Article
Engineering, Environmental
Yong-Ming Dai, Chen-Yin Li, Wei -Ho Ting, Jih-Mirn Jehng
Summary: By adjusting the mass ratio of two components, AgVO3 and TiO2 nanowires, an optimized AgVO3/Ag/TiO2 nanowires composite material is successfully fabricated. The composite material exhibits enhanced photocatalytic performance due to improved utilization of light, efficient separation and transfer of photogenerated electron-hole pairs. Additionally, the surface plasmon resonance effect of the composite material also facilitates the photocatalytic reaction.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Review
Environmental Sciences
Yujun Chen, Bin Guan, Xingze Wu, Jiangfeng Guo, Zeren Ma, Jinhe Zhang, Xing Jiang, Shibo Bao, Yiyan Cao, Chengdong Yin, Di Ai, Yuxuan Chen, He Lin, Zhen Huang
Summary: With global climate change, the utilization of carbon dioxide as a resource to achieve carbon peaking and carbon neutrality has gained significant attention. Photocatalysis, as an emerging discipline, relies solely on sunlight and has unique properties and mechanisms. The development of photocatalysts with high activity, selectivity, cost-effectiveness, and durability is crucial.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Chemistry, Multidisciplinary
Radu-George Ciocarlan, Natan Blommaerts, Silvia Lenaerts, Pegie Cool, Sammy W. W. Verbruggen
Summary: Direct photocatalytic reduction of CO2 has become a highly active research field. Maintaining an overview of the materials used and finding common trends is important for improving the current conversions and selectivities. Plasmonic photocatalysts for CO2 photoreduction under solar light have gained significant attention, and this review aims to provide insights into current developments, classifying studies based on product selectivity to identify trends and generate new ideas for improving photoreduction yield and selectivity.
Article
Chemistry, Physical
Zhengwei Xiong, Hongwen Lei, Jia Yang, Yi Liu, Zhipeng Gao, Yuxin Li, Chenchun Hao, Jian Wang
Summary: A tunable nanocomposite structure composed of Ni nanoparticles with various morphologies and controllable BaTiO3 films was designed, showing absorption and photoluminescence enhancement in the deep-ultraviolet region. The study revealed that embedding more Ni NPs can increase electron-hole recombination possibilities, enhancing optical emission intensity and expanding the emission range.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Jing Li, Guangzhong Xie, Jin Jiang, Yanyou Liu, Chunxu Chen, Weixiong Li, Junlong Huang, Xiaolan Luo, Ming Xu, Qiuping Zhang, Min Yang, Yuanjie Su
Summary: Piezo-potential promoted photocatalysis shows promise in efficient dye decomposition, but it is limited by low quantum yield and piezoelectric activity of catalysts. In this study, a heterogeneous CdS-Au composite photocatalyst was synthesized and showed enhanced photocatalytic activity for organic pollutants degradation. The synergistic effect of piezo-phototronic and localized surface plasmon resonance facilitated efficient carrier separation and internal quantum efficiency. The loading of Au nanoparticles modulated CdS nanosphere properties and improved photocatalytic activity for Methyl Orange degradation.
Article
Chemistry, Physical
Yun Zhou, Peng Zheng, Fang Wang, Fangna Gu, Wenqing Xu, Qinyang Lu, Tingyu Zhu, Ziyi Zhong, Guangwen Xu, Fabing Su
Summary: This study successfully prepared a three-dimensional honeycomb N-doped carbon nanomaterial with good photothermal catalytic performance, and investigated the synergistic effect of NiO@Ni and NC on the CO2 reduction reaction and water splitting reaction.
Article
Multidisciplinary Sciences
Alexandra Tavasoli, Abdelaziz Gouda, Till Zahringer, Young Feng Li, Humayra Quaid, Camilo Viasus J. Perez, Rui Song, Mohini Sain, Geoffrey Ozin
Summary: This study demonstrates improved photocatalytic dry reforming performance by selectively phosphating the surface of a CeO2 nanorod support to modulate the surface basicity of a Ni-CeO2 photocatalyst. An optimum phosphate content is found, leading to little activity loss and carbon deposition over a 50-hour reaction period. The enhanced performance is attributed to the Lewis basic properties of the PO43- groups, which improve CO2 adsorption, facilitate the formation of small nickel metal clusters, and provide mechanical stability. A hybrid photochemical-photothermal reaction mechanism is also demonstrated.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Jun Zhou, Wei He, Hui Liu, Cheng Zhi Huang
Summary: Studying the energy flow and excited charge carriers in plasmonic nanoparticle-adsorbate systems revealed the critical role of dissolved oxygen molecules in activating the oxidation reaction.
