Article
Engineering, Environmental
Xiaohong Wang, Juguo Dai, Hongmei Xie, Chunying Yang, Liu He, Tong Wu, Xiaohui Liu, Yiting Xu, Conghui Yuan, Lizong Dai
Summary: In this study, a one-step and space-confinement pyrolysis strategy is used to construct ultrathin MoP-MoS2 heterostructure on N, P and S co-doped hollow carbon spheres (MoP-MoS2/HCSs), which exhibit remarkable HER performance and outstanding stability.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Junlu Bi, Xuejun Zhai, Guishan Liu, Jing-Qi Chi, Xuanyi Wang, Shaojin Chen, Zhenyu Xiao, Lei Wang
Summary: In this study, low loading of P modified ultrafine Rh nanoparticles encapsulated in N, P dual-doped carbon layers (Rh-P@NPC) were successfully prepared using a facile synthesis strategy. The resulting Rh-P@NPC catalyst demonstrates remarkable electrocatalytic activity for hydrogen evolution reaction (HER) in the whole pH range, comparable to commercial Pt/C catalysts, and exhibits high durability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Yunhua Zheng, Jian Rong, Jinchao Xu, Yao Zhu, Tao Zhang, Dongya Yang, Fengxian Qiu
Summary: By synthesizing a Codoped MoS2/NiS2 nanosheet array through a three-step hydrothermal process, this study demonstrates excellent electrocatalytic activity and long-term stability in hydrogen production.
APPLIED SURFACE SCIENCE
(2021)
Article
Energy & Fuels
Jingyang Tian, Nan Nan Xia, Chong Lin
Summary: Developing cheap and abundant materials as high efficient HER catalysts to replace noble metal catalysts is urgent. The N, P dual-doped MoS2 on hollow carbon spheres (P-MoS2@NCs) shows excellent electrocatalytic performance for HER with low overpotential and Tafel slope. It provides a new method to develop advanced MoS2-based catalyst for the HER.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Jiannan Cai, Xiaofeng Zhang, Yuqi Pan, Yanhong Kong, Shen Lin
Summary: In this study, a rational design was proposed to introduce cobalt phosphide particles into molybdenum sulfide nanosheets through ultrasonic and calcination methods, resulting in the formation of MoS2 parallel to CoP heterostructure, combined with N, P-doped carbon to form MoS2 parallel to CoP/NPC composite. The as-prepared material showed highly efficient catalytic performance for oxygen evolution, hydrogen evolution, and oxygen reduction reactions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Electrochemistry
Xinxin Luan, Kaili Zhu, Xiao Zhang, Ping Yang
Summary: A core-shell structure of MoS2 nanosheets decorated double-layered hollow carbon spheres (DLHCs@MoS2) was synthesized to enhance electrochemical activity. This dual-functional nanocomposite material exhibited excellent performance in hydrogen evolution reaction and supercapacitors, making it a promising low-cost and high-efficiency material.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Kuo Cao, Shiwei Sun, Aiying Song, Jinxiao Ba, Haowen Lin, Xianghai Yu, Chengqun Xu, Bingjun Jin, Jan Huang, Donghua Fan
Summary: A new strategy was developed to prepare MoS2 @CoS2/G electrocatalysts with high-percentage metallic 1T-MoS2 phase, which exhibited excellent catalytic activity and stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Shuhuan Han, Xiuhui Li, Xiaofei Zeng, Dapeng Cao, Jian-Feng Chen
Summary: This study reports a vertically aligned core-shell structure material with hollow polypyrrole nanowire as a core and Ru-doped MoS2 nanosheets as a shell, which serves as a highly efficient and ultra-stable catalyst for electrocatalytic hydrogen evolution reaction in alkaline solutions. Results show that the catalyst exhibits low overpotential and stable catalytic activity, and the core-shell structure enhances the activity and stability of the catalyst.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Zhaohui Yang, Huihui Zhao, Xiaoping Dai, Fei Nie, Ziteng Ren, Xueli Yin, Yonghao Gan, Baoqiang Wu, Yihua Cao, Xin Zhang
Summary: The combination of anionic doping and multicomponent synergism is an effective approach to improve the performance of electrocatalysts in the hydrogen evolution reaction. The synthesized P-doped CoS2-MoS2 hollow spheres exhibit outstanding HER performance due to their unique hollow structure with countless sheets and P-doping optimization.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Yuxiao Gao, Ying Zhao, Hongru Liu, Mingyu Shao, Zhi Chen, Tianyi Ma, Zexing Wu, Lei Wang
Summary: In this study, a Ru-Re3P4/NPC catalyst with porous nanostructure was prepared using a low-toxic material, which successfully regulated the electrocatalytic activity and improved the efficiency of the hydrogen evolution reaction.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Energy & Fuels
Qinghua Ji, Xiaojie Yu, Li Chen, Clinton Emeka Okonkwo, Cunshan Zhou
Summary: This study proposes a cobalt doping strategy to enhance the catalytic activity of molybdenum disulfide (MoS2) catalysts and combines it with sugarcane bagasse derived carbon to produce a low-cost and highly active non-noble metal electrocatalyst for the hydrogen evolution reaction (HER).
