Article
Energy & Fuels
Felix C. P. Leach, Martin Davy, Barbara Terry
Summary: The study shows that CeO2 as a fuel-borne catalyst can reduce emissions and improve combustion efficiency. CeO2 significantly reduces soot and THC emissions at low load, but not as much at high load. A minor reduction in NOx emissions is observed at high load, with no significant difference in fuel consumption.
Article
Engineering, Environmental
Gontzal Lezcano, Natalia Realpe, Shekhar R. Kulkarni, Salvador Sayas, Jose Cerrillo, Natalia Morlanes, Hend O. Mohamed, Vijay K. Velisoju, Ragad F. Aldilajan, Sai P. Katikaneni, Mohammad Rakib, Bandar Solami, Jorge Gascon, Pedro Castano
Summary: Ammonia decomposition is an attractive process for decarbonized hydrogen production. Alkalis are known to promote the reaction. This study evaluates the kinetic contribution of Ba as a promoter in Co-Ce catalysts and investigates its influence on the elementary steps of ammonia decomposition using a microkinetic approach.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Sabrina Christina Hebert, Klaus Stoewe
Summary: The influence of contact mode between soot and catalyst was investigated, and a continuous transition from loose to tight contact mode with increasing rotation speed was observed. The automated contact mode showed better reproducibility compared to manual contact modes.
Article
Energy & Fuels
Jiangjun Wei, Chenyang Fan, Yuan Zhuang, Zheng Fu, Ze Guan, Haizhao Li, Deliang Li, Yejian Qian
Summary: The mechanism of soot catalytical oxidation was investigated through various experiments, including temperature-programmed-oxidation (TPO), X-ray photoelectron spectroscopy, Fourier Transform Infrared Spectrometer, and Raman scattering spectrometer. It was found that ceria catalyst enhances the consumption of amorphous carbon and improves the structure and composition of soot surface, facilitating the oxidation reactions.
Article
Materials Science, Ceramics
Xiaoxiang Feng, Paul J. McGinn
Summary: Efforts to create a structured glass catalyst coating for use in diesel particulate filters are described. Various methods were investigated to increase the active surface area of a K-Ca-Si-O glass catalyst coating. The addition of polypropylene glycol was successful in creating a microporous coating that resulted in higher catalyzed surface area and more intensive soot-catalyst interaction.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Viktor Johanek, Petr Svenda, Karel Masek
Summary: Methanol oxidation catalyzed by bi-layered or mixed oxides of cobalt and cerium was studied using temperature-programmed reaction technique at atmospheric pressure. The results showed that the CeO2/CoOx configuration was more active and stable than CoOx alone, demonstrating a synergistic interaction between cerium and cobalt in the mixed oxide catalyst. Further optimization of reactivity can be achieved through control of adlayer coverage.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Vitalii Uvarov, Jozef Krutel, Karel Masek, Josef Myslivecek, Viktor Johanek
Summary: The thermal stability of Co3O4 and CeOx-Co3O4 thin films prepared by various dry physical techniques was studied. It was found that the well-ordered model system exhibited higher thermal stability compared to high surface area oxides. The cerium adlayer can serve as a stabilizing component, protecting cobalt oxide from reduction and decomposition in applications using Co3O4.
APPLIED SURFACE SCIENCE
(2022)
Article
Energy & Fuels
Andrea Pacino, Corrado La Porta, Antonino La Rocca, Alasdair Cairns
Summary: This study investigated the impact of a helicoidally shaped copper duct on the combustion characteristics and particulate emissions of a 2.2 L Direct Injection High Pressure Common Rail (DI HPCR) diesel engine. The copper duct, powered at 12.5 V by magnetic coils, was installed on the fuel line before the high-pressure pump. The results showed a 28% reduction in soot emissions when the device was connected to the fuel line, primarily due to a copper-mediated oxidizing effect. A comparison study with a Teflon duct revealed that the magnetic field has no significant effect on combustion and emission characteristics if no metal is leached into the fuel.
