Article
Chemistry, Multidisciplinary
Yazhou Zhou, Ruihu Lu, Xiafang Tao, Zijie Qiu, Guangbo Chen, Juan Yang, Yan Zhao, Xinliang Feng, Klaus Muellen
Summary: By incorporating phosphorus atoms into the second coordination sphere, the OER activity of Fe-N-C is boosted, enabling its potential application in rechargeable Zn-air batteries.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Zhe Chen, Dengyu Zhao, Cong Chen, Yuan Xu, Congli Sun, Kangning Zhao, Muhammad Arif Khan, Daixin Ye, Hongbin Zhao, Jianhui Fang, Xueliang Andy Sun, Jiujun Zhang
Summary: The study presents a novel three-dimensional hierarchically architectural single atomic Fe-N-C catalyst with outstanding catalytic performance in the oxygen reduction reaction. By optimizing surface structure and active site density, the catalyst shows great potential for application in energy conversion and storage devices.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Engineering, Environmental
Yibin Tong, Junqing Li, Junchen Peng, Dandan Dong, Fei He, Mingyuan Zhu, Chaofeng Huang
Summary: The Fe-N-C adsorbent shows superior desulfurization capability and recyclability, effectively removing sulfur compounds without significant deactivation. By modulating the material structure, the binding strength of adsorption sites can be optimized to enhance desulfurization efficiency.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Youpeng Wang, Qiulin Li, Long-cheng Zhang, Yuanke Wu, Hao Chen, Tianhao Li, Maowen Xu, Shu-Juan Bao
Summary: This study presents a gel-limiting strategy for fabricating Fe-N-C single-atom catalysts and evaluates its feasibility for large-scale applications. The Fe-SASCs exhibited superior electrocatalytic performance compared to commercial Pt/C and were successfully used in a homemade Zn-air battery, demonstrating practical application value. The reported strategy has the potential to be further developed for the preparation of more transition metal SASCs in the future.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Physical
Weibin Qiu, Na Yang, Dan Luo, Jiayi Wang, Lirong Zheng, Yuchen Zhu, Eser Metin Akinoglu, Qianming Huang, Lingling Shui, Rongming Wang, Guofu Zhou, Xin Wang, Zhongwei Chen
Summary: This study investigated the impact of coordinative unsaturation and nitrogen vacancies on carbon-based catalysts for electrocatalytic ammonia synthesis, showing a synergistic improvement in catalytic activity, selectivity, and stability. This work provides new theoretical and synergistic guidance for the design of high-performance catalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Xue Yao, Zhiming Zhang, LiXin Chen, Zhi-Wen Chen, Yong-Fu Zhu, Chandra Veer Singh
Summary: The work function-activity relationship provides a new strategy for catalyst design. Lower work function is believed to enhance catalytic activity by facilitating electron transfer. This study investigates the effect of tailored work function on nitrogen fixation catalysis by nitrogenase-like Fe double-atom catalysts (Fe2/MX2). It is found that a lower work function impairs catalytic activity due to overstrong N2 adsorption on Fe2/MX2. However, Fe2/VS2, Fe2/CrS2, Fe2/MoS2, and Fe2/WS2 with relatively large work function values show excellent activity towards N2 fixation.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Yangyang Liu, Fengdi Tu, Ziyu Zhang, Zigang Zhao, Pan Guo, Lixiao Shen, Yunlong Zhang, Lei Zhao, Guangjie Shao, Zhenbo Wang
Summary: This study presents a new approach to tailor the catalyst architecture and improve the accessibility of active sites. By using a carboxylate molecular scissor, a multi-dimensional concave Fe@NC catalyst structure with dense accessible active sites, multidimensional mass transfer pathways, hierarchical porous structure, and entangled carbon nanotubes network is constructed. The tailored Fe@MNC-OAc electrocatalyst exhibits excellent ORR activity in acidic media and delivers a high peak power density in a proton exchange membrane fuel cell.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Ting Yang, Shisuo Fan, Yang Li, Qi Zhou
Summary: A high-efficient iron-based heterogeneous catalyst with atomically dispersed Fe-Nx sites was prepared for the activation of peroxymonosulfate (PMS). Single-atom iron-nitrogen-carbon catalysts exhibited superior performance in catalytic activation of PMS, with Fe-Nx sites confirmed as the main active sites.
