Article
Chemistry, Applied
Long Zhang, Shushu Huang, Wei Deng, Dengyao Yang, Qianxi Tang, Simin Zhu, Limin Guo
Summary: Three different MFI type zeolites were synthesized as supports, and Co3O4 supported MFI type zeolite catalysts were prepared for dichloromethane catalytic combustion. The catalysts showed better performance than pure Co3O4, with Co3O4/ZSM-5 catalyst exhibiting the best results due to its proper BrOnsted acid sites amount.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Engineering, Chemical
Xirong Zhang, Zhongjun Xu, Mengyun Jiang, Shaobo Chen, Zizhen Han, Ying Liu, Yongchun Liu
Summary: Efficient and stable catalysts with chlorine resistance are developed for the catalytic ozonation of 1,2-dichloroethane. Ce-O-Cu bonds anchored on titanium nanotubes form a strong electronic metal-metal interaction (EMMI) coordination structure. The optimized catalyst 1Ce1Cu/TNTs shows a high conversion rate of 1,2-dichloroethane and good water resistance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Qingji Ying, Yue Liu, Yaoyu Zhang, Zhongbiao Wu
Summary: The in situ sulfation modification improved the performance of Cu/TiO2 catalysts for DCM catalytic combustion, with surface sulfate groups providing abundant Bronsted acidic sites to prevent Cl poisoning. The 1CuSO(4)/TiO2 sample showed the best activity, balancing acidity and redox capacity. CuSO4/TiO2 could partially replace noble-metal Ru/TiO2 catalysts, showing comparable performances for CVOCs catalytic combustion.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Krishna R. Iyer, Aditya Bhan
Summary: Ethylene epoxidation on promoted Ag/α-Al2O3 catalysts shows high ethylene oxide selectivity, with complex interdependencies among ethylene oxidation, chlorine deposition and removal, and EO degradation catalytic cycles. The impact of organochloride promoters on EO synthesis kinetics is illustrated by systematic variations in ethylene and oxygen reaction orders. EO degradation rates, while not influenced by the chlorine promoter, can significantly reduce net EO selectivity.
Article
Chemistry, Physical
Xianbin Wu, Yifan Zhang, Siyuan Chen, Xingyi Zhan, Hua Zhang, Lei Zhang, Liwei Su, Chaoqi Shen, Huan Chen, Hao Wu, Lianbang Wang
Summary: This study introduces a low-carbon CeOx/Ru@RuO2 nanosheet as an efficient cathode catalyst for Li-O2 batteries and investigates its preparation and working mechanisms using various characterization and electrochemical techniques. The nanosheet exhibits optimized Li-O reaction and Li2O2 formation, providing a new material combination and structure design for developing bifunctional catalyst materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Environmental
Feiyi Zhou, Qi Xin, Yujie Fu, Zhesheng Hua, Yi Dong, Mingchu Ran, Hao Song, Shaojun Liu, Ruiyang Qu, Yang Yang, Xiao Zhang, Chenghang Zheng, Xiang Gao
Summary: The development of catalysts with high activity, selectivity, and durability is crucial for the catalytic oxidation of chlorinated volatile organic compounds (CVOCs). RuO2-WOx/Sn0.2Ti0.8O2 catalysts were synthesized and the loading amount of tungsten oxide was found to significantly affect the structure and low-temperature catalytic activity. By loading RuO2, the loss of tungsten species could be effectively avoided. The cordierite catalyst exhibits excellent catalytic activity for the oxidation of different types of CVOCs.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Hangqi Xia, Lilin Liu, Qiang Niu, Feng Wang, Hao Zhang, Wangcheng Zhan, Xingyi Wang, Qiguang Dai
Summary: Nanorods assembled monoclinic CePO4 microspheres were used as the support for highly active Co3O4 catalyst for the catalytic oxidation of Cl-VOCs, inhibiting the formation of polychlorinated byproducts efficiently.