Article
Chemistry, Physical
Ryan Alcala, Andrew DeLaRiva, Eric J. Peterson, Angelica Benavidez, Carlos E. Garcia-Vargas, Dong Jiang, Xavier Isidro Pereira-Hernandez, Hidde H. Brongersma, Rik ter Veen, Jan Stanek, Jeffrey T. Miller, Yong Wang, Abhaya Datye
Summary: Metal dopants located on the surface of ceria are remarkably effective at stabilizing the surface area of ceria, by lowering the mobility of ceria.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Energy & Fuels
Chunmei Cao, Hua Yang, Jieyu Xiao, Xingchuan Yang, Baozeng Ren, Li Xu, Guoji Liu, Xingang Li
Summary: A series of potassium promoted transition metal oxide crossed nanosheets showed higher catalytic activity for soot oxidation, with KCo-NS performing the best. The interaction between potassium and transition metal oxides generated more oxygen vacancies and active oxygen species. Different catalysts displayed varying catalytic abilities under O-2/N-2 atmosphere or with the introduction of NO.
Article
Chemistry, Multidisciplinary
Hubert Ronduda, Magdalena Zybert, Wojciech Patkowski, Kamil Sobczak, Dariusz Moszynski, Aleksander Albrecht, Adam Sarnecki, Wioletta Rarog-Pilecka
Summary: This study reports cobalt catalysts supported on magnesium-lanthanum mixed oxide with different Co loading amounts synthesized via a simple wet impregnation method. It has been found that there is a clear relationship between the ammonia synthesis rate and the Co loading amount, with the synthesis rate increasing on increasing cobalt loading and reaching a maximum at 40 wt% Co deposition. Furthermore, the surface-specific activity (TOF) remains almost unchanged regardless of the Co loading amount in the catalysts.
Article
Chemistry, Multidisciplinary
T. Vinodkumar, J. K. Prashanth Kumar, Benjaram M. Reddy
Summary: The study investigates the effect of oxide supports on the structural and catalytic properties of europium ion-doped cerium oxide, aiming to enhance catalytic efficiency for oxidation reactions. Characterization studies showed that supported Ce0.8Eu0.2O2-δ mixed oxides exhibit improved catalytic activity compared to pure ceria and unsupported oxides towards soot and benzylamine oxidation reactions.
JOURNAL OF CHEMICAL SCIENCES
(2021)
Article
Materials Science, Ceramics
Chaoqian Ai, Yifan Du, Bolin Wen, Ronglu Shu, Liping Cao, Wei Wang
Summary: Mullite whiskers were prepared on the wall of cordierite honeycomb ceramics to form a hierarchical microstructure. Co/CZ@M/C sample exhibited good structural stability and stable catalytic performance, showing potential application in the diesel particulate filter field.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Environmental
Mengting Wang, Zhitao Han, Yubin Liu, Chuanqiu Gao, Xinxiang Pan, Song Zhou
Summary: A series of Ce1_xKxMO3 perovskite catalysts were synthesized by the citrate sol-gel method, in which the catalytic performance was significantly improved by substituting Ce with K. The Ce0.8K0.2CoO3 perovskite catalyst exhibited superior catalytic activity and increased specific surface area, with the formation of Co4+ and abundant oxygen vacancies, facilitating the activation of lattice oxygen species.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Energy & Fuels
N. A. Sacco, J. P. Bortolozzi, V. G. Milt, E. D. Banus
Summary: Mn-Ce catalysts synthesized using citric acid showed significant influence on physicochemical properties and catalytic activity in the catalytic combustion of diesel soot. Mixed oxides exhibited higher activities than individual ones, indicating a synergistic effect. The catalyst with Mn/(Mn + Ce) = 0.1 had the lowest temperature of the maximum combustion rate.
