Article
Chemistry, Multidisciplinary
Shuai Chang, Wei Na, Jiaqi Zhang, Lina Lin, Wengui Gao
Summary: In this study, a series of Cu/ZnO-CeO2 catalysts with different CeO2 content were prepared, and the Cu/ZnO-CeO2 catalyst with 30% CeO2 showed the best catalytic activity for the hydrogenation of CO2 to methanol at 280 degrees C in a 3 MPa CO2/H-2 (1/3) atmosphere, achieving a CO2 conversion rate of 15.6% and a methanol yield of 10.06%. The catalyst demonstrated good activation of H-2 and CO2 due to the dispersed CuO species and oxygen vacancies, and the presence of a large number of intermediate species on the catalyst surface greatly contributed to its catalytic performance.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Physical
Calvin R. Thomas, Josh A. Pihl, Vitaly Y. Prikhodko, Michelle K. Kidder, Jochen A. Lauterbach, Todd J. Toops
Summary: The study found that a suitable amount of ceria in the Pd/CeOx/Al2O3 catalyst was beneficial for promoting essential reactions, while excess ceria had a negative impact on oxygen storage capacity. Additionally, potential reaction pathways for ammonia production were determined by the research.
CATALYSIS COMMUNICATIONS
(2021)
Article
Green & Sustainable Science & Technology
Consuelo Alvarez-Galvan, Jose Luis Martinez, Maricarmen Capel-Sanchez, Laura Pascual, Jose Antonio Alonso
Summary: Ni-loading on Ce0.9La0.1O1.95-supported Ni catalysts for CO2 reduction with hydrogen was investigated. Samples prepared by solution combustion synthesis showed high thermal resistance, purity, and crystallinity, with Ni nanoparticles exhibiting superparamagnetism. The catalysts displayed high reaction rates and the presence of oxygen vacancies and increased Ce3+ content in spent catalysts compared to fresh ones was confirmed.
ADVANCED SUSTAINABLE SYSTEMS
(2021)
Article
Energy & Fuels
Yunxiang Tang, Simeng Wu, Yanxiang Wang, Lixiang Song, Zhengyi Yang, Chan Guo, Jiurong Liu, Fenglong Wang
Summary: In this study, highly efficient catalysts consisting of Rh nanoparticles supported on TiO2 nanosheets were synthesized for photo-assisted catalytic CO2 hydrogenation. The catalyst achieved a high CO production rate of 20.6 mmol gcat-1 h-1 (5.15 mol gRh-1 h-1) with nearly 100% selectivity and excellent stability under light irradiation at 250 degrees C, outperforming most reported metal-based catalysts. The integration of solar and thermal energy for an efficient reverse water-gas shift (RWGS) reaction under mild conditions is demonstrated.
Article
Chemistry, Multidisciplinary
Erwei Huang, Ning Rui, Rina Rosales, Ping Liu, Jose A. Rodriguez
Summary: Enzymatic systems have been found to catalytically convert methane at room temperature under mild conditions. This study demonstrates that the reforming of methane by water and the water-gas shift reaction can be achieved on ZrO2/Cu(111) catalysts near room temperature. The superior performance of the catalyst is attributed to a unique zirconia-copper interface, where multifunctional sites involving zirconium, oxygen, and copper work together to dissociate methane and water, facilitating the desired reactions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Deshetti Jampaiah, Devaiah Damma, Perla Venkataswamy, Anastasios Chalkidis, Hamidreza Arandiyan, Benjaram M. Reddy
Summary: The water-gas shift (WGS) reaction is crucial for producing hydrogen and renewable energy in modern technologies. Catalysts, such as Cu/CeO2, play a vital role in achieving high CO conversion and hydrogen generation activity in the WGS reaction. This study investigates the influence of CuCe-MOF templated approach on the WGS activity of Cu/CeO2 catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Ningqiang Zhang, Shinta Miyazaki, Yucheng Qian, Yuan Jing, Takashi Toyao, Ken-ichi Shimizu
Summary: Kinetic analyses of Ce4+ <-> Ce3+ redox and CO2/H-2 formation for the unsteady-state water-gas shift (WGS) reaction are carried out on Cu/CeO2 catalysts under periodic CO <-> H2O feeds at 350 degrees C. The results provide quantitative evidence of the redox-based mechanism of the reaction and suggest that Ce3+- reoxidation by H2O has a lower barrier than Ce4+-O reduction. The number of interfacial sites between CeO2 and Cu species affects the turnover frequencies for the redox reaction and CO2/H-2 formation. An associative redox mechanism based on the redox reaction between Cu2+-OH and Ce4+-OH/Ce4+ and Cu+--Ce3+ is proposed as the main catalytic cycle of the reaction.