CHEMICAL ENGINEERING JOURNAL
(2021)
Letter
Chemistry, Physical
Kang Liu, Junwei Fu, Tao Luo, Ganghai Ni, Hongmei Li, Li Zhu, Ye Wang, Zhang Lin, Yifei Sun, Emiliano Cortes, Min Liu
Summary: The active moieties of Fe-N-C single-atom catalysts during the oxygen reduction reaction (ORR) depend on the applied potential. Through constant potential density functional theory calculations, we investigated the ORR activity of various active moieties (Fe-N-4, Fe-(OH)N-4, Fe-(O-2)N-4, and Fe-(OH2)N-4) over a wide potential window. Our findings revealed that the Fe-(OH2)N-4, *O-2-assisted Fe-N-4, and Fe-(OH)N-4 moieties dominate the ORR activity of Fe-N-C catalysts at different potential windows by modifying the single-atom Fe sites and promoting *OH protonation. These results provide guidance for understanding the active moieties of single-atom catalysts.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Mingming Zhang, Cui Lai, Fuhang Xu, Danlian Huang, Tianjue Hu, Bisheng Li, Dengsheng Ma, Shiyu Liu, Yukui Fu, Ling Li, Lin Tang, Liang Chen
Summary: In this study, single Fe atoms were successfully immobilized on Fe-SA/CN, which exhibited high efficiency in generating hydrogen peroxide (H2O2) through oxalic acid and O2 activation. Under visible light, the H2O2 concentration generated by Fe-SA/CN reached 40.19 mM g(-1) h(-1), which was 10.44 times higher than that of g-C3N4. This enhancement can be attributed to the formation of metal-organic complexes and rapid electron transfer. Furthermore, the O2 activation capacity of Fe-SA/CN was found to be higher than that of g-C3N4, facilitating H2O2 formation. Density functional theory calculations revealed that O2 was chemically adsorbed on Fe atomic sites, promoting O2 adsorption and activation. The photocatalytic mechanism of SACs-catalyzed H2O2 generation was also elucidated, providing a deeper understanding of this process.
Article
Chemistry, Multidisciplinary
Saerom Yu, Zachary Levell, Zhou Jiang, Xunhua Zhao, Yuanyue Liu
Summary: This study calculates the activation energies of each step of oxygen reduction reaction (ORR) on Fe-N-C and finds that the rate-limiting step is the replacement of oxygen molecule for adsorbed water on Fe. Interestingly, the barrier reduces with the decrease of electrode potential, which can be explained by the stronger Fe-O-2 binding and weaker Fe-H2O binding.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Biology
Trixia M. Buscagan, Jens T. Kaiser, Douglas C. Rees
Summary: This study presents crystallographic data demonstrating chalcogenide exchange at the Fe4S4 cluster of nitrogenase Fe protein under certain conditions, revealing the unique properties of Fe protein in nitrogenase reactions.
Article
Chemistry, Multidisciplinary
Shoufu Cao, Shuxian Wei, Xiaofei Wei, Sainan Zhou, Hongyu Chen, Yuying Hu, Zhaojie Wang, Siyuan Liu, Wenyue Guo, Xiaoqing Lu
Summary: This study demonstrates that N, S coordination may provide a better catalytic environment for single atom catalysts than regular N coordination, making Fe-N2S2 porphyrin a high-performance CO2RR catalyst.