Article
Energy & Fuels
M. L. Pisarello, M. A. Maquirriain, C. A. Querini
Article
Chemistry, Physical
C. D. Lago, H. P. Decolatti, Lucas G. Tonutti, B. O. Dalla Costa, C. A. Querini
JOURNAL OF CATALYSIS
(2018)
Article
Chemistry, Applied
Maria Laura Pisarello, Maira Maquirriain, Paula Sacripanti Olalla, Valentina Rossi, Carlos A. Querini
FUEL PROCESSING TECHNOLOGY
(2018)
Article
Chemistry, Physical
Zanuttini M. Soledad, Gross Martin, Marchetti Gustavo, Querini Carlos
APPLIED CATALYSIS A-GENERAL
(2019)
Article
Chemistry, Applied
L. G. Tonutti, H. P. Decolatti, C. A. Querini, B. O. Dalla Costa
MICROPOROUS AND MESOPOROUS MATERIALS
(2020)
Article
Energy & Fuels
Maira Alejandra Maquirriain, Lucas Gabriel Tonutti, Carlos Alberto Querini, Maria Laura Pisarello
Summary: Crude glycerine is a product obtained in biodiesel production process, consisting of glycerine, water, salts, and non-glycerol organic matter. Due to variations in production processes, the composition of crude glycerine varies, making subsequent processing challenging. This study presents a method for quantifying impurities in crude glycerine and determines the confidence intervals for each impurity.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Engineering, Chemical
Maira Alejandra Maquirriain, Carlos Alberto Querini, Maria Laura Pisarello
Summary: The esterification of glycerine with free fatty acids using sulfuric, p-toluenesulfonic, and methanesulfonic acids as catalysts were studied, with methanesulfonic acid showing complete conversion with a yield of 95% at low concentration and temperature without darkening of the product.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2021)
Article
Engineering, Chemical
Maira Alejandra Maquirriain, Claudia A. Neyertz, Carlos Alberto Querini, Maria Laura Pisarello
Summary: This work investigates the process of removing saponifiable matter from industrial crude glycerine samples, finding that the addition of water is necessary for efficient impurity removal and the choice of extraction solvent as well as operational conditions are crucial factors. UV-Vis analysis is useful for tracking the purification process, while FTIR lacks sensitivity for monitoring the extraction directly on the glycerine sample.
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Applied
Barbara S. Sanchez, Claudia A. Neyertz, Maria S. Zanuttini, Carlos A. Querini, Gustavo Mendow
Summary: This paper proposes a combined process using Pd-Sn catalysts supported on an anion exchange resin to reduce nitrate content in groundwater. The results show that this catalyst is highly efficient, selective, and stable.
Article
Engineering, Environmental
L. G. Tonutti, B. O. Dalla Costa, H. P. Decolatti, G. Mendow, C. A. Querini
Summary: The esterification of glycerol with acetic acid to produce mono-, di-and triacetyl glycerol was studied over several acid mesoporous materials. The catalytic results were highly dependent on the structure, mainly due to the different acid sites density obtained with each support.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Applied
L. G. Tonutti, M. A. Maquirriain, C. A. Querini, B. O. Dalla Costa
Summary: This study aims to reduce the ripening time of catalysts prepared by co-condensation with sulfonic groups and develop a standard procedure for achieving high detemplation yield. The obtained materials showed high surface area, good degree of mesoscopic order, high degree of template removal, and preserved sulfonic groups in functionalized materials.
JOURNAL OF POROUS MATERIALS
(2023)
Article
Chemistry, Applied
Lucas G. Tonutti, Maira A. Maquirriain, Carlos A. Querini, Bruno O. Dalla Costa
Summary: The incorporation of La3+ cations in beta zeolite was studied to improve the selectivity and stability of the catalysts for alkylation reactions. Different amounts of La3+ led to different acid sites and reactions, with an optimal La/Al ratio favoring hydride transfer and cracking reactions, while avoiding polymerization and multiple alkylation. Higher La/Al ratios promoted polymerization, while lower ratios led to excessive cracking.
