Article
Chemistry, Physical
Feng He, Jiahao Zhuang, Bin Lu, Xianglin Liu, Jianling Zhang, Fangna Gu, Minghui Zhu, Jing Xu, Ziyi Zhong, Guangwen Xu, Fabing Su
Summary: The novel Ni-Zr-Al catalysts show superior low-temperature activity in CO2 methanation compared to Ni-Al catalysts and commercial Ni-based catalyst, due to the synergetic effects between Ni and ZrO2 resulting in more surface oxygen vacancies, basic sites, and abundant mesopores. In-situ DRIFTS analysis confirmed the CO2 methanation follows the intermediate formate route, providing a new theoretical understanding for CO2 activation and methanation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Nanoscience & Nanotechnology
Yaxi Sun, Fan Ye, Jiajia Ding, Jinxia Li, Yun Guo, Li Wang, Yanglong Guo, Sheng Dai, Wangcheng Zhan
Summary: The study focuses on developing a highly efficient Ru-CeO2 catalyst for propane oxidation by adjusting the Ru loading to achieve a better balance between RuOx species in the CeO2 bulk and on the surface. By improving the distribution of active sites and increasing oxygen vacancies, the Ru-CeO2 catalyst shows enhanced catalytic activity and durability, making it a promising candidate for industrial applications.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Baijie Xu, Qian Xu, Quanzhong Wang, Zhen Liu, Ruikun Zhao, Dandan Li, Pengtao Ma, Jingping Wang, Jingyang Niu
Summary: The copper-containing polyoxometalate-based metal-organic framework HENU-7 showed excellent catalytic performance for the oxidation of diphenylmethane, with high conversion rate and selectivity to benzophenone. In addition, the material demonstrated stability for multiple reuses and the ability to catalyze the oxidation of different benzylic compounds.
INORGANIC CHEMISTRY
(2021)
Review
Chemistry, Physical
Yanli Fu, Xiaoqian Fu, Wen Song, Yanfei Li, Xuguang Li, Liangguo Yan
Summary: Layered double hydroxides (LDHs) are used as catalysts and adsorbents due to their stability, safety, and reusability. They have high anion exchange capacity, thermal stability, and a large specific surface area, enabling effective removal of heavy metal ions, inorganic anions, organic pollutants, and oil pollutants from wastewater. LDHs also serve as heterogeneous catalysts in various advanced oxidation processes, including the Fenton system and electrocatalytic system. Challenges and future trends of LDHs in wastewater treatment are discussed in this review.
Article
Environmental Sciences
Lin Niu, Xiaoli Zhao, Zhi Tang, Yaqi Cai, Qitao Lei, Deyi Hou, Hongyun Niu, Liangjie Wang, John P. Giesy, Fengchang Wu
Summary: A ternary micro-electrolysis system with Fe0/C@Cu0 catalysts was synthesized for the degradation of STZ. The catalysts demonstrated excellent reusability and stability. The Fe0/C3@Cu0 catalyst with tighter Fe-Cu connection and unique core-shell structure showed improved performance in STZ degradation. The synergistic effects between Fe0 and Cu0 accounted for the degradation mechanism.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Review
Engineering, Chemical
Guangxing Yang, Qiao Zhang, Hao Yu, Feng Peng
Summary: Direct ethanol fuel cells (DEFCs) have great potential for converting chemical energy to electricity, but slow kinetics of ethanol electrooxidation at the anode is a major obstacle to their application. Recently, ternary catalysts formed by adding other metals have significantly improved electroactivity and stability.
Article
Engineering, Chemical
W. Kamal, Rehab Mahmoud, Abeer Enaiet Allah, Abdalla Abdelwahab, Mohamed Taha, Ahmed A. Farghali
Summary: This study aims to investigate the adsorption mechanisms of the pharmaceutical pollutant oxytetracycline (OTC) on a fabricated catalyst Zn/Co/Fe LDH. The results show that Zn/Co/Fe LDH exhibits a high adsorption capacity and removal percentage for OTC, reaching 100%. The waste material is used as an active catalyst, supporting methanol oxidation with high stability in a basic medium.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Riza Ariyani Nur Khasanah, Hui-Ching Lin, Hsiang-Yun Ho, Yen-Ping Peng, Tsong-Shin Lim, Hsi-Lien Hsiao, Chang-Ren Wang, Min-Chieh Chuang, Forest Shih-Sen Chien
Summary: Cu2O is a promising material for photocatalysis due to its absorption ability in the UV-visible light range, functioning as a photocathode when deposited on conductive Ti and FTO substrates, and as a photoanode when deposited on n-type semiconductors like TiO2 nanotube arrays. The photocatalytic properties of Cu2O heterojunctions on different substrates were systematically studied, showing that Cu2O/TNA/Ti exhibited higher photocurrent spectral responses compared to Cu2O/Ti and Cu2O/FTO photocathodes. The enhancement of photocatalytic activity in Cu2O/TNA/Ti was attributed to its UV-visible light absorption capabilities.
