Article
Chemistry, Physical
Miren Agote-Aran, Martin Elsener, Frank W. Schuetze, Christian M. Schilling, Manasa Sridhar, Evangelos Katsaounis, Oliver Kroecher, Davide Ferri
Summary: Understanding the poisoning mechanism in Diesel oxidation catalysts is crucial in preventing long term catalyst deterioration in vehicles. Both impregnation and spraying methods of artificial phosphorus poisoning were studied on a commercial DOC, with spraying resulting in more detrimental poison distribution and decreased NO oxidation performance compared to impregnation. Sequential treatments were conducted to gain deeper insight into the catalyst deactivation mechanism.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Natalia Diaz Montenegro, William S. Epling
Summary: The methane oxidation and oxygen storage capacity of a bilayer Pt/Pd/Al2O3 over a Mn0.5Fe2.5O4 spinel catalyst under periodic conditions were studied before and after SO2 exposure. Improvement in CH4 oxidation conversion was observed under periodic conditions compared to steady-state conditions before sulfur exposure. After sulfur exposure, a loss in CH4 oxidation performance and oxygen storage capacity of the spinel material was observed, but regeneration methods under periodic conditions led to improved CH4 conversion.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Yuhan Wang, Cristina Stere, Geoffrey McCullough, Mingyang Li, Alexandre Goguet
Summary: A spatially resolved technique was used to investigate the impact of deactivation on the spatial distribution of the effective diffusion in an aged washcoated monolith catalyst. The dominant diffusion regimes in the substrate and the washcoat were determined to be molecular and Knudsen respectively in the zone affected by deactivation. The results provide valuable insights for the simulation of aged catalysts and can lead to more accurate predictions of vehicle emissions.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Applied
Miren Agote-Aran, Vilde V. Jacobsen, Martin Elsener, Frank W. Schuetze, Christian M. Schilling, Manasa Sridhar, Evangelos Katsaounis, Oliver Kroecher, Ivo Alxneit, Davide Ferri
Summary: The tightening emission regulations have driven the development of commercial DOCs with zoned or layered formulations to meet diverse functionalities. However, the aging phenomena in such complex formulations are not well understood. This study compares the deactivation processes of two layers in DOC monoliths, providing insights into the rationalization of aging in layered catalyst formulations.
TOPICS IN CATALYSIS
(2023)
Article
Chemistry, Physical
Bin Di, Zhantao Peng, Zhongyi Wu, Xiong Zhou, Kai Wu
Summary: The study explores the charge transfer between single atoms and their supports in several model systems. It found that Cs transfers more electrons than K, while gold and bromine atoms draw electrons from supports.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Engineering, Environmental
Phuoc Hoang Ho, Jieling Shao, Dawei Yao, Wei Di, Derek Creaser, Louise Olsson
Summary: Phosphorus poisoning is a major cause of deactivation in diesel oxidation catalysts, affecting the catalytic performance for CO, C3H6, C3H8, and NO oxidation. The impact of phosphorus depends on the type of active phase and support material used. Phosphorus loading had a greater influence on zeolite-based catalysts, leading to the formation of phosphorus oxides that blocked the catalyst surface, while in alumina-based catalysts, phosphorus mainly reacted with the support, deactivating only a part of the active noble metals.
CHEMICAL ENGINEERING JOURNAL
(2023)
Editorial Material
Biochemical Research Methods
Rita Strack
Summary: Combining in situ tagmentation and transcription with MERFISH allows for spatial profiling of the epigenome in tissues at single-cell resolution.
Article
Energy & Fuels
Dara Khairunnisa Binte Mohamed, Andrei Veksha, Quan Luu Manh Ha, Wei Ping Chan, Teik-Thye Lim, Grzegorz Lisak
Summary: This review examines the recent findings on the poisoning effects of syngas impurities on nickel catalysts and the development of poison tolerant catalysts. It discusses the source and content of impurities from different feedstock gasification. The limitations of current catalytic tar reforming processes and promising approaches for future works are also discussed.