Article
Chemistry, Physical
Jinwoo Woo, Hyunkyung Choi, Young Jin Sa, Ho Young Kim, Taejung Lim, Jue-Hyuk Jang, Sung Jong Yoo, Jin Young Kim, Chul Sung Kim, Sang Hoon Joo
Summary: Silica-based protective-layer or intermediate layer-assisted synthesis strategies have been developed to generate catalytically active Fe-N-x sites while suppressing inactive Fe clusters. The formation of iron silicide (Fe-Si) species after silica coating was identified, resulting in a higher density of active Fe-N-x species in the Fe-N/C catalyst prepared with silica coating compared to that without silica coating. Consequently, the Fe-N/C catalyst with silica coating exhibited a kinetic current density for the ORR twice as high as that without silica coating.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Jiheon Kim, Seong-Jun Kim, Euiyeon Jung, Dong Hyeon Mok, Vinod K. Paidi, Jaewoo Lee, Hyeon Seok Lee, Yunseo Jeoun, Wonjae Ko, Heejong Shin, Byoung-Hoon Lee, Shin-Yeong Kim, Hyunjoong Kim, Ji Hwan Kim, Sung-Pyo Cho, Kug-Seung Lee, Seoin Back, Seung-Ho Yu, Yung-Eun Sung, Taeghwan Hyeon
Summary: This study presents a modification of the local coordination structure of FeN4 moieties through morphological engineering of graphene support. The modified active sites play a key role in enhancing the electrocatalytic activity of lithium-sulfur batteries.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Dongxu Jiao, Zhongxu Wang, Yuejie Liu, Qinghai Cai, Jingxiang Zhao, Carlos R. Cabrera, Zhongfang Chen
Summary: A new class of two-dimensional nanomaterials, transition-metal phosphide monolayers (TM2P, TM = Ti, Fe, Zr, Mo, and W), were proposed as potential electrocatalysts for urea production. The Mo2P monolayer exhibited the best catalytic activity for urea synthesis due to its small kinetic energy barrier, low limiting potential, and suppressing effects on competing side reactions. The optimal adsorption strength with the key *NCON species on the Mo active sites contributed to the outstanding catalytic activity. These findings not only propose a novel catalyst for urea production but also broaden the potential applications of metal phosphides in electrocatalysis.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Physical
Jing Li, Xiangyu Guo, Xuemin Hu, Wei Wang, Yuanyuan Tai, Min Xie, Zhi Li, Shengli Zhang, Haibo Zeng
Summary: The interface engineering strategy proposed in this study utilizes the structural characteristics of perovskite and the mirror asymmetry of 2D Janus material to achieve multifunctionality in the CsPbBr3/Janus MoSSe heterostructure. By modulating the atomic terminal contacts, both type-I and type-II band alignment can be achieved simultaneously in this heterostructure. The interface dipole and its induced interface potential step play a crucial role in shifting the band alignment. The interface effect enables adjustable band gaps and band types, as well as improved light absorption in the visible and ultraviolet regions. Furthermore, gate voltage regulation can transition the band alignment from intrinsic type-II to type-I or type-III in the CsBr-T/SMoSe heterostructure. These findings expand the functionality of perovskite-based heterostructures and provide possibilities for high-efficiency multifunctional nanodevices.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Gaoxiang He, Linguo Lu, Ningsi Zhang, Wangxi Liu, Zhongfang Chen, Zhaosheng Li, Zhigang Zou
Summary: The effects of halogen doping in beta-Fe2O3 semiconductor on its band structures and electron-hole recombination were investigated. Doping Br, I, and At leads to transformation from direct-band-gap semiconductor to indirect-band-gap semiconductor due to large atomic radii. F- and Cl-doped beta-Fe2O3 remain as direct-band-gap semiconductors. Cl dopant narrows the band gap by approximately 0.3 eV and increases the solar to hydrogen efficiency for solar water splitting.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Zhen Gao, Fengxian Ma, Hongbo Wu, Yongheng Ge, Ziming Zhu, Ying Liu, Yalong Jiao, Zhongfang Chen
Summary: In this study, by using first principles computations, we predicted that a two-dimensional Dirac nodal loop semimetal, RuB4, can be a superior catalyst for the hydrogen evolution reaction (HER) with high carrier mobility, activity, and an active basal plane. The RuB4 monolayer is thermodynamically, dynamically, mechanically, and thermally stable, and provides multiple Ru and B sites for the HER on the basal plane. It also shows high Fermi velocities and novel mechanical properties due to its Dirac nodal loop semimetal structure.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Xiaoqiong Bian, Qianqian Liu, Shuyi Xie, Wenkai Chen, Xiangyu Guo, Kaining Ding
Summary: Through density functional theory calculations, it was found that the metalloid boron atom can act as a highly active site for the electrochemical reduction of acetonitrile. The boron doped catalysts, specifically B/C2N, demonstrated excellent stability, selectivity, and resistance to poisoning. The boron-embedded C2N (Bint/C2N) showed the highest catalytic performance with the lowest limiting potential of -0.11 V. This work provides theoretical guidance for the development of novel and efficient metal-free electrocatalysts for the reduction of acetonitrile.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Yanmei Hu, Xiaohui Hu, Yifeng Wang, Chunhua Lu, Arkady V. Krasheninnikov, Zhongfang Chen, Litao Sun