TOPICS IN CATALYSIS
(2022)
Article
Engineering, Chemical
F. A. Marchesini, G. Mendow, N. P. Picard, F. M. Zoppas, V. S. Aghemo, L. B. Gutierrez, C. A. Querini, E. E. Miro
INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING
(2019)
Article
Engineering, Environmental
G. Mendow, N. S. Veizaga, C. A. Querini, B. S. Sanchez
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2019)
Article
Engineering, Environmental
G. Mendow, A. Sanchez, C. Grosso, C. A. Querini
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2017)
Article
Chemistry, Physical
Bolun Yu, Denan Li, Qianqian Zhu, Shufan Yao, Lifeng Zhang, Yanshuo Li, Zhenxin Zhang
Summary: This study successfully improved the catalytic activity of a zeolitic octahedral metal oxide by incorporating a single zinc species into its micropore. The zinc incorporation achieved a high ethane conversion rate and ethylene selectivity. Mechanism study showed that the isolated zinc site played a crucial role in activating oxygen and ethane, as well as stabilizing intermediates and transition states.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Ruoqi Liu, Hao Fei, Jian Wang, Ting Guo, Fangyang Liu, Zhuangzhi Wu, Dezhi Wang
Summary: This work successfully synthesized a high-performing S-enriched MoS2 catalyst for electrocatalytic nitrogen reduction reaction (NRR), demonstrating high activity and selectivity. The synergistic effect of the 1T phase and bridging S22- species was shown to play a positive role in NRR performances, and DFT calculations revealed the mechanism behind the improved performance.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Pan Xia, Lele Zhao, Xi Chen, Zhihong Ye, Zhihong Zheng, Qiang He, Ignasi Sires
Summary: This study presents a modified gas-diffusion electrode (GDE) for highly efficient and stable H2O2 electrosynthesis by using trace polymethylhydrosiloxane (PMHS). DFT calculations provide an in-depth understanding of the roles of PMHS functional groups.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Kwangchol Ri, Songsik Pak, Dunyu Sun, Qiang Zhong, Shaogui Yang, Songil Sin, Leliang Wu, Yue Sun, Hui Cao, Chunxiao Han, Chenmin Xu, Yazi Liu, Huan He, Shiyin Li, Cheng Sun
Summary: Different B-doped rGO catalysts were synthesized and their 2e- oxygen reduction reaction (ORR) performance was investigated. It was found that the 2e- ORR selectivity of B-doped rGO was influenced by the B content and oxygen mass transfer conditions. The synthesized catalyst exhibited high 2e- ORR selectivity and was capable of degrading organic pollutants continuously.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Li Lv, Lin Lei, Qi-Wen Chen, Cheng-Li Yin, Huiqing Fan, Jian-Ping Zhou
Summary: Monoclinic phase La2Ti2O7 and orthorhombic phase Bi4Ti3O12 are widely used in photocatalysis due to their layered crystal structure. The electronic structures of these phases play a crucial role in their photocatalytic activity. Heat treatment in a nitrogen atmosphere introduces more oxygen vacancies into the S-scheme heterojunction, leading to enhanced NO removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Choe Earn Choong, Minhee Kim, Jun Sup Lim, Young June Hong, Geon Joon Lee, Keun Hwa Chae, In Wook Nah, Yeomin Yoon, Eun Ha Choi, Min Jang
Summary: In this study, the synergistic effect between argon-plasma-system (AP) and catalysts in promoting the production of reactive species for water remediation was investigated. By altering the oxygen vacancies concentration of CeO2/Bi2O3 catalyst, the production of hydrated electrons was stimulated for PFOA removal. The results showed that the built-in electric field in the Bi/Ce0.43 interface enhanced electron migration and eaq- generation, leading to improved PFOA removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yushan Wu, Di Xu, Yanfei Xu, Xin Tian, Mingyue Ding
Summary: Efficient synthesis of primary amines from carbonyl compounds was achieved via reductive amination using Ru@NC-Al2O3 as a catalyst, exhibiting high activity and selectivity under mild conditions.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yilan Jiang, Peifang Wang, Tingyue Chen, Keyi Gao, Yiran Xiong, Yin Lu, Dionysios D. Dionysiou, Dawei Wang