Article
Chemistry, Multidisciplinary
Yimin Zhang, Lei Yan, Mengxue Guan, Daqiang Chen, Zhe Xu, Haizhong Guo, Shiqi Hu, Shengjie Zhang, Xinbao Liu, Zhengxiao Guo, Shunfang Li, Sheng Meng
Summary: Studying the dynamics of hot carriers between plasmonic nanomaterials and adsorbates is crucial for understanding plasmon-enhanced photoelectronic processes. By using CO2 reduction as a case study, researchers have successfully probed the mechanisms of plasmon-driven catalysis at the single-molecule level through density functional theory calculations. The study reveals a nonlinear relationship between laser intensity and reaction rate, indicating a synergistic interplay and transition from indirect hot-electron transfer to direct charge transfer.
Article
Multidisciplinary Sciences
Min Zhou, Zhiqing Wang, Aohan Mei, Zifan Yang, Wen Chen, Siyong Ou, Shengyao Wang, Keqiang Chen, Peter Reiss, Kun Qi, Jingyuan Ma, Yueli Liu
Summary: An electrostatically driven self-assembly approach is used to construct bifunctional LaNi sites within a covalent organic framework, enabling simultaneous light absorption and catalytic activity for photocarriers generation and CO2-to-CO reduction. The introduction of phenanthroline facilitates directional charge transfer between LaNi double-atomic sites, reducing reaction energy barriers and enhancing CO2 conversion efficiency. This work achieves a significant enhancement in CO2 reduction rate and improved CO selectivity without additional photosensitizers, presenting a potential strategy for enhancing photocatalytic CO2 reduction.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Yingxuan Li, Miaomiao Wen, Ying Wang, Guang Tian, Chuanyi Wang, Jincai Zhao
Summary: The study demonstrates that cost-effective Bi2O3-x with oxygen vacancies can efficiently catalyze the conversion of CO2 to CO under low-intensity near-IR light, thanks to the defects inducing localized surface plasmon resonance. The unique LSPR allows for a linear dependence of photocatalytic CO production rate on light intensity and operating temperature.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Wenjie Ma, Yingqi Zhu, Xuewu Wang
Summary: In this research, Au nanoparticles modified HNTs/g-C3N4/CdS composite photocatalyst was prepared for highly-efficient photocatalytic reaction. The results showed that the introducing Au nanoparticles can accelerate the photo-electric conversion and separation, greatly improving the performance of the catalyst. Additionally, the HCAC-3 composite catalyst exhibited excellent photodegradation activity and photocatalytic stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Dip Kumar Nandi, Jhumur Seth, Pekham Chakrabortty, Swarbhanu Ghosh, Avik Chowdhury, Asim Bhaumik, Sk Manirul Islam
Summary: In this study, a composite catalyst consisting of a triazine based porous organic polymer and nickel nanoparticles was synthesized, and it showed excellent photocatalytic activity for the reduction of CO2 to methanol. The composite catalyst exhibited high surface area and low band gap, and demonstrated high catalytic efficiency and recyclability, indicating great potential for renewable carbon source methanol synthesis.
Article
Chemistry, Multidisciplinary
Juan-Ru Huang, Wen-Xiong Shi, Shen-Yue Xu, Hao Luo, Jiangwei Zhang, Tong-Bu Lu, Zhi-Ming Zhang
Summary: By implanting single atom Fe into nanotubes, controllable production of methanol and CO/CH4 can be achieved. In pure water, the methanol yield reaches 154.20 mu mol g(cat)(-1) h(-1) with 98.90% selectivity, while the yield and selectivity of CO/CH4 are also high when the catalyst is outside water. This research provides new insight for water-mediated CO2 photoreduction.
ADVANCED MATERIALS
(2023)
Article
Multidisciplinary Sciences
Pin Lyu, Randy Espinoza, Md. Imran Khan, William C. Spaller, Sayantani Ghosh, Son C. Nguyen
Summary: In this study, the role of hot holes in the photocatalysis process was explored using mesoporous Pd nanoparticle photocatalyst. The findings suggest that deeper holes in the d-band facilitate the catalytic reaction.
Article
Chemistry, Multidisciplinary
Cuncai Lv, Xianhua Bai, Shangbo Ning, Chenxi Song, Qingqing Guan, Bang Liu, Yaguang Li, Jinhua Ye
Summary: Converting CO2 into fuels or chemicals through photothermal catalysis is a promising solution for energy shortage and global warming. Understanding nanomaterial strategies in this process is crucial for device and catalyst design, as well as maximizing CO2 hydrogenation performance. This Perspective discusses nanomaterial design concepts, reviews recent progress, and highlights challenges and opportunities in photothermal CO2 hydrogenation.
