Article
Chemistry, Inorganic & Nuclear
Tanna Elyn Rodrigues Fiuza, Danielle Santos Goncalves, Daniela Zanchet
Summary: CeO2, when used as a promoter, enhances catalytic activity, but its impact on CeOx species and Cu reincorporation into the Au lattice in AuCu/SiO2 catalysts is crucial for the activity and stability of the CO-PROX reaction.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Srisin Eaimsumang, Nuwong Chollacoop, Apanee Luengnaruemitchai, Stuart H. Taylor
Summary: This study demonstrates a simple hydrothermal synthesis approach for preparing CeO2-supported gold (Au) catalysts, which exhibit enhanced catalytic performance in oxidation reactions when the reducibility of CeO2 support increases and the number of adsorbed peroxide species on the support increases due to Au addition.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Physical
Christos Papadopoulos, Konstantinos Kappis, Joan Papavasiliou, John Vakros, Aspasia Antonelou, Wojciech Gac, Haibin Li, George Avgouropoulos
Summary: CuCe mixed oxides are commonly used for preferential CO oxidation in the purification of hydrogen-rich gas stream. This study investigated the synthesis of various ceria supports and the preparation of CuCe mixed-oxide catalysts. It found that modifying the hydrothermal parameters can tune the properties of the supports, leading to highly active and selective catalysts. The nature of the reduced copper species and the optimum content in oxygen vacancies play crucial roles in the catalytic performance.
Article
Chemistry, Physical
Aggeliki Papavasiliou, Benedetta Oliani, Mirko Scanferla, Elias Sakellis, Antonella Glisenti, Paolo Canu, Fotis K. Katsaros
Summary: Mesoporous multicomponent materials based on alumina are synthesized through a facile evaporation-induced-self-assembly method. The addition of citric acid is found to be crucial in obtaining high mesoscopic order and notable homogeneity. After thermal aging, the distribution of metal oxides and nanoporous nature are well-preserved, with a parallel nucleation of ceria nanoparticles into the semi-crystalline framework. The catalytic activity is drastically enhanced, especially for the Cu-Ce-Al system, due to the material's structural reconstruction and its effect on metal-support interaction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Igor Yu. Kaplin, Ekaterina S. Lokteva, Konstantin I. Maslakov, Artem V. Tikhonov, Andrey N. Kharlanov, Alexander V. Fionov, Alexey O. Kamaev, Oksana Ya. Isaikina, Sergey V. Maksimov, Elena V. Golubina
Summary: This study focused on the synthesis and characterization of mesoporous CeO2-SiO2 catalysts with different Ce:Si ratios, as well as the addition of copper for modification, to understand their effects on CO-PROX reactions. The catalyst with an equimolar Ce:Si ratio showed better catalytic performance, while CuOx/CeSiO (Ce:Si=4:1) exhibited superior low-temperature activity, CO2 selectivity, and stability due to its unique structure and properties.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Mostafa Aly, Thobani G. Gambu, Yaoyuan Zhang, Vladimir V. Galvita, Mark Saeys
Summary: The study investigates the selective oxidation of hydrogen in CO-rich streams resembling steel mill gases and finds that high water selectivity can be achieved under certain conditions, reducing the industry's carbon footprint.
Article
Chemistry, Physical
Lei Gong, Weiwei Jie, Yumeng Liu, Xinchen Lin, Wenyong Deng, Mei Qiu, Xiuxia Hu, Qian Liu
Summary: Nanosized ceria was synthesized using a facile method in 2-methylimidazole solution, which exhibited excellent catalytic activity in the preferential oxidation of CO in H2-rich gases. The CuO/n-CeO2 catalyst with higher copper loading, CuCeO9, showed the highest activity and stability for complete CO conversion.