Article
Engineering, Chemical
Da Ke, Minjia Wang, Jiancheng Ruan, Xinzhi Chen, Shaodong Zhou
Summary: Continuous preparation of pyromellitic dianhydride (PMDA) from durene was studied using a fixed-bed reactor. The reaction was performed with a phosphorus-vanadium-titanium ternary catalyst, resulting in high selectivity and yield of PMDA. In-situ characterization combined with theoretical calculation was used to uncover the reaction mechanisms, and the significant doping effect was discussed.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Applied
Xinxin Dong, Yang Liu, Shuchao Cheng, Haonan Zhou, Wenjie Zhang, Baosheng Jin
Summary: Until now, almost 50% of the world's hydrogen production at industrial level is realized by methane steam reforming (SMR). Traditional high steam to carbon ratio (S/C = 2.5-3.0) leads to high energy input and gas dilution, while a low S/C ratio (<1.0) raises the bar for catalyst anti-coking ability. This study presents a new approach of using molten salt with ball milling pretreatment to prepare Ni-Sn-Al ternary oxide, which demonstrates high catalytic activity and coke resistance.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Nutrition & Dietetics
Shougo Tsujino, Naohisa Nosaka, Shohei Sadamitsu, Kazuhiko Kato
Summary: This study aimed to investigate the effects of daily ingestion of 2 grams of MCTs for 2 weeks on fat burning during physical activities in sedentary individuals. The results showed that MCT ingestion significantly increased fat oxidation and decreased respiratory exchange ratio during exercise.
Article
Environmental Sciences
Chao Zhong, Jinke Gong, Shaoli Wang, Jiqiu Tan, Junan Liu, Yun Zhu, Guohai Jia
Summary: Different types of diesel particulate filters have varying effects on NO2 catalytic formation, consumption, and efflux, with CCDPF performing the best in hot-start and high-speed cycles.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Electrochemistry
Mohamad Fahrul Radzi Hanifah, Juhana Jaafar, Mohd Hafiz Dzarfan Othman, Ahmad Fauzi Ismail, Mukhlis A. Rahman, Norhaniza Yusof, Farhana Aziz, Wan Norharyati Wan Salleh, Hamid Ilbeygi
Summary: The development of low-loading precious platinum (Pt) metal electrocatalysts by alloying with less expensive earth-abundant transition metals has gained attention for its high electrocatalytic activity and durability performance in the methanol oxidation reaction (MOR) of direct methanol fuel cells (DMFC). In this study, ternary nanocomposite electrocatalysts with controllable composition of bimetallic Pt-Pd alloy nanoparticles (NPs) were synthesized through a simple one-step hydrothermal-assisted formic acid reduction reaction. The impact of the bimetallic Pt-x-Pd-y alloy atomic ratio on the electrocatalytic performance of MOR was evaluated, and it was found that the composition of the alloy NPs can be easily adjusted to enhance the electrocatalytic activity and stability. The ternary nanocomposite electrocatalyst with a Pt-Pd atomic ratio of 2:3 exhibited the highest peak current density of 39.83 mA cm(-2), demonstrating its potential as an anode electrocatalyst in DMFC application.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Multidisciplinary
S. El-khalafy, S. El-din Etaiw, M. Hassanein
Summary: The metal organic framework MOF1-bicarbonate system was investigated as an efficient catalyst for the aerobic oxidation of 2,6-di-tert-butylphenol. The catalytic system showed excellent performance in selectively oxidizing 2,6-di-tert-butylphenol to 3,3',5,5'-tetra-tert-butyl-4,4'-diphenoquinone, with the hydroxyl radicals identified as the main active oxidation radicals. The recycled catalytic system retained its activity for multiple runs.
JOURNAL OF SAUDI CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Jun Liu, Youjun Yan, Meng Lian, Jimei Song, Yongqi Yang, Guofu Huang, Miao Wang, Xinzhen Feng, Weijie Ji
Summary: Based on precise phase control V species adjustment, a series of metal oxides were selected as modification agents to enhance the catalytic activity and durability of VPO-TiO2-based catalysts for producing acrylic acid. The addition of Nb2O5 improved the catalyst efficiency by enhancing prereduction of V5+ species and increasing active site density, leading to high selectivity and formation rate. The characterization results confirmed the effectiveness of Nb2O5 in enhancing the VPO-TiO2 catalyst.