Article
Chemistry, Multidisciplinary
Hui Song, Hengming Huang, Xianguang Meng, Qi Wang, Huilin Hu, Shengyao Wang, Hongwei Zhang, Wipakorn Jewasuwan, Naoki Fukata, Ningdong Feng, Jinhua Ye
Summary: Direct photocatalytic oxidation of methane to liquid oxygenated products at room temperature is achieved using atomically dispersed nickel anchored on a nitrogen-doped carbon/TiO2 composite (Ni-NC/TiO2) catalyst. The Ni-NC/TiO2 catalyst exhibits high activity and selectivity for the formation of Cl oxygenates, with a yield of 198 umol and a selectivity of 93% in 4 hours. The enhanced performance is attributed to the presence of single-atom Ni-NC sites that facilitate electron transfer and activate O2 to form reactive oxygen species.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Yu Nie, Tingting Bo, Wei Zhou, Huilin Hu, Xiang Huang, Huaiyuan Wang, Xin Tan, Lequan Liu, Jinhua Ye, Tao Yu
Summary: Regulating the energy barrier of *COOH is crucial for the rate determining step in the photocatalytic reduction of CO2 to produce CO gas. In this study, an appropriate Zn vacancy on ZnIn2S4 was synthesized to enhance the photocatalytic CO2 reduction capacity (CO: 5.63 mmol g(-1) h(-1)) and selectivity (CO: 97.9%). Different sulfhydryl groups were used to regulate the formation of Zn vacancies in ZnIn2S4, leading to the generation of unsaturated sulfur coordination state adjacent to the Zn vacancy with fewer electrons compared to ZnIn2S4 without Zn vacancy. Experimental analysis and theoretical calculations demonstrated that the appropriate Zn vacancy shifted the Gibbs free energy of *COOH from endothermic to exothermic during the photoreduction of CO2. This work provides an engineering method to optimize cation vacancies and improve the efficiency of photocatalytic CO2 reduction by adjusting the energy barrier of intermediates.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Nanoscience & Nanotechnology
Wuqing Luo, An Li, Baopeng Yang, Hong Pang, Junwei Fu, Gen Chen, Min Liu, Xiaohe Liu, Renzhi Ma, Jinhua Ye, Ning Zhang
Summary: A hexagonal phase ZnS photocatalyst is synthesized and exhibits higher CO selectivity and better activity for CO2 reduction reactions compared to cubic ZnS. The study provides valuable insights into the synthesis and electronic structure of hexagonal ZnS for CO2 reduction reactions, which can inspire the design of highly active photocatalysts.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Xuelian Yu, Jian Xu, Jiangpeng Wang, Jinyu Qiu, Xiaoqiang An, Zhuan Wang, Guocheng Lv, Libing Liao, Jinhua Ye
Summary: In this study, a new protocol of natural Z-Scheme heterostructures based on red mud bauxite waste was demonstrated. The improved component and interfacial structure enabled efficient spatial separation of photo-generated carriers for overall water splitting, making it a promising photocatalyst for solar fuel production. This work presents the first Z-Scheme heterojunction based on natural minerals and provides a new avenue for the utilization of natural minerals for advanced catalysis applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Kang Peng, Jingying Ye, Hongjie Wang, Hui Song, Bowen Deng, Shuang Song, Yihan Wang, Linjie Zuo, Jinhua Ye
Summary: This study demonstrates that Ru nanoparticles supported on natural halloysite nanotubes can enhance the photothermal catalytic activity and selectivity of CO2 methanation under continuous flow conditions. The optimized catalyst exhibits a photothermal catalytic performance of 1704 mmolCH(4) g(cat)(-1) h(-1) with 93% CH4 selectivity and 68% CO2 conversion, surpassing other Ru-based catalysts in photothermal CO2 reduction. The excellent catalytic performance is attributed to the unique mesoporous tubular structure, efficient light-to-heat conversion, and interfacial interactions between halloysite nanotubes and Ru. This method of utilizing natural minerals as support provides a convenient approach for the rational design of abundant and low-cost catalysts for efficient photothermal catalytic CO2 reduction.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Xinmin Yang, Jiwei Cui, Xiaolu Liu, Qiqi Zhang, Defa Wang, Jinhua Ye, Lequan Liu
Summary: Cocatalyst is crucial in photocatalytic overall water splitting (POWS), but it also promotes H2-O2 recombination. In this study, a strategic approach of selectively coating single-layer graphene on metal cocatalyst was developed to suppress the backward reaction for efficient POWS. The results demonstrate the effectiveness of this method and its potential in developing cocatalysts with suppressed backward reaction for efficient POWS.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Bowen Deng, Hui Song, Qi Wang, Jianan Hong, Shuang Song, Yanwei Zhang, Kang Peng, Hongwei Zhang, Tetsuya Kako, Jinhua Ye