Summary: By using density functional theory calculations, it is found that the use of 2D metals as electrodes can effectively suppress the Fermi level pinning effect and achieve tunable Schottky barrier in CrX3 (X = I, Br) monolayers. These findings are important for electrode selection and the development of CrX3-based spin devices.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Multidisciplinary Sciences
Zengxia Pei, Hao Tan, Jinxing Gu, Linguo Lu, Xin Zeng, Tianqi Zhang, Cheng Wang, Luyao Ding, Patrick J. Cullen, Zhongfang Chen, Shenlong Zhao
Summary: The authors demonstrate that insulative polymeric hydrogels can serve as metal-free oxygen evolution electrocatalysts with significant extension potentials.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Manman Ren, Xiangyu Guo, Shengli Zhang, Shiping Huang
Summary: Using density functional theory computations, researchers identified graphdiyne and holey graphyne supported single-atom catalysts (SACs) as promising candidates for electrochemical CO2 reduction reaction (CO2RR). They found 25 catalysts that effectively activate CO2 and inhibit hydrogen evolution, with 8 of them showing higher activity for CH4 production than Cu(211). The study also revealed the impact of support materials on limiting potentials and reaction pathways, and machine learning was used to predict the activity of other SACs.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xinliang Fu, Mei Wang, Yuanzhi Jiang, Xiangyu Guo, Xin Zhao, Changjiu Sun, Li Zhang, Keyu Wei, Hsien-Yi Hsu, Mingjian Yuan
Summary: Mixed-halide perovskites can be precisely tuned across the entire spectral range using composition engineering. However, ion migration in mixed halide perovskites under continuous illumination or electric field hinders the application of perovskite light-emitting diodes (PeLEDs). A novel approach that introduces strong and homogeneous halogen bonds within the quasi-two-dimensional perovskite lattices effectively suppresses ion migration, enhancing the stability of quasi-2D mixed-halide perovskite films. These PeLEDs exhibit an impressive 18.3% EQE with pure red emission and demonstrate a long operational half-life of approximately 540 minutes, making them one of the most stable mixed-halide pure red PeLEDs reported to date.
Article
Chemistry, Physical
Linke Yu, Fengyu Li, Jingsong Huang, Bobby G. Sumpter, William E. Mustain, Zhongfang Chen
Summary: In this work, a combination of first-principles density functional theory (DFT) and machine learning (ML) was used to explore the potential of double-atom catalysts (DACs) on defective graphene for CO2 reduction reactions. Stable DACs were identified based on their binding energy, formation energy, and dissolution potential, and machine learning models were employed to predict potential electrocatalysts.
Article
Chemistry, Multidisciplinary
Xiangyu Guo, Shengli Zhang, Liangzhi Kou, Chi-Yung Yam, Thomas Frauenheim, Zhongfang Chen, Shiping Huang
Summary: In this study, a data-driven framework was developed to explore potential 2D materials with high electrocatalytic activity and stability for oxygen electrocatalysis. Through comprehensive evaluation of over 6300 materials, 1411 candidates were identified, and further computational analysis revealed the possible dissolution and oxidation of active materials under reaction conditions. Based on these findings, 24 ORR catalysts and 2 OER catalysts with superior activity and stability were screened out, providing a pathway for designing high-performance electrocatalysts for practical applications.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Wei Chen, Mengdi Huang, Xianfeng Yi, Yu Hui, Pan Gao, Guangjin Hou, Alexander G. Stepanov, Yucai Qin, Lijuan Song, Shang-Bin Liu, Zhongfang Chen, Anmin Zheng
Summary: Carbocations are important in catalytic reactions, but their instability makes it difficult to study them thoroughly. Stabilizing carbocations would greatly enhance our understanding of reaction mechanisms.
Article
Chemistry, Physical
Lihong Zhang, Xiangyu Guo, Shengli Zhang, Thomas Frauenheim, Shiping Huang
Summary: This study reports a new type of double atom catalysts (HDACs) for the hydrogen evolution reaction (HER). By introducing nonmetal atoms near the metal sites, unique charge communication is enabled, leading to different catalytic activity compared to single atom counterparts. Machine learning analysis identifies key characteristics affecting catalytic activity and establishes a predictable framework for fast screening of unknown HDACs.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Lili Xu, Lei Zheng, Yu Jing, Xiangyu Guo, Xuemin Hu, Bo Xu, Shengli Zhang
Summary: This study conducted high-throughput calculations to find new candidate materials for the electron transport layer of high-performance perovskite light-emitting diodes. Among the identified candidates, 2D Tp-DAAQ and 2D Tp-DABDA with electron-accepting substituents showed the most promising performance.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Yu Liu, Wenlong Li, Fengyu Li, Zhongfang Chen
Summary: By using DFT computations, we discovered 12 stable 2D disulfide monolayers with various magnetic and electronic properties. These monolayers show potential applications in photocatalysis and electrochemical reactions. This work provides theoretical guidance for further experimental and theoretical explorations.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
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.