Article
Energy & Fuels
Hai Lan, Yuting Yang, Yi Wu, Miao Liu, Fei Li, Feng Wang, Xudong Cui, Taotao Gao
Summary: In this work, nitrogen and phosphorus co-doped carbon materials supporting ruthenium nanoparticles were prepared and exhibited outstanding catalytic performance in the hydrogen evolution reaction. The introduction of ruthenium effectively increased the active area and promoted sufficient contact between the catalyst and the electrolyte, resulting in enhanced activity. This work demonstrates the advantages of non-metallic element-doped carbon supports in enhancing the activity of ruthenium, providing important reference for the development of high-efficiency electrocatalysts.
Article
Chemistry, Physical
Liang Li, Xinran Wang, Jinxin Li, Ying Guo, Xiaowei Li, Yongwei Lu
Summary: The Pt-decorated interlayer-expanded MoS2/N-doped carbon composite, Pt-MoS2/CN, was synthesized through a one-pot pyrolysis protocol, exhibiting remarkable HER performance comparable to commercial Pt/C catalyst with low overpotential and high stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Environmental
Lifang Deng, Yuyuan Zhang, Yazhuo Wang, Haoran Yuan, Yong Chen, Yufeng Wu
Summary: An in situ N-, P- and Ca-codoped biochar catalyst was successfully prepared from animal bone, showing high atomic contents and synergistic effects. The catalyst exhibited outstanding performance and stability in hydrogen production from water electrolysis, surpassing synthetic materials in catalytic activity.
RESOURCES CONSERVATION AND RECYCLING
(2021)
Article
Chemistry, Applied
Yubin Kuang, Wei Qiao, Fulin Yang, Ligang Feng
Summary: The combination of MoSe2, Ru, and hollow carbon spheres in the form of Ru nanoparticles anchored on MoSe2 nanosheet-embedded mesoporous hollow carbon spheres greatly enhances the hydrogen evolution reaction. The synergistic effect and charge redistribution induced by the conductive support, oxyphilic MoSe2, and Ru active sites contribute to the high catalytic activity, stability, and kinetics for HER. The interfacial engineering and understanding of the metal-support interaction in Ru-based catalysts development are demonstrated in this work.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Chemistry, Physical
Xinyu Zhang, Yiwen Dong, Huiying Wang, Ziyi Zhao, Wenchun Jiang, Bin Dong, Han Hu, Chenguang Liu, Yongming Chai
Summary: Iron plays a crucial role in the oxygen evolution reaction (OER) activity. Cu doping promotes the deposition of iron active sites on metal hydroxide, and Cu-Co(OH)(2) shows the best iron adsorption capacity. When loaded on a conductive substrate, it exhibits a low overpotential and performs stably in a water electrolyzer.