Article
Chemistry, Physical
Rodolfo M. Antoniassi, Arthur P. Machado, Ana Rita N. Paiva, Carla M. S. Queiroz, Jorge M. Vaz, Estevam Spinace, Julio Cesar M. Silva, Eduardo Carmine, Pedro H. C. Camargo, Roberto M. Torresi
Summary: An efficient Pt20Fe/CeO2 catalyst was synthesized using a simple borohydride reduction process, showing excellent CO conversion and CO2 selectivity at ambient temperature, meeting the requirements for hydrogen supply in fuel cell devices.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Wanjun Zhao, Hui Dang, Lijun Yue, Yongzhao Wang, Ruifang Wu, Haitao Li, Yongxiang Zhao
Summary: A series of Pd-Cu-xSn/Al2O3 catalysts with low tin content were prepared and used for low-temperature CO preferential oxidation (CO-PROX) in H2-rich stream. The addition of Sn promoted the interaction between Sn species and PdCu/Al2O3, improving the stability of active Cu2Cl(OH)3 species. The doping of Sn also hindered the reduction of active Pd species and facilitated the reoxidation of Cu+ species.
Article
Chemistry, Physical
Yongke Wang, Qiuyue Zhang, Yuwen Lin, Wujun Huang, Ding Ding, Yanping Zheng, Mingshu Chen, Huilin Wan
Summary: Stabilizing Cu+ on the surface of CeO2 was found to achieve high selectivity for CO oxidation, while Cu-0 was more favorable for H-2 oxidation at higher temperatures.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Zhiqiang Wang, Lixin Zhang, Jiawei Ji, Yuchao Wu, Yandi Cai, Xiaojiang Yao, Xianrui Gu, Yan Xiong, Haiqin Wan, Lin Dong, Yu-Wen Chen
Summary: The study presents a novel catalyst Ir/Ce/gamma-Al2O3 for complete oxidation of toluene, featuring small CeO2 and Ir-0 nanoparticles that exhibit higher catalytic activity. Results from XRD, TEM, Raman, and XPS indicate a strong interaction between IrO2 and small CeO2 nanoparticles, leading to enhanced catalytic performance. This development in synthesizing iridium-based catalysts shows promise for the catalytic oxidation of VOCs.
APPLIED SURFACE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Lesia Piliai, Peter Matvija, Thu Ngan Dinhova, Ivan Khalakhan, Tomas Skala, Zdenek Dolezal, Oleksii Bezkrovnyi, Leszek Kepinski, Mykhailo Vorokhta, Iva Matolinova
Summary: In this study, the metal-substrate interaction and species transformation during CO oxidation on CeO2(111) surface were investigated. It was found that the interaction between gold nanoparticles and peroxo oxygen species formed on ceria step edges resulted in the formation of ionic gold species. Moreover, the addition of O2 led to the rapid growth of Au particles and the formation of large particles.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Xinglin Hou, Qinyang Zhao, Zichen Liu, Dang-Guo Cheng, Fengqiu Chen, Xiaoli Zhan
Summary: By regulating the stability of ceria crystal planes, the catalytic performance of copper species can be enhanced in CO preferential oxidation (COPROX). The study found that the mass transfer between CuOx clusters and CeO2 weakened, and the sintering of CuOx enhanced as the stability of CeO2 exposed planes increased. The CuO/CeO2-400 catalyst prepared from CeO2-400 with suitable crystal plane stability exhibited the highest amount of Cu+-CO and optimal reactivity in the CO-PROX reaction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Zhihuan Qiu, Xiaolin Guo, Jianxin Mao, Renxian Zhou
Summary: This study investigates the outward migration of Cu species induced by high temperature thermal treatment in a series of CuOx-CeO2 catalysts. The results show that thermal treatment at 700 degrees C promotes the migration of Cu species from bulk to the surface of CeO2 nanoparticles, leading to the recovery of low temperature catalytic performance.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Environmental
Yaeun Seo, Min Woo Lee, Hyun Jae Kim, Jin Woo Choung, ChangHo Jung, Chang Hwan Kim, Kwan-Young Lee
Summary: The study showed that doping with appropriate amounts of Ag can increase the oxygen storage capacity of the catalyst and form active Pd-0 species, leading to improved catalytic activity for the oxidation of CO and C3H6.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Physical
Charlotte Croise, Khaled Alabd, Sophie Tence, Etienne Gaudin, Antoine Villesuzanne, Xavier Courtois, Nicolas Bion, Fabien Can
Summary: This study investigates the influence of rare-earth (R) element in Ru/RScSi electride-like intermetallic catalysts for ammonia synthesis under mild conditions. The catalytic performances follow the lanthanides series and appear correlated with the formation of the hydride phase. Ru-1.7/CeScSi shows remarkable catalytic activity associated with its reversible hydrogen storage-release properties. It is suggested that NHX formation could be the rate determining step rather than the N-2 cleavage over these catalysts.