Article
Engineering, Chemical
Rami S. Arafah, Antonio E. Riberio, Alirio E. Rodrigues, Luis S. Pais
Summary: This study successfully separated multiple stereoisomers of nadolol using high pH reversed-phase fixed-bed and simulated moving bed preparative chromatographic techniques, and transformed them into two high-purity stereoisomers. The feasibility of this method was validated through experimental results.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Environmental Sciences
Caroline Maria Bezerra de Araujo, Gessica Wernke, Marcos Gomes Ghislandi, Alexandre Diorio, Marcelo Fernandes Vieira, Rosangela Bergamasco, Mauricio Alves da Motta Sobrinho, Alirio Egidio Rodrigues
Summary: This study demonstrates that the agar-graphene oxide (A-GO) hydrogel is a viable and eco-friendly alternative for the selective removal of chloroquine diphosphate and the cationic dye Safranin-O from water.
ENVIRONMENTAL RESEARCH
(2023)
Article
Thermodynamics
Alirio E. Rodrigues
Summary: In this article, the author reviews their work in the field of adsorption, summarizing their findings and suggesting a roadmap for future development. The author emphasizes the importance of understanding batch and continuous adsorption processes, as well as the prediction of adsorption equilibrium and the screening of adsorbents. They also discuss the challenges and opportunities associated with difficult separations and material choices, and highlight the significance of hybrid and data-driven modeling.
FLUID PHASE EQUILIBRIA
(2023)
Article
Engineering, Chemical
Lucas F. A. S. Zafanelli, Ezzeldin Aly, Alirio E. Rodrigues, Jose A. C. Silva
Summary: In this study, a fixed-bed adsorption apparatus was developed to investigate the adsorption breakthrough curve of green hydrogen blended in natural gas grids at cryogenic temperatures and high pressures. The results showed that the novel apparatus is a reliable tool for screening adsorbents and studying the dynamic separation of green hydrogen from natural gas.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Rafael O. M. Dias, Idelfonso B. R. Nogueira, Alexandre F. P. Ferreira, Alirio E. Rodrigues, Ana M. M. Ribeiro
Summary: In a simulated moving bed (SMB), regeneration is achieved by using a desorbent and recovering it in downstream separations. The proper selection of an appropriate adsorbent/desorbent pair is crucial for the effectiveness of the SMB process. By developing a parameter called SMB performance indicator (SPI) using readily available literature data, the selection process can be fast and easily accomplished. This metric considers adsorption selectivity, adsorption capacity, and enthalpy ratio, and can determine the most suitable adsorbent/desorbent pair for a specific gas separation in SMB through simple calculations.
Article
Biochemistry & Molecular Biology
Ana Rita Pereira, Carina Costa, Nuno Mateus, Victor de Freitas, Alirio Rodrigues, Joana Oliveira
Summary: Large amounts of vine shoots generated during vine pruning still contain compounds from the original plant, including phenolic compounds and structural compounds like cellulose, hemicellulose, and lignin. This study proposes the extraction of lignin from vine shoots for the production of nanoparticles, using ethanol/toluene and water/ethanol as solvents. The lignin nanoparticles showed excellent antioxidant properties and the extracts from biomass pretreatment also exhibited antioxidant activity. Overall, this work contributes to the integral reuse of vine shoot byproduct, promoting sustainability.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Engineering, Chemical
Marcio A. F. Martins, Alirio E. Rodrigues, Jose M. Loureiro, Ana M. Ribeiro, Idelfonso B. R. Nogueira
Summary: This paper addresses the application of a robust model predictive control strategy to a pressure swing adsorption unit. Linear models are used to handle uncertainties and describe the nonlinear behavior of the unit. The control law incorporates a multi-model uncertainty description and a tracking scheme for steady states.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
William Q. Rios, Bruno Antunes, Alirio E. Rodrigues, Ines Portugal, Carlos M. Silva
Summary: Analytical equations for effectiveness factors of reversible reactions are developed and numerically validated in this study. These equations are expressed in terms of irreversible nth order Thiele modulus, thermodynamic equilibrium constant, ratios of effective diffusivities, and ratios of surface concentrations. The application of these equations is demonstrated for two liquid phase reactions catalyzed by Amberlyst-15.