Article
Engineering, Environmental
Hai -Jun Liu, Ren-Ni Luan, Lu-Yao Li, Ren-Qing Lv, Yong -Ming Chai, Bin Dong
Summary: The preparation of sulfur-doped NiFe2O4 nanocone arrays on iron foams (S-NiFe2O4/IF) via a scalable hydrothermal method is described. The 3D nanocone arrays provide a large electrochemical surface area and allow efficient electrolyte access and oxygen escape. Low-valence Ni atoms in tetrahedron sites are found to be more active than high-valence Fe atoms in this S-doped bimetallic catalyst, and the introduction of sulfur enhances water adsorption and dissociation as well as the adsorption of OER intermediates on Ni sites. The optimized S-NiFe2O4/IF catalyst achieves an industrial-level current density of 500 mA cm-2 at an overpotential of 310 mV and maintains stability for 100 hours in alkaline medium. Furthermore, integrating S-NiFe2O4/IF into an anion-exchange membrane water electrolyzer allows for a current density of 1.0 A cm-2 at 1.79 V.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Ruo-Yao Fan, Hui-Ying Zhao, Yi-Nuo Zhen, Feng-Ge Wang, Han Hu, Yong-Ming Chai, Bin Dong
Summary: This study successfully prepared a stable and efficient non-noble metal-based acidic OER electrocatalyst through a simple ion exchange method. The introduction of trace amounts of manganese improved the stability of cobalt spinel oxide in strong acidic environment without compromising its crystal structure and intrinsic activity.
Article
Energy & Fuels
Hui-Ying Zhao, Ruo-Yao Fan, Zi-Yi Zhao, Xin-Yu Zhang, Bin Dong, Qian-Xi Lv, Xin Liu, Bin Liu, Yong-Ming Chai
Summary: This paper successfully synthesized Fe-doped three-dimensional hybrid structure β-Ni(OH)2/NF, achieving high density of Fe sites on the surface of nickel-based materials. The addition of iron optimized the adsorption/analytical energy of OER reaction intermediates, resulting in excellent OER catalytic activity and stability of Fe2(0.1)-β-Ni(OH)2/NF.
Article
Chemistry, Physical
Hai-Jun Liu, Ning Yu, Xiao-Qing Yuan, Hui-Ying Zhao, Xin-Yu Zhang, Yong-Ming Chai, Bin Dong
Summary: A facile strategy is developed to fabricate FeS-Co9S8 Schottky heterostructures, which exhibit high activity and stability for oxygen evolution reaction (OER).
Article
Chemistry, Physical
Ning Yu, Zhi-Jie Zhang, Xiao-Qing Yuan, Hai-Jun Liu, Yu-Lu Zhou, Ren-Qing Lv, Yi-Bin Liu, Yong-Ming Chai, Bin Dong
Summary: Spinel type oxides, including CoMoO4, are promising catalysts for water electrolysis. However, MoO42_ is easily dissolved during oxygen evolution reaction (OER), leading to poor performance. In this study, Ag was incorporated into the lattice surface of CoMoO4 nanorods using a molten salt method. The results showed that Ag was uniformly distributed in the lattice of the optimized Co1-xAgxMoO4. Ag doping stabilized the Co1-xAgxMoO4 structure and increased the number of oxygen vacancies, reducing charge transfer resistance by about 15 times compared to CoMoO4. Electrochemical measurements demonstrated that Co1-xAgxMoO4 had a lower OER overpotential (330 mV) at 10 mA cm_2 and a 2.7 times longer duration than CoMoO4. DFT calculation revealed that Ag doping optimized the electron distribution and enhanced the covalency of certain bonds, reducing the solubility of Co1-xAgxMoO4. This work highlights the potential of metal ion lattice doping for excellent OER electrocatalysts.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Hai-Jun Liu, Shuo Zhang, Ya-Nan Zhou, Wen-Li Yu, Yu Ma, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: In this study, an inverse-spinel Co,S atomic pair codoped Fe3O4 grown on iron foam (Co,S-Fe3O4/IF) was fabricated as a cost-effective electrocatalyst for efficient oxygen evolution reaction (OER). The strategy of Co and S atomic pair directional codoping accelerates surface reconstruction and dynamically stabilizes electronic regulation, leading to consistently excellent OER performance. The electrochemically tuned Fe-based electrode showed a low overpotential, a slight Tafel slope, and exceptional long-term stability in alkaline medium, indicating its great potential for large-scale water-splitting systems.