Article
Environmental Sciences
Haibao Liu, Yue Gao, Jie Wang, Jingwen Pan, Baoyu Gao, Qinyan Yue
Summary: The study successfully utilized an alumina-based bimetallic (Mn-Ce) catalyst as an O-3 activator to treat hypersaline organic wastewater, leading to enhanced mineralization of ciprofloxacin under the MCAO process. The synergistic effects of Mn (III)/Mn (IV) and Ce (III)/Ce (IV) redox pairs promoted the generation of reactive oxygen species, resulting in improved degradation efficiency. Additionally, the MCAO process showed promising potential in remediating hypersaline wastewater with various pollutants.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Multidisciplinary
Yaxin Duan, Peixi Liu, Fawei Lin, Yong He, Yanqun Zhu, Zhihua Wang
Summary: Five Mn-loaded catalysts were synthesized on different supports and their catalytic ozonation performance for DCM was evaluated under industrial conditions. The results showed that all catalysts achieved over 90% DCM conversion, with Mn/nanoAl2O3 exhibiting the best performance. Both H2O and SO2 affected the catalyst activity, with the inhibition caused by H2O being reversible.
Article
Engineering, Environmental
Peiyuan Liang, Lina Wang, Qi Wang, Baogang Zhao, Yunhe Li, Yanming Ma, Yi Wei, Tianjun Sun
Summary: Al-Ti oxides supported noble-metal catalysts were prepared through mechanical ball-milling method and incipient wetness impregnation method, in which the etching of Al-Ti mixed oxides by phosphoric acid enhanced the propane oxidation performance. The phosphate-modified Pd/Al2O3-TiO2 catalyst with an Al/P ratio of 3:1 exhibited high catalytic activity, achieving over 90% conversion of C3H8 at 380 degrees C and GHSV of 100000 h-1, with the addition of 5 vol% H2O and 10 vol% CO2. The incorporation of Al2O3 and TiO2 provided a high specific surface area and excellent pore structure, while the phosphate modification enhanced the interaction between Pd species and the support, leading to better dispersion and catalytic stability. The presence of brilliant redox ability and abundant surface oxygen species in phosphate-modified Pd/Al2O3-TiO2 catalysts contributed to the activation of O2 and increased catalytic activity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Jing Li, Lei Qian, Yifei Yan, Wei Wang, Erhao Gao, Jiali Zhu, Zuliang Wu, Shuiliang Yao
Summary: The Ru-V/CeO2 catalyst constructed in this study showed enhanced catalytic performance for dichloromethane (DCM) oxidation, resulting in efficient conversion to CO2 without generating any by-products. The catalyst exhibited good activity and stability in a 48-hour stability test. The presence of V increased the acidity of the catalyst, while the addition of Ru increased the oxygen species, promoting CO2 mineralization.
MOLECULAR CATALYSIS
(2023)
Article
Energy & Fuels
Lu Li, Jianwen Shi, Mingjiao Tian, Yaruo Zhao, Shouning Chai, Chi He
Summary: Partial substitution of La by Sr via diluted HNO3 etching can reconstruct the surface of LaMnO3 and enhance its reducibility and oxidation activity, leading to improved catalytic destruction of chloroaromatic compounds.
Article
Engineering, Chemical
Tao Wei, Bochen Zhao, Zihan Zhou, Hongxiang Di, Tapiwanashe Shumba, Mifen Cui, Zhe Zhou, Xihua Xu, Min Qi, Jihai Tang, Patrick G. Ndungu, Xu Qiao, Zhuxiu Zhang
Summary: A systematic study of a new oxypyrolysis process using Fe2O3@SiO2-Al2O3 catalyst for the removal of organics and ammonia in landfill leachate is reported. The results show that Fe2O3@SiO2-Al2O3 exhibits exceptional catalytic activity with high removal efficiency of COD (99.2%) and NH3-N (95.2%). The oxypyrolysis reaction is also found to be cost-effective, making it highly applicable for leachate treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Ali Cherif, Rachid Nebbali, John William Sheffield, Nimeti Doner, Fatih Sen
Summary: This study presents a numerical analysis of hydrogen production via an autothermal reforming reactor activated with patterned catalytic layers. The novel design aims to improve hydrogen yield, shorten the activated zone length, and reduce oxygen consumption. The new design results in lower costs and a more compact process.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Wenjie Sun, Yijia Huang, Xiaomin Li, Zhen Huang, Hualong Xu, Wei Shen
Summary: Cu-CeOx-MOF catalysts with well-dispersed Cu in different contents were synthesized via the ethylenediaminetetraacetic acid (EDTA) grafting method, with Cu-CeOx-MOF-0.2 showing outstanding catalytic activity and stability, as well as better low-temperature reducibility.