Summary: By controlling the content of Co and Ni in Co1-xNixFe2O4, the production of O-1(2) from H2O2 can be regulated. NiFe2O4, with the lowest lattice distortion degree, can efficiently produce O-1(2) as the dominant reactive oxygen species. The system also exhibits significant resistance to water matrix interference.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Shuai Feng, Donglian Li, Hao Dong, Song Xie, Yaping Miao, Xuming Zhang, Biao Gao, Paul K. Chu, Xiang Peng
Summary: In this study, MoO2/Mo2N heterostructures were prepared by regulating the coordination of Mo atoms. The electrocatalyst exhibits high current density and excellent stability for hydrogen evolution reaction.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Jia-Cheng E. Yang, Min -Ping Zhu, Daqin Guan, Baoling Yuan, Darren Delai Sun, Chenghua Sun, Ming-Lai Fu
Summary: This study successfully modulated the electron configuration and spin state of millimetric metal catalysts by adjusting the support curvature radius. The electronic structure-oriented spin catalysis was found to affect the degradation of pollutants, providing new insights for the design and production of highly active, reusable, and stable catalysts.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Tao Zhong, Su Tang, Wenbin Huang, Wei Liu, Huinan Zhao, Lingling Hu, Shuanghong Tian, Chun He
Summary: In this study, a highly efficient photocatalyst for the elimination of CH3SH was developed by engineering different crystal facets and coupling them with PHI. Cu (111)/PHI exhibited the highest elimination efficiency and showed good stability and reusability. The enhanced surface electron pump effect and effective adsorption mechanisms were revealed through comprehensive characterizations and DFT calculations.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Feifei Yang, Tianyu Zhang, Jiankang Zhao, Wei Zhou, Nicole J. Libretto, Jeffrey T. Miller
Summary: A Ni3Sn intermetallic nano particle was found to have geometrically isolated Ni sites that could selectively cleave C-O bonds in biomass derivatives. This nano particle showed high activity and selectivity towards 2-methylfuran, unlike Ni nanoparticles that produced other unwanted products derived from the aromatic rings.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Lulu Qiao, Di Liu, Anquan Zhu, Jinxian Feng, Pengfei Zhou, Chunfa Liu, Kar Wei Ng, Hui Pan
Summary: This study reveals that surface evolution plays a crucial role in enhancing the electrocatalytic performance of transition metal oxides for electrochemical nitrate reduction reaction (e-NO3RR). Incorporating nickel into Co3O4 can promote surface reconstruction and improve the adsorption of intermediates and reduce energy barriers, leading to enhanced catalytic performance. The reconstructed cobalt-nickel hydroxides (CoyNi1_y(OH)2) on the catalyst's surface serve as the active phase.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Xinyu Song, Yang Shi, Zelin Wu, Bingkun Huang, Xinhao Wang, Heng Zhang, Peng Zhou, Wen Liu, Zhicheng Pan, Zhaokun Xiong, Bo Lai
Summary: This study explores the discriminative activities and mechanisms for activation of O-O bond in peroxy compounds via single-atom catalysts (SACs) with higher coordination numbers (M-N5). The atomic catalyst (Fe-SAC) with Fe-N5 as the active center was constructed, effectively activating peroxymonosulfate (PMS), peroxydisulfate (PDS), and hydrogen peroxide (H2O2). The study demonstrates the degradation efficiencies of acyclovir are related to the O-O bond length in different peroxy compounds, and reveals the discriminative mechanisms for activation of O-O bond in different Fenton-like systems.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Yangzhuo He, Hong Qin, Ziwei Wang, Han Wang, Yuan Zhu, Chengyun Zhou, Ying Zeng, Yicheng Li, Piao Xu, Guangming Zeng
Summary: A dual-metal-organic framework (MOF) assisted strategy was proposed to construct a magnetic Fe-Mn oxycarbide anchored on N-doped carbon for peroxymonosulfate (PMS) activation. The FeMn@NC-800 catalyst exhibited superior activity with almost 100% degradation of sulfamethazine (SMZ) in 30 minutes. The study provided insights for the rational design of high-performance heterogeneous catalysts and proposed a novel nonradical-based catalytic oxidation for environmental cleaning.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)