Article
Chemistry, Multidisciplinary
Georgios Varvoutis, Maria Lykaki, Eleni Papista, Sonia A. C. Carabineiro, Antonios C. Psarras, Georgios E. Marnellos, Michalis Konsolakis
Summary: The effect of cesium doping on CuO/CeO2 catalysts under CO2 hydrogenation conditions was investigated. Results showed that a low amount of cesium improved CO selectivity but inhibited CO2 conversion. Specifically, doping with 2 cesium atoms per nm(2) at 430 degrees Celsius led to over 96% CO selectivity and equilibrium CO2 conversion.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Engineering, Environmental
Yiqing Zeng, Kok-Giap Haw, Zhigang Wang, Yanan Wang, Shule Zhang, Plaifa Hongmanorom, Qin Zhong, Sibudjing Kawi
Summary: A novel double redox method was developed to synthesize highly active CuO-CeO2 (CuCe-DR) catalyst, which exhibits higher Ce3+ and Cu2+ ion concentrations and stronger Cu-Ce interaction compared to CuCe-C catalyst. CuCe-DR catalyst shows higher toluene oxidation performance and stability at low temperatures, attributed to the increased surface chemisorbed oxygen and improved redox properties.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Mo Li, Thi Ha My Pham, Youngdon Ko, Kun Zhao, Liping Zhong, Wen Luo, Andreas Zutte
Summary: This study reports the application of Cu-In bimetallic catalysts for the reverse water gas shift (RWGS) reaction and reveals the influence of the support on their activity. On the ZrO2 support, Cu and In form Cu-In alloys and promote CO2 activation through partially reduced In2O3 with oxygen vacancies, while on the CeO2 support, Cu and In exist as metallic Cu and In2O3, respectively. The introduction of In hinders the dispersion of Cu and the formation of oxygen vacancies on CeO2, leading to decreased activity.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Engineering, Chemical
Lixuan Ma, Baojun Wang, Maohong Fan, Lixia Ling, Riguang Zhang
Summary: Inspired by the sensitivity of methanol and WGSR to Cu active site types, a specific defect type of Cu active site is proposed to facilitate methanol synthesis and effectively suppress WGSR to produce CO2. DFT calculations were used to investigate the detailed mechanism of syngas-to-methanol and WGSR over Cu catalysts. It was found that the adsorption and dissociation ability of H2O over different Cu active sites can be tuned to regulate WGSR and decrease CO2 selectivity. The relationship between GCN value, d-band center of active center, and the activity of methanol and WGSR was proposed to screen high-performance catalysts. This study provides a theoretical basis for designing and optimizing Cu-based catalysts to suppress WGSR and lower CO2 selectivity by adjusting Cu active sites to specific defect types.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Physical
Devaiah Damma, Aaron Welton, Punit Boolchand, Junhang Dong, Panagiotis G. Smirniotis
Summary: FeCeCoOx ferrite exhibited the best HT-WGS activity among the Ce and Cr/Co co-doped iron oxide, showing stable performance and suppression of coke formation during the reaction. Co-doping of Cr or Co into the iron oxide lattice enhanced the stability of the active magnetite phase, resulting in a high fraction of nanoparticles in the catalysts. The surface structure of the ternary spinel ferrites remained unchanged even after the reaction, contributing to the stable activity of the catalysts.
JOURNAL OF CATALYSIS
(2022)
Review
Engineering, Environmental
Yeol-Lim Lee, Kyoung-Jin Kim, Ga-Ram Hong, Hyun-Seog Roh
Summary: This review focuses on the reaction conditions and catalysts for water-gas shift reaction (WGSR) in various feed gases, including natural gas, biomass, municipal solid waste, and coal-derived synthesis gas. The performance of catalysts, including capacity, temperature, feed gas composition, and steam-to-carbon ratio, are compared to understand the development progress. The insights from this study provide valuable information for target-oriented WGSR in different feed gases.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Hui Zhou, Dong Wang, Xue-Qing Gong
Summary: By performing density functional theory calculations, it was found that the composite catalysts of inverse CeOx/Cu(111) can produce more active hydride species compared to CeO2 or Cu alone. This is mainly due to the efficient combination of the unique structural feature of CeOx islands and the electronic promotion from Cu. Additionally, modifying the Cu(111) surface with pyridine molecules can enhance the thermo- and dynamical stabilities of the hydride species.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Paola Riani, Elena Spennati, Maria Villa Garcia, Vicente Sanchez Escribano, Guido Busca, Gabriella Garbarino