Article
Chemistry, Multidisciplinary
Hai-Jun Liu, Shuo Zhang, Yong-Ming Chai, Bin Dong
Summary: This work presents a synergistic ligand modulation plus Co doping strategy to enhance the catalytic activity and durability of 1T-MoS2 catalyst for hydrogen evolution reaction (HER). The results show that the expanded interlayer spacing of 1T-MoS2 promotes active site exposure and accelerates water dissociation, leading to excellent stability and low overpotential for alkaline HER. The formation of three-dimensional metal-organic constructs weakens the hybridization between Mo-3d and S-2p orbitals, making S-2p orbital more suitable for hybridization with H-1s orbital.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Yi-Wen Dong, Hai -Jun Liu, Xiao Wang, Xin-Yu Zhang, Qian-Xi Lv, Chun-Ying Liu, Yong -Ming Chai, Bin Dong
Summary: Trace Mn doping strategy is used to enhance the built-in electric field (BIEF) of FeBTC/NIF, leading to the preparation of Mn-FeBTC/NIF with excellent photoelectric coupling catalytic capability. The elevated BIEF accelerates charge transport and improves catalytic activity. Additionally, the addition of Mn improves the energy band structure and enhances the photocatalytic performance, providing new ideas for increasing the BIEF of heterojunction materials.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Fu-Li Wang, Na Xu, Cheng-Jie Yu, Jing-Yi Xie, Bin Dong, Xin-Yu Zhang, Yi-Wen Dong, Yu-Lu Zhou, Yong-Ming Chai
Summary: A maple leaf-shaped porous heterojunction (Ni2P/Ni7S6) catalyst with rich porosity and high crystal structure was fabricated via one-step molten salt method. The catalyst exhibited abundant active sites and great mechanical strength, achieving an overpotential of 330 mV for 1000 mA cm(-2) and sustaining 500 mA cm(-2) for 700 hours. Moreover, the assembled AEM water electrolyzer delivered 1000 mA cm(-2) at a cell voltage of 1.88 V, operating at an average energy efficiency of 72% for 140 hours.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Fu -Li Wang, Yi-Wen Dong, Cheng-Jie Yu, Bin Dong, Xin-Yu Zhang, Ruo-Yao Fan, Jing -Yi Xie, Ya-Nan Zhou, Yong-Ming Chai
Summary: A facile molten salt method was used to synthesize phase-pure Fe-NiCo2S4 @NIF electrocatalyst with controlled Fe doping assisted by inner Fe element. Fe doping not only maintained mechanical strength but also optimized electronic structure and reduced *OOH adsorption energy barrier. Fe-NiCo2S4 @NIF achieved a low overpotential of 325 mV to reach industrial current density of 1000 mA cm-2 and stable operation for 1000 h in oxygen evolution reaction (OER). The anion exchange membrane (AEM) water electrolyzer (Fe-NiCo2S4 @NIF//(Pt/C)) reached a current density of 1000 mA cm-2 at a cell voltage of 1.83 V with an average energy efficiency of 72% for 100 h.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Meng-Xuan Li, Yu Ma, Bo Xiao, Ya-Nan Zhou, Xue-Jun Zhai, Ren-Qing Lv, Yong-Ming Chai, Bin Dong
Summary: Transition metal phosphides (TMPs) have shown promise as catalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). However, CoP has a strong hydrogen adsorption energy, resulting in a slow Heyrovsky step in the HER. In this study, FeS was ionized and doped into cobalt precursor during the hydrothermal process to regulate the atomic ratio of metal/P. The optimized S, Fe-CoP@IF nanostructure exhibited excellent HER performance, with low overpotentials and high stability. Additionally, it showed improved OER performance and performed well in simulated industrial tests. Density functional theory (DFT) calculations confirmed the improved catalytic activity of dual-doped CoP.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Materials Science, Multidisciplinary
Hui-Ying Wang, Yi-Wen Dong, Xin-Yu Zhang, Jing -Yi Xie, Yong-Ming Chai, Bin Dong
Summary: Spontaneous surface reconfiguration of NiMoO4 during electrooxidation shows significant OER activity. Intentional alteration of electrochemical activation time of NiMoO4 leads to different degrees of reconstitution. Fe doping, achieved by adding Fe3+ to the electrolyte, provides more attachment active sites for Fe and builds a dynamic and stable NiFe(O)OH active interface, thereby improving OER activity. The deeply reconstituted 30 h-10dFe-NiMoO4 exhibits an overpotential of only 279 mV at 100 mA cm-2. This process enriches the impact of electrochemical reconstitution on NiMoO4 performance for OER and provides a new approach to develop efficient electrocatalysts.