Summary: A Ru/In2O3 catalyst is reported for efficient and stable photothermal CH3OH production from CO2 hydrogenation under atmospheric pressure. The catalyst demonstrates a remarkable solar CH3OH production, which is more than 50 times higher than that of pure In2O3 and surpasses other reported In2O3-based photothermal catalysts. Detailed characterizations show that the interaction between Ru and In2O3 enhances the activation of CO2 and H-2, and Ru modulates the electronic structure of In2O3, promoting the generation of oxygen vacancies for CH3OH formation. This work provides a rational design approach for efficient catalysts in solar CH3OH production from CO2 hydrogenation under mild conditions.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Multidisciplinary Sciences
Shengyao Wang, Bo Jiang, Joel Henzie, Feiyan Xu, Chengyuan Liu, Xianguang Meng, Sirong Zou, Hui Song, Yang Pan, Hexing Li, Jiaguo Yu, Hao Chen, Jinhua Ye
Summary: Tracking the products of CO2 photoreduction is challenging due to low conversion efficiency and carbon contamination. Isotope-tracing experiments are commonly used but often yield false-positive results. Accurate and effective strategies for evaluating CO2 photoreduction products are needed.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Hao Wu, Lei Zhang, Songying Qu, Aijun Du, Junwang Tang, Yun Hau Ng
Summary: Hydrogen dopants and oxygen vacancies are important in BiVO4 photoanodes, but the impact of hydrogenation on charge transport, particularly electron small polaron formation, is not well understood. This study demonstrates that mild hydrogenation of nanoporous BiVO4 reduces the charge transport barrier, as shown by thermally activating photocurrent responses. The hydrogen atoms occupy oxygen vacancies, reducing the activation energy and facilitating electron small polaron transport. A BiVO4 photoanode with NiFeOx cocatalyst achieves an applied-bias photon-to-current efficiency of 1.91% at 0.58 V vs RHE. This study expands the understanding of hydrogen doping beyond conventional donor density/surface chemisorption mediations to include small polaron hopping.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Hao Huang, Shengyao Wang, Xingce Fan, Davin Philo, Liping Fang, Wenguang Tu, Teng Qiu, Zhigang Zou, Jinhua Ye
Summary: Au NPs and TiO2 are integrated via a solid-state dewetting technique, and the plasmonic frequencies range from visible to NIR region. The system allows for the photofixation of N-2 to NH3 under NIR light, offering a carbon-free and sustainable strategy for NH3 production. The Au/TiO2 plasmonic photocatalyst system shows stable performance and has the potential for better utilization of solar energy for nitrogen fixation.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Applied
Hong Pang, Fumihiko Ichihara, Xianguang Meng, Lijuan Li, Yuqi Xiao, Wei Zhou, Jinhua Ye
Summary: This study investigates the influence of different transition metal ions on the photocatalytic CO2 reduction using copper-doped ZnS nanocrystals as the main catalyst. It was found that Ni2+, Co2+, and Cd2+ enhanced CO2 reduction, while Fe2+ suppressed the photocatalytic activity. The modified ZnS:Cu photocatalysts demonstrated tunable product selectivity, with Ni2+ and Co2+ showing high selectivity for syngas production and Cd2+ displaying remarkable formate selectivity.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Bin Chang, Hong Pang, Fazal Raziq, Sibo Wang, Kuo-Wei Huang, Jinhua Ye, Huabin Zhang
Summary: In this review, the recent progress and challenges in preparing C2+ products are discussed. The recent advancements in carbon-carbon coupling results and proposed mechanisms are elaborated, along with the complex scenarios involved in the initial CO2 activation process, catalyst micro/nanostructure design, and mass transfer conditions optimization. The synergistic realization of high C2+ product selectivity through catalyst design and the influence of electrolytes using theoretical calculation analysis and machine learning prediction are also proposed. The in situ/operando techniques for tracking structural evolution and recording reaction intermediates during electrocatalysis are elaborated, as well as insights into triphasic interfacial reaction systems with improved C2+ selectivity.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Chengcheng Zhang, Yingkui Yan, Hubiao Huang, Xinsheng Peng, Hui Song, Jinhua Ye, Li Shi
Summary: Fe@PCN-222 is an efficient and selective photocatalyst that can oxidize CH4 to liquid oxygenates at room temperature using visible light. The presence of Fe single-atoms promotes the transfer of photogenerated electrons and activates H2O2, resulting in a substantial improvement in the selectivity and activity of liquid oxygenate production.
Review
Chemistry, Physical
Long Yang, Amol U. Pawar, Ramesh Poonchi Sivasankaran, Donkeun Lee, Jinhua Ye, Yujie Xiong, Zhigang Zou, Yong Zhou, Young Soo Kang
Summary: This review focuses on the identification, conversion, reaction kinetics, pathways, and mechanisms of intermediates, as well as the efficiency and selectivity of multicarbon product formations during photocatalytic and electrocatalytic CO2 reduction. Theoretical simulations and calculations provide deeper insights into this process. Future research directions and inspirations are also included to guide the integration of catalytic systems.
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.