Article
Chemistry, Multidisciplinary
Johannes Schust, Florian Mangold, Florian Sterl, Niklas Metz, Thorsten Schumacher, Markus Lippitz, Mario Hentschel, Harald Giessen
Summary: Nonlinear optical plasmonics investigates the emission of plasmonic nanoantennas using nonlinear spectroscopy. The study introduces nonlinear spatially resolved spectroscopy (NSRS), which can image the k-space and spatially resolve the THG signal of gold nanoantennas. The research demonstrates the ability to image various oscillation modes inside the nanostructures and determine spatial emission hotspots. The NSRS setup enables the investigation of a nonlinear self-enhancement process of nanoantennas under critical laser excitation.
Editorial Material
Biochemical Research Methods
Lei Tang
Summary: Slide-DNA-seq enables spatial analysis of mutations and clonal populations in intact tumor samples.
Article
Engineering, Environmental
Phuoc Hoang Ho, Jieling Shao, Dawei Yao, Rojin Feizie Ilmasani, Muhammad Abdus Salam, Derek Creaser, Louise Olsson
Summary: This study investigates the effect of the Pt/Pd ratio on the oxidation activity and sulfur resistance of diesel oxidation catalysts (DOC). The formation of Pt-Pd alloy enhances the sintering resistance of Pt and retains a high fraction of Pd. The Pt-Pd alloy also improves the oxidation resistance and enhances the activity of the catalysts for CO and C3H6 oxidation. Bimetallic catalysts show lower temperatures for NO reduction but lower absolute conversion of NO due to the decrease in Pt active sites. Moreover, bimetallic catalysts exhibit significantly improved sulfur resistance compared to monometallic Pd catalysts.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Applied
Melanie J. Hazlett, William S. Epling
Summary: The effects of water on CO and C3H6 oxidation varied for different Pt, Pd, and Pt-Pd catalysts, influencing light-off temperatures and selectivity towards certain partial oxidation products. Water generally improved CO oxidation light-off for Pd and Pt-Pd catalysts, but had a negative impact on Pt catalysts. In terms of C3H6 oxidation, water had a negative impact on Pd catalysts and a positive effect on Pt catalysts, with Pt-Pd catalysts exhibiting intermediate behavior. Overall, the addition of water did not greatly affect the selectivity towards certain partial oxidation products in the reaction mixture.
Article
Polymer Science
David Reisinger, Alexander Hellmayr, Matthias Paris, Michael Haas, Thomas Griesser, Sandra Schloegl
Summary: The covalently cross-linked network structure of vitrimeric polymers can be reorganized through the thermoactivated exchange of covalent bonds. This study demonstrates the use of a photolatent transesterification catalyst to selectively rearrange the network topology in a thiol-ene polymer matrix. The spatially resolved catalyst activation allows for spatial control and reshaping of the 3D-printed polymer structure.
Review
Energy & Fuels
Qiuyu Shen, Zhihui Lu, Fukun Bi, Yuyin Fang, Linping Song, Yang Yang, Minghong Wu, Xiaodong Zhang
Summary: This paper reviews the research progress in the catalytic oxidation of VOCs in the simulated flue gas, focusing on the effects of different components of flue gas on the structure and activity of catalysts. The promotion and inhibition effects of water, SO2, NOx, Cl, CO2, and heavy metals in the actual industrial flue gas on the structure and performance of the catalyst are discussed. Methods to improve the antitoxicity of the catalyst are reviewed, and the challenges and prospects of antitoxicity catalysts for VOCs are proposed.