Review
Chemistry, Multidisciplinary
Ruo-Yao Fan, Yu-Sheng Zhang, Jing-Yi Lv, Guan-Qun Han, Yong-Ming Chai, Bin Dong
Summary: This article summarizes the research progress of ruthenium-based electrocatalysts in acid-oxygen evolution reaction and proton exchange membrane water electrolysis. The focus is on the methods of balancing the activity and stability of electrocatalysts, and detailed discussions are provided on the activity, stability, and applicability of different types of ruthenium-based electrocatalysts.
Article
Chemistry, Applied
Qingyuan Zheng, Jack H. Williams, Scott Elgersma, Mick D. Mantle, Andrew J. Sederman, G. Leendert Bezemer, Constant M. Guedon, Lynn F. Gladden
Summary: In this study, a pilot-scale fixed-bed reactor compatible with NMR/MRI was developed for Fischer-Tropsch synthesis. Multiple magnetic resonance techniques were applied to quantitatively characterize different product species within catalyst pellets, providing valuable information for catalyst and reactor optimization.
Article
Chemistry, Applied
Lisa Ramisch, Sebastian Pfaff, Sabrina M. Gericke, Edvin Lundgren, Johan Zetterberg
Summary: We present a combination of optical operando techniques that allow simultaneous measurement of adsorbed species on catalyst surfaces, monitoring of surface oxide formation, and imaging of the gas phase above the catalyst surface. The experimental setup was validated by studying CO oxidation on Pd(100) at different pressures, revealing the effects of pressure on the heterogeneous catalytic reaction.
Article
Chemistry, Applied
Marta Paniagua, Gabriel Morales, Juan A. Melero, Daniel Garcia-Salgado
Summary: The influence of common impurities in levulinic acid on the catalytic performance of different acid catalysts for bio-jet fuel production was studied. It was found that furfural had the greatest detrimental effect on catalyst performance, while propyl-sulfonic acid-modified SBA-15 and sulfonic acid resin Amberlyst-70 showed good regeneration ability.
Article
Chemistry, Applied
Jesus Tapiador, Pedro Leo, Guillermo Calleja, Gisela Orcajo
Summary: This study presents a new MOF material, Zn-URJC-13, with acid and basic sites, permanent porosity, and high affinity to CO2 molecules. The Zn-URJC-13 catalyst exhibits efficient performance in CO2 cycloaddition reactions and can be reused multiple times.
Article
Chemistry, Applied
Dan Zhao, Vita A. Kondratenko, Dmitry E. Doronkin, Shanlei Han, Jan-Dierk Grunwaldt, Uwe Rodemerck, David Linke, Evgenii V. Kondratenko
Summary: This study demonstrates the potential of cheap and commercially available Zr or Ti-based supports and ZnO to serve as active and selective catalysts for propane dehydrogenation (PDH). The catalytically active species formed in situ under PDH conditions consist of isolated ZnOx. ZnOx on the surface of LaZrOx shows the highest rate of propene formation.
Article
Chemistry, Applied
Hanbyeol Kim, Jung Rae Kim, Young-Kwon Park, Jeong-Myeong Ha, Jungho Jae
Summary: In this study, metal phosphates were used as catalysts for biomass conversion to produce sustainable aromatics through DielsAlder cycloaddition reactions. The effects of synthesis method, activation method, and P/Ti molar ratio on the structure and acid properties of titanium phosphate catalysts were systematically studied. The mesoporous titanium phosphate catalyst synthesized by hydrothermal method at 180℃ for 12 h followed by ethanol refluxing at 60℃ for 24 h at a molar P/Ti ratio of 1 showed the highest surface area and acid site density.
Article
Chemistry, Applied
Yasin Khani, Sumin Pyo, Kwang-Eun Jeong, Chul-Ung Kim, Moonis Ali Khan, Byong-Hun Jeon, Kun-Yi Andrew Lin, Siyoung Q. Choi, Young-Kwon Park
Summary: A protonated form of Zeolite Socony Mobil-5 (H-ZSM-5) catalyst was synthesized through a hydrothermal method using different sources of silica. The effect of loading the catalyst with yttrium, samarium, and gadolinium on the acidic properties was investigated. Among the metal-loaded catalysts, the Sm/LHZ catalyst showed the best performance in the methanol to propylene conversion due to its high amount of weak and intermediate acid sites, while the Gd-LHZ catalyst increased the selectivity towards ethane and propane.