Article
Food Science & Technology
Luana P. Queiroz, Carine M. Rebello, Erbet A. Costa, Vinicius V. Santana, Bruno C. L. Rodrigues, Alirio E. Rodrigues, Ana M. Ribeiro, Idelfonso B. R. Nogueira
Summary: This work proposes a novel framework based on scientific machine learning to tackle an emerging problem in flavor engineering and industry. By combining generative and reinforcement learning models, new flavor molecules are designed. The potential of the framework is validated by evaluating the synthesis accessibility, number of atoms, and likeness to natural or pseudo-natural products of the designed molecules.
Article
Chemistry, Multidisciplinary
Vinicius V. Santana, Marcio A. F. Martins, Jose M. Loureiro, Ana M. Ribeiro, Luana P. Queiroz, Carine M. Rebello, Alirio E. Rodrigues, Idelfonso B. R. Nogueira
Summary: Model-based optimization of SMBRs requires efficient solvers and significant computational power. Despite the applications of artificial neural networks (ANNs) in modeling SMB units, their usage in reactive SMBRs is limited. The evaluation of the representation capability of ANNs is an open issue, and the optimal assessment using surrogate models remains unresolved. The main contributions of this study are the optimization of SMBRs based on deep recurrent neural networks (DRNNs) and the characterization of feasible operation regions using metaheuristic techniques. The results show that DRNN-based optimization can effectively address complex optimization problems while achieving optimality.
Article
Chemistry, Multidisciplinary
Beatriz C. Silva, Carine Menezes Rebello, Aliirio E. Rodrigues, Ana M. Ribeiro, Alexandre F. P. Ferreira, Idelfonso B. R. Nogueira
Summary: This study proposes a novel strategy for the design of adsorption heat pumps, which involves simultaneous optimization and material screening using the particle swarm optimization (PSO) approach. The proposed framework effectively evaluates different adsorbents and temperature intervals to find the optimal solution in terms of maximum performance and minimum heat supply cost. This approach provides a fast and intuitive evaluation of multiple design and operation variables.
Article
Engineering, Chemical
Carina A. E. Costa, Filipa M. Casimiro, Carlos Vega-Aguilar, Alirio E. Rodrigues
Summary: In this study, solvent fractionation was used to obtain lignin fractions with a narrowed molecular weight and specific structural characteristics, improving its homogeneity and purity. The water-soluble fraction had more phenolic OH, less aliphatic OH groups, and less aryl-ether linkages, indicating higher condensation degree. On the other hand, the insoluble fraction from the 60% acetone mixture had the lowest molecular weight and highest inorganic material content. The fraction with the highest potential (IF 30:70) showed an increase of about 13% for vanillin and 19% for syringaldehyde after alkaline oxidation, suggesting its potential as a source of high added-value monomeric phenolic compounds.
Article
Engineering, Environmental
A. Catarina Faria, C. V. Miguel, Alexandre F. P. Ferreira, A. E. Rodrigues, Luis M. Madeira
Summary: In this study, nickel-substituted hydrotalcites promoted with cesium were synthesized and their dual-function ability as a high-temperature CO2 adsorbent and methanation catalyst was evaluated. It was found that materials impregnated using the direct impregnation method had a higher number of basic sites, which facilitated greater CO2 sorption. However, these materials exhibited lower selectivity towards methane, resulting in a higher CO formation. Therefore, materials prepared using the powder impregnation method were chosen for further investigation in a parametric study.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Julia C. Kessler, Vanessa Vieira, Isabel M. Martins, Yaidelin A. Manrique, Patricia Ferreira, Ricardo C. Calhelha, Andreia Afonso, Lillian Barros, Alirio E. Rodrigues, Madalena M. Dias
Summary: This study explores the potential of almond, hazelnut, and walnut extracts as food flavouring agents, suggesting a new added-value application for lower quality or excess production fruits. The extracts were characterized and evaluated, and almond extract was identified as the most promising ingredient to increase the sensory value of food products.
Article
Biochemistry & Molecular Biology
Ines F. Mota, Filipa Antunes, Joana F. Fangueiro, Carina A. E. Costa, Alirio E. Rodrigues, Manuela E. Pintado, Patricia S. Costa
Summary: Lignin has been investigated as a potential ingredient for cosmetics due to its UV protection, antioxidant, and antimicrobial properties. This study presents a simple method to obtain light-colored lignin from sugarcane bagasse and demonstrates its excellent antioxidant and emulsifying capabilities. The safety and stability of lignin in an oil-in-water emulsion are also confirmed.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(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)