Article
Engineering, Environmental
Madan Mohan Behera, Carmen Ciotonea, Lilian Olivet, Lucette Tidahy, Sebastien Royer, Diane Thomas, Renaud Cousin, Guy De Weireld, Stephane Siffert, Christophe Poupin
Summary: This study investigates the removal of NO from cement-type industrial flue gases using Cu-Al mixed metal oxides as catalysts. The researchers found that Cu-Al-CO2 catalyst showed the highest activity for NO reduction even in the absence of water. The study also introduces a novel method for synthesizing mixed oxides using CO2 treatment. The results demonstrate the effectiveness of CO2 treatment in enhancing the catalytic performance for NO reduction.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Amanda Sfeir, Camila A. Teles, Maya Marinova, Herve Vezin, Jean-Philippe Dacquin, Axel Lofberg, Said Laassiri, Sebastien Royer
Summary: Modulating the interaction between Mo nanoparticles and their support can finely tune the properties of the active site. In this study, molybdenum nitride catalysts supported on TiO2 and SBA-15 were prepared and characterized. The catalytic activity of Mo species was strongly influenced by the nature of the support, with SBA-15 being the most suitable for Mo dispersion. Mo species supported on a reducible oxide (TiO2) exhibited poor catalytic activity and quick deactivation in ammonia synthesis reaction due to charge transfer from the support. Differences in oxidation states, redox behaviors, and electronic properties were further studied.
FARADAY DISCUSSIONS
(2023)
Article
Chemistry, Applied
Maxime Delporte, Helena Kaper, Fabien Can, Nicolas Bion, Xavier Courtois
Summary: The use of expensive precious metal based catalysts has shown promise for catalytic treatment of residual refractory methane in the exhaust gas from NGV engines. Recent research has found that combining a perovskite with a Pd/YSZ catalyst improves both oxygen exchange behavior and methane oxidation. This study aims to investigate the concept of this dual catalytic bed system under more realistic conditions, and found that the configuration promoted CH4 abatement in lean mixture but was inhibited by CO2 and H2O.
TOPICS IN CATALYSIS
(2023)
Article
Chemistry, Physical
Charlotte Croise, Khaled Alabd, Antoine Villesuzanne, Fabien Can, Xavier Courtois, Etienne Gaudin, Sophie Tence, Nicolas Bion
Summary: Ru/LaScSi and Ru/CeTiGe were found to be the most active catalysts for ammonia synthesis, with Ru/LaScSi exhibiting electride-like properties and Ru/CeTiGe following an associative mechanism with the assistance of absorbed H. This conclusion was drawn through a combination of DFT calculations and 15N/14N homomolecular exchange experiments.
CATALYSIS COMMUNICATIONS
(2023)
Article
Chemistry, Applied
Olena Vozniuk, Thomas Cacciaguerra, Nathalie Tanchoux, Stefania Albonetti, Lorenzo Stievano, Jean-Marc M. Millet, Nicolas Bion, Francesco Di Renzo, Fabrizio Cavani
Summary: Copper-manganese spinel ferrites were evaluated as solid oxygen carriers for hydrogen production from water. The nature of the oxygen carrier phases greatly affected the amount and purity of hydrogen produced. Cu-rich ferrites were reduced to metallic copper and iron carbides, while Mn-rich ferrites were less deeply reduced to manganowustite. The oxidation reactions of ethanol by Cu-ferrites mainly produced CO and CO2, while Mn-ferrites mainly formed oxydehydrogenation products. The production of CO and CO2 during the reoxidation negatively affected the purity of the hydrogen formed.
Article
Chemistry, Physical
Carmen Ciotonea, Yaqian Wei, Adrian Ungureanu, Cezar Catrinescu, Olivier Gardol, Anne-Sophie Mamede, Franck Dumeignil, Sebastien Paul, Louise Jalowiecki-Duhamel, Sebastien Royer
Summary: This study investigates the use of nickel-based materials in the dry reforming of methane, an important process for producing hydrogen and syngas. Ni nanoparticles are formed from porous phyllosilicates under reducing conditions. The nanoparticles are highly dispersed even at high metal loadings, and show excellent resistance to sintering and carbon formation. The results demonstrate the potential