Article
Chemistry, Multidisciplinary
Yang Jiang, Qian Li, Xi Li, Xinyi Wang, Sen Dong, Jianhua Li, Li Hou, Tifeng Jiao, Yatao Wang, Faming Gao
Summary: This study successfully prepared three-dimensional network Pd-Ni bimetallic catalysts, which exhibited high conversion rate and selectivity for the hydrogenation of nitrobenzene at low temperature and normal pressure. The catalysts showed significant catalytic efficiency and recyclability even after 10 cycles, providing important theoretical basis and technical support for the preparation of low-cost, highly efficient catalysts.
Article
Chemistry, Physical
Hui Dai, Xin Xiao, Lihong Huang, Changjian Zhou, Jie Deng
Summary: The study demonstrates that Palygorskite modified with NH3 promotes the dispersion of Pd nanoparticles, inhibits the formation of beta-PdHX, and enhances the ethylene selectivity.
APPLIED CLAY SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Yun Peng Lv, Fang Yu, Zhi Peng Wang, Hai Wei Liu, Li Yan Wang, Jian Song, Yu Li, Gui Qiu Huang, Jian Cui
Summary: Pt nanoparticles confined inside ordered mesoporous carbon (OMC) were used for catalytic hydrogenation of o-chloronitrobenzene. The improved catalytic performance was attributed to enhanced mass diffusion and the formation of small-sized Pt nanoparticles stabilized inside the ordered mesopores. The Pt/CMC catalyst showed outstanding stability and could be reused multiple times without significant loss of activity and selectivity. This study provides theoretical guidance for the rational design of supported Pt catalysts for the chemoselective hydrogenation of halogenated nitrobenzenes.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Energy & Fuels
Ivan Pedroarena, Lucia Grande, Jonathan J. Torrez-Herera, Sophia A. Korili, Antonio Gil
Summary: This research investigates the interactions between alumina-supported nickel catalysts and other metals, and their impact on the catalyst's performance. The reduction capacity of oxide phases has been analyzed, revealing that Pd facilitates the formation of easily reducible NiO species. Furthermore, the impregnation order of Mo and Pd does not significantly affect the catalysts' properties.
Article
Engineering, Chemical
Peng Yan, Kai Zhang, Yaqi Peng
Summary: This study aims to improve the performance of catalytic methane decomposition in a moving fixed bed by investigating the reduction characteristics of the catalyst. The Fe2O3-Al2O3 catalyst shows good catalytic activity and stability in methane reduction and heating conditions.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Environmental Sciences
Minghui Li, Hang Liu, Chang Liu, Yan Ding, Caixia Fang, Rui Wan, Hongjie Zhu, Yaning Yang
Summary: In this study, Pd sub-nanolayer on Au core catalysts supported on Al2O3 (sub-Pd-Au/Al2O3) were designed for highly effective catalytic hydrogenation reduction of oxyanions. The optimized catalyst exhibited excellent catalytic activity for the reduction of Cr(VI), Br(V) and Se(IV) oxyanions.
ENVIRONMENTAL POLLUTION
(2023)
Article
Green & Sustainable Science & Technology
Yifeng He, Ronghou Liu, Dominic Yellezuome, Wanxi Peng, Meisam Tabatabaei
Summary: This study focuses on the upgrading of biomass-derived bio-oil through catalytic hydrogenation. A new catalyst, Rh/ZrO2, was developed with high deoxygenation ability. Catalytic hydrogenation can remove oxygen from bio-oil and reduce its oxygen content, thereby enhancing its potential as a biofuel.
