crystal undergoes reversible E<->Z isomerization under light and heating conditions. The crystal demonstrates excellent elastic properties and the bending can be controlled to control the output direction of red light.
Article
Chemistry, Multidisciplinary
Lingfeng Zhang, Yu Wang, Yefeng Wang, Shuai Liu, Na Zhang, Mingmin Yang, Haixia Ma, Zhaoqi Guo
Summary: This study designs and synthesizes a series of high-energy salts compounds without heavy metal ions and azide groups. The molecular structures and stability of the compounds are confirmed through single-crystal X-ray diffraction and intermolecular interaction analysis. Furthermore, the thermal stability, energetic properties, and electrical initiation properties of the compounds are investigated, suggesting their potential as primary explosives.