Article
Chemistry, Physical
Ming-Yi Chen, Ngoc Thanh Thuy Tran, Ahmed Abubakar Alao, Wen-Dung Hsu
Summary: This study demonstrates the significance of surface Pt atom arrangement for the efficiency of ORR in PEMFCs and reveals the correlation between Pt-Pt average distance and O2 dissociation barrier. Furthermore, the study discovers a robust correlation between the level of the catalyst's d-band center and O2 adsorption energy. High-entropy alloy substrates provide potential for controlling Pt arrangement and O2 dissociation barrier.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Eduardo C. Atayde Jr, Babasaheb M. Matsagar, Yu-Cheng Wang, Kevin C. -W. Wu
Summary: This study presents the first application of an acidic MOF, Sulfated MOF-808, in catalyzing the HAA reactions of furan oligomers for the production of biofuel precursors. The catalyst showed high yield, selectivity, and recyclability, making it versatile for different starting materials.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Maria do Carmo Rangel, Francieli Martins Mayer, Soraia Jesus de Oliveira, Sergio Gustavo Marchetti, Fabricio Luiz Faita, Doris Ruiz, Giovanni Saboia, Mariana Kieling Dagostini, Jonder Morais, Maria do Carmo Martins Alves
Summary: This study developed a new catalyst by investigating the effect of magnesium on the catalytic properties of hematite in ethylbenzene dehydrogenation. The catalyst showed important differences in activity, selectivity, and stability, making it a promising candidate for commercial applications.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yanjun Li, Qian Wang, Hui Tian, Mingyuan Zhu, Yuanyuan Liu
Summary: A novel strategy using microwave-assisted precipitation was proposed to prepare defective CsH3PMo11VO40 catalyst for the oxidation of methacrolein to methacrylic acid. Microwave treatment accelerates crystallization, increases vanadyl species content, and forms defective Keggin structures, thereby enhancing the oxidation capacity of the catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Rajeshwari Athavale, Sailee Gardi, Fatima Choudhary, Dayanand Patil, Nandkishor Chandan, Paresh More
Summary: In this study, a novel acidic ionic liquid catalyst was prepared and used for the synthesis of bis-indolyl methane derivatives. The catalyst exhibited short reaction times, easy purification, and reusability.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Masatomo Hattori, Takato Hattori, Masakuni Ozawa
Summary: Cu-added gamma-Al2O3 catalysts were prepared with varying Cu loadings and the effects of copper oxidation states on catalytic activity were investigated. The results showed that the addition of copper increased the catalyst activity, but excessive copper loading decreased catalytic activity. XRD and TEM analysis indicated the formation of a solid solution of copper oxide species on the surface of gamma-Al2O3. XAS and TPR data demonstrated variations in copper oxidation states among the catalysts.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liwei Fang, Shiyang Niu, Shengsen Wang, Yiqing Lu, Yuanhui Cheng
Summary: In this study, PtNi alloy on nitrogen-doped carbon and SnO2 dual-support was designed to modulate the metal-support interaction, resulting in improved catalytic activity and stability for oxygen reduction reaction. The SnO2/PtNi/NC catalyst exhibited a strongly coupled interface, enhanced electron transfer, and higher half-wave potential compared to PtNi/NC and commercial Pt/C.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Shohei Harada, Duanxing Li, Kenta Iyoki, Masaru Ogura
Summary: This study investigates the catalytic performance of a composite catalyst composed of ZnZrOX and H-zeolite for the hydrogenation of CO2. The deactivation of the composite catalyst is influenced by ion exchange of Zn2+ and/or coke, with their effects differing based on the zeolite structure. Separating the grains of the composite catalyst can prevent deactivation.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Laura Proano, Christopher W. Jones