Article
Chemistry, Multidisciplinary
Ruijie Gao, Jisheng Xu, Jian Wang, Jongwoo Lim, Chong Peng, Lun Pan, Xiangwen Zhang, Huaming Yang, Ji-Jun Zou
Summary: The study successfully constructed a highly active and stable single palladium-iron catalyst, achieving high activity and selectivity for alkyne hydrogenation and exhibiting excellent performance for purifying acetylene from ethylene streams.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Jiajuan Li, Zizhu Wang, Yirui Ma, Caiyun Xu, Shenghu Zhou
Summary: In this study, mesoporous silica SBA-16-supported NiCo bimetallic nanocatalysts were synthesized and confirmed through various characterization techniques. The synthesized NiCo/SBA-16 showed enhanced catalytic performance for the hydrogenation of nitroaromatics. The improved catalytic performance was attributed to the formation of NiCo bimetallic nanostructures, where the synergistic effect between Ni and Co enhanced their catalytic activities.
Article
Chemistry, Physical
Shuai Chen, Tianxing Yang, Hao Lu, Yanan Liu, Yufei He, Qiang Li, Junxian Gao, Junting Feng, Hong Yan, Jeffrey T. Miller, Dianqing Li
Summary: In this study, atomically dispersed La was introduced into Al2O3 through a simple bottom-up synthesis, followed by the addition of Pd to prepare microspherical Pd/La-Al2O3 catalyst with potential for hydrogenation applications. The Pd/La-Al2O3 catalyst exhibited enhanced activity for various hydrogenation reactions and functional groups, and the incorporation of isolated O(-La) sites adjacent to the Pd nanoparticles provided a feasible strategy for designing high-efficiency hydrogenation catalysts and had important implications for the development of the commercial hydrogenation process.
Article
Chemistry, Multidisciplinary
Wenyan Li, Xinying Lin, Jing Long, Bo Zheng, Zhaorui Pan, Leiming Lang, Guangxiang Liu
Summary: The mesoporous core-shell structure Ag@SiO2 nanospheres are constructed to prevent aggregation of Ag nanoparticles during hydrogenation, leading to superior catalytic performance in terms of 100% conversion and selectivity in the hydrogenation of nitro compounds, with good recycling performance for multiple uses.
Article
Polymer Science
Wenxing Jiang, Yingxue Wu, Xianhong Zhang, Dong Chen, Yuhong Ma, Wantai Yang
Summary: Monodisperse and nanoporous poly(bismaleimide-co-divinylbenzene) microspheres (PBMs) were fabricated via self-stabilized precipitation polymerization without any dispersants or templates. The particle size, surface area, and pore structure of PBMs could be controlled by adjusting the monomer feed ratio and solvent composition. The resulting PBMs exhibited high specific surface area and pore volume. They were also used as catalysts loaded with Pd nanoparticles and showed excellent catalytic activity and recyclability for the reduction reaction of 4-nitrophenol. This facile strategy opens up new possibilities for the synthesis of porous microspheres with well-controlled morphology and tunable pore structure.
Article
Environmental Sciences
Wenjing Xie, Chencheng Song, Wei Ren, Jingyi Zhang, Lei Chen, Jie Sun
Summary: In this study, Pd/CeO2 was used as a bifunctional catalyst in the EF system to effectively remove chlorophenols, achieving over 95% removal within 10 minutes. The degradation rate constant was significantly increased in the Pd/CeO2-EF system compared to electrolysis with Pd/CeO2 and EF alone. The generation of -OH and dehydrochlorination by Pd [H] were identified as key contributors to the removal of chlorophenols.
Article
Energy & Fuels
Jiashi Wang, Ce Du, Qinhong Wei, Wenzhong Shen
Summary: Two-dimensional metallic Pd nanosheets were synthesized via an ion-exchange method and exhibited higher catalytic activity compared to Pd nanoparticles in catalytic reactions.
Article
Engineering, Chemical
Lu Lv, Min Zhao, Yanan Liu, Yufei He, Dianqing Li
Summary: In this study, dodecyl phosphoric acid (PA) was used to modify the surface of alumina (Al2O3) to obtain hydrophobic material (Al2O3-PA) with excellent hydrophobicity, hydrothermal stability, and maintained pore structure. The Pd/Al2O3-PA catalyst exhibited superior catalytic performance in the hydrogenation of phenol and anthraquinone, with enhanced stability attributed to the inhibition of Pd nanoparticle aggregation and product adhesion through PA modification.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2023)
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)