Article
Chemistry, Applied
Michael Franc, Ivana Cisarova, Jan Vesely
Summary: The present study investigates an enantioselective cyclization of enals with imidazolone derivatives catalyzed by a combination of achiral Pd(0) complex and chiral secondary amine. Corresponding spirocyclic imidazolones were produced in high yields with moderate diastereoselectivity and excellent enantioselectivity. The developed co-operative catalytic methodology provides a highly substituted spirocyclic scaffold with four stereogenic centers under mild conditions.
Article
Chemistry, Applied
Mauro Alvarez, Jennifer Cueto, David P. Serrano, Pablo Marin, Salvador Ordonez
Summary: This study focuses on improving the formulation and preparation methods of catalysts for the production of dimethyl carbonate. By using suitable catalyst preparation methods and copper salt precursors, the researchers successfully produced catalysts with optimal performance for dimethyl carbonate formation.
Article
Chemistry, Applied
Claudia J. Keijzer, Luc C. J. Smulders, Dennie Wezendonk, Jan Willem de Rijk, Petra E. de Jongh
Summary: This study investigates the catalytic behavior of alpha-alumina supported silver catalysts in the presence of chloride. It is found that the particle size of silver can affect the selectivity of the catalyst, but different strategies lead to different results. In this size range, the selectivity of ethylene oxide is correlated to the Ag : Al2O3 surface ratio.
Article
Chemistry, Applied
Takeshi Aihara, Wataru Aoki, Michikazu Hara, Keigo Kamata
Summary: The development of acid-base bifunctional catalysts is important for promoting specific chemical transformations. In this study, Ti-based perovskite oxides were synthesized and used as catalysts for two C-C bond-forming reactions (cyanosilylation and Knoevenagel condensation). The highly pure SrTiO3 nanoparticles with a high specific surface area exhibited the highest catalytic performance, and could be easily recovered and reused.
Article
Chemistry, Applied
Olga Gorlova, Petra Pribylova, Eliska Vyskocilova, Katerina Peroutkova, Jan Kohout, Iva Paterova
Summary: This study investigates the Baeyer-Villiger oxidation of beta-cyclocitral using tin-modified mixed oxides as catalysts. The optimal reaction conditions and the effects of various factors on the reaction course and selectivity were determined. The results show that tin-modified mixed oxides exhibit high activity and selectivity in the oxidation reaction.
Article
Chemistry, Applied
M. I. Avila, M. M. Alonso-Doncel, L. Briones, G. Gomez-Pozuelo, J. M. Escola, D. P. Serrano, A. Peral, J. A. Botas
Summary: The catalytic fast pyrolysis of lignin using ion-exchanged zeolite catalysts showed significant improvements in bio-oil quality and the production of aromatic hydrocarbons and oxygenated compounds.
Article
Chemistry, Applied
Enrico Catizzone, Giorgia Ferrarelli, Paolo Bruno, Girolamo Giordano, Massimo Migliori
Summary: The acid-catalysed alcohol conversion reaction is a promising route for de-fossilization strategies. Research on pure alcohol conversion and simultaneous dehydration of mixed alcohols have shown different product compositions, with the type and distribution of acid sites affecting the reaction mechanism.
Article
Chemistry, Applied
Alireza Ranjbari, Juho Kim, Jihee Yu, Jiyun Kim, Mireu Park, Nayoung Kim, Kristof Demeestere, Philippe M. Heynderickx
Summary: This study investigated a novel kinetic model for the adsorption and photocatalytic degradation of methyl orange using commercial ZnO and reduced ZnO photocatalysts. The results provided new insights into the interaction of catalysts with molecules of different charges and compared with a previous study on methylene blue. The presence of oxygen vacancies in ZnO and their effects on adsorption and photocatalytic degradation were analyzed, and the photocatalytic degradation rate of reduced ZnO was found to increase significantly.