Summary: In this study, NiGa alloy particles supported on CeO2, ZrO2, and ZrO2-CeO2 solid solutions were prepared and characterized. The nature of the support was found to have a significant influence on the catalyst's activity and selectivity, with the crystalline structure of ZrO2 having the greatest impact. Pure ZrO2 showed the highest methanol selectivity and CO2 conversion at high Zr:Ce ratios. In equimolar and Ce-rich conditions, basic sites and oxygen vacancies were found to be the key parameters affecting methanol production.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liyan Zhang, Yinze Yang, Leilei Zhou, Fengyu Zhao, Haiyang Cheng
Summary: 1,6-Hexamethylenediamine was successfully synthesized via the reductive amination of 1,6-hexanediol using a Ru/PRL(x)-Al2O3 catalyst. The highly dispersed and anchored Ru species, formed by 1,10-phenanthroline (PRL), played a crucial role in the catalytic reaction. The formation of new acid-base pairs, electron deficient Ru species, and smaller nanoparticles contributed to the improved catalytic performances of the Ru/PRL-Al2O3 catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Anita Horvath, Miklos Nemeth, Andrea Beck, Gyorgy Safran, Valeria La Parola, Leonarda Francesca Liotta, Gregor Zerjav, Matevz Roskaric, Albin Pintar
Summary: This study investigates the catalytic and structural changes caused by the addition of 0.25 wt% indium in a 3% Ni/CeO2-Al2O3 catalyst prepared by impregnation method. The results show that the addition of indium can decrease the activity of the catalyst, but it improves its stability and reduces coking.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Ankush Kularkar, Vaibhav Vilas Khedekar, Sachin D. Chaudhari, Mudavath Ravi, Sadhana S. Rayalu, Penumaka Nagababu
Summary: Efficiently addressing the challenges of photocatalytic CO2 reduction to CH3OH is crucial. This study developed Zn-BTC MOF and its composites with CaIn2S4, achieving highly efficient and robust photocatalytic CO2 reduction to CH3OH under ambient conditions, using H2O2 as the hydrogen source. Among the composites, ZMCIS4 demonstrated excellent performance with a CH3OH evolution of 49100 μmol/g.cat and a quantum efficiency of approximately 78.41%. The enhanced performance was attributed to the production of nascent hydrogen atoms (H center dot) through the photo-splitting of H2O2 on the ZMCIS surface.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Dan Liu, Yudong Li, Chengyu Wang, Haiyue Yang, Rong Wang, Shujun Li, Xiaohui Yang
Summary: In this study, a self-supporting three-dimensional porous Co3O4 nanobelt array decorated on nickel foam (P-Co3O4 -NBA@NF) electrode with numerous active sites was successfully constructed for the oxidation of 5-Hydroxymethylfurfural (HMF) to 2,5-furan dicarboxylic acid (FDCA). The P-Co3O4 -NBA@NF electrode demonstrated high conversion efficiency, selectivity, and Faraday efficiency, as well as remarkable long-term stability. This research provides a promising electrocatalyst for biomass conversion.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yimin Li, Enggah Kurniawan, Fumiya Sato, Takayoshi Hara, Yasuhiro Yamada, Satoshi Sato
Summary: In this study, several silica-alumina catalysts modified with Ag were examined for the dehydration of 1,3-butanediol to 1,3-butadiene. Among them, an amorphous silica-alumina catalyst (SAL-3) modified with Ag showed the highest improvement in catalytic activity and stability when operated in H2 flow. The generation of reversible acid sites was found to be the reason behind the enhanced activity and stability of this Ag/SAL-3 catalyst. The effects of various parameters on the catalytic activity of Ag/SAL-3, such as reaction temperature, contact time, Ag content, and carrier gas, were investigated.
APPLIED CATALYSIS A-GENERAL
(2024)