Summary: Samples of NiO on silica and alumina doped with silica were prepared and characterized. The SiO2 support showed low Ni dispersion ability, producing segregated NiO particles and dispersed Ni2+ in exchange sites, while the Si-doped alumina formed a surface spinel monolayer phase, leading to the formation of NiO. H2-TPR results indicated that NiO particles are more easily reduced than Ni species. Low loading Ni/SiO2 catalysts showed high selectivity and moderate activity for RWGS reaction, while high loading Ni/SiO2 catalysts showed both methanation and RWGS with short-term deactivation for methanation. Ni on alumina-rich carriers exhibited high activity and selectivity for methanation, attributed to small nickel clusters or metal particles interacting with alumina.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Moom Sinn Aw, Milena Zorko, Petar Djinovic, Albin Pintar
APPLIED CATALYSIS B-ENVIRONMENTAL
(2015)
Article
Chemistry, Physical
Maxim Zabilskiy, Petar Djinovic, Bostjan Erjavec, Goran Drazic, Albin Pintar
APPLIED CATALYSIS B-ENVIRONMENTAL
(2015)
Article
Materials Science, Multidisciplinary
Muhammad Shahid Arshad, Spela Trafela, Kristina Zuzek Rozman, Janez Kovac, Petar Djinovic, Albin Pintar
JOURNAL OF MATERIALS CHEMISTRY C
(2017)
Article
Chemistry, Physical
Nina Drasinac Pajic, Petar Djinovic, Goran Drazic, Joze Grdadolnik, Primoz Sket, Janez Cerkovnik, Albin Pintar
APPLIED CATALYSIS A-GENERAL
(2018)
Article
Chemistry, Physical
Janvit Terzan, Petar Djinovic, Janez Zavasnik, Iztok Arcon, Gregor Zerjav, Matjaz Spreitzer, Albin Pintar
APPLIED CATALYSIS B-ENVIRONMENTAL
(2018)
Article
Chemistry, Applied
Gregor Zerjav, Petar Djinovic, Albin Pintar
Article
Chemistry, Physical
Petar Djinovic, Ilja Gasan Osojnik Crnivec, Bostjan Erjavec, Albin Pintar
Article
Engineering, Environmental
Maxim Zabilskiy, Bostjan Erjavec, Petar Djinovic, Albin Pintar
CHEMICAL ENGINEERING JOURNAL
(2014)
Article
Chemistry, Physical
Moom Sinn Aw, Ilja Gasan Osojnik Crnivec, Petar Djinovic, Albin Pintar
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2014)
Article
Chemistry, Physical
Petar Djinovic, Alenka Ristic, Tadej Zumbar, Venkata D. B. C. Dasireddy, Mojca Rangus, Goran Drazic, Margarita Popova, Blaz Likozar, Natasa Zabukovec Logar, Natasa Novak Tusar
APPLIED CATALYSIS B-ENVIRONMENTAL
(2020)
Article
Chemistry, Physical
Petar Djinovic, Janez Zavasnik, Janvit Terzan, Ivan Jerman
Summary: CeO2 lattice oxygen favors complete oxidation of propane, while CeO2 supported on activated carbon exhibits different reduction and re-oxidation characteristics during reaction with propane. The catalytic activity of CeVO4/AC catalysts requires a 1-2 nm amorphous CeVO4 layer.
Article
Multidisciplinary Sciences
Kristijan Lorber, Petar Djinovic
Summary: The article discusses the feasibility of photo-thermal reduction of carbon dioxide and showcases the role of transition metal nanoparticles on suitable catalysts. Future research directions are also provided.
Article
Nanoscience & Nanotechnology
Kristijan Lorber, Janez Zavasnik, Iztok Arcon, Matej Hus, Janvit Terzan, Blaz Likozar, Petar Djinovic
Summary: The study found that the different morphologies of CeO2 can influence the activation ability of carbon dioxide during methane dry reforming. CeO2 cubes facilitate the formation of polydentate carbonate species, while CeO2 nanorods and nanospheres favor the formation of mono- and bidentate carbonate species. This plays an important role in product selectivity and surface sites in methane dry reforming reaction.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Tadej Zumbar, Iztok Arccon, Petar Djinovic, Giuliana Aquilanti, Gregor Zerjav, Albin Pintar, Alenka Risticc, Goran Drazic, Janez Volavsek, Gregor Mali, Margarita Popova, Natassa Zabukovec Logar, Natasa Novak Tusar
Summary: By studying a bimetal CuFe-gamma-alumina catalyst, researchers have achieved catalytic activity in the total oxidation of toluene, a model VOC, at lower temperatures. They have also gained a deeper understanding of the catalyst and the reaction mechanism through advanced microscopic and spectroscopic characterizations. The optimal abundance of Cu-O-Al and Fe-O-Al species in the catalysts leads to synergistic catalytic activity, and the attachment of CuO6 octahedra to specific Al atoms affects the catalyst's activity. The oxidation of toluene occurs via the Langmuir-Hinshelwood mechanism. This research introduces a potential family of low-cost and scalable oxidation catalysts with superior efficiency at lower temperatures.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Chemistry, Physical
Janvit Terzan, Matej Hus, Blaz Likozar, Petar Djinovic
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)