Article
Engineering, Environmental
Chih-Han Liu, Junjie Chen, Todd J. Toops, Jae-Soon Choi, Cyril Thomas, Michael J. Lance, Eleni A. Kyriakidou
Summary: Novel palladium(Pd)/SiO2(core)@Zr(shell) structured DOCs were developed with improved low-temperature activity and hydrothermal stability for diesel oxidation applications. The catalyst achieved 90% CO and total hydrocarbon conversion at temperatures of 178 and 372 degrees Celsius, respectively.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Saurabh Y. Joshi, Ashok Kumar, Jinyong Luo, Krishna Kamasamudram, Neal W. Currier, Aleksey Yezerets
APPLIED CATALYSIS B-ENVIRONMENTAL
(2015)
Article
Chemistry, Physical
Supriyanto, Kurnia Wijayanti, Ashok Kumar, Saurabh Joshi, Krishna Kamasamudram, Neal W. Currier, Aleksey Yezerets, Louise Olsson
APPLIED CATALYSIS B-ENVIRONMENTAL
(2015)
Article
Chemistry, Physical
Xavier Auvray, William Partridge, Jae-Soon Choi, Josh Pihl, Filipa Coehlo, Aleksey Yezerets, Krishna Kamasamudram, Neal Currier, Louise Olsson
APPLIED CATALYSIS B-ENVIRONMENTAL
(2015)
Article
Chemistry, Physical
Louise Olsson, Kurnia Wijayanti, Kirsten Leistner, Ashok Kumar, Saurabh Y. Joshi, Krishna Kamasamudram, Neal W. Currier, Aleksey Yezerets
APPLIED CATALYSIS B-ENVIRONMENTAL
(2015)
Article
Chemistry, Physical
Kurnia Wijayanti, Stanislava Andonova, Ashok Kumar, Junhui Li, Krishna Kamasamudram, Neal W. Currier, Aleksey Yezerets, Louise Olsson
APPLIED CATALYSIS B-ENVIRONMENTAL
(2015)
Article
Chemistry, Applied
Junhui Li, Ashok Kumar, Krishna Kamasamudram, Neal Currier, Aleksey Yezerets
Article
Chemistry, Applied
Kirsten Leistner, Oana Mihai, Kurnia Wijayanti, Ashok Kumar, Krishna Kamasamudram, Neal W. Currier, Aleksey Yezerets, Louise Olsson
Article
Chemistry, Physical
Louise Olsson, Kurnia Wijayanti, Kirsten Leistner, Ashok Kumar, Saurabh Y. Joshi, Krishna Kamasamudram, Neal W. Currier, Aleksey Yezerets
APPLIED CATALYSIS B-ENVIRONMENTAL
(2016)
Article
Chemistry, Physical
Chethan K. Gaddam, Randy L. Vander Wal, Xu Chen, Aleksey Yezerets, Krishna Kamasamudram
Article
Chemistry, Applied
Ashok Kumar, Michael A. Smith, Krishna Kamasamudram, Neal W. Currier, Aleksey Yezerets
Article
Chemistry, Applied
Jinyong Luo, Di Wang, Ashok Kumar, Junhui Li, Krishna Kamasamudram, Neal Currier, Aleksey Yezerets
Article
Chemistry, Physical
Kurnia Wijayanti, Kirsten Leistner, Shilpa Chand, Ashok Kumar, Krishna Kamasamudram, Neal W. Currier, Aleksey Yezerets, Louise Olsson
CATALYSIS SCIENCE & TECHNOLOGY
(2016)
Article
Chemistry, Physical
Jinyong Luo, Feng Gao, Krishna Kamasamudram, Neal Currier, Charles H. F. Peden, Aleksey Yezerets
JOURNAL OF CATALYSIS
(2017)
Article
Chemistry, Physical
Jian Gong, Di Wang, Junhui Li, Neal Currier, Aleksey Yezerets
APPLIED CATALYSIS B-ENVIRONMENTAL
(2017)
Article
Transportation Science & Technology
Junhui Li, Neal Currier, Aleksey Yezerets, Hai-Ying Chen, Howard Hess, Shadab Mulla
SAE INTERNATIONAL JOURNAL OF ENGINES
(2016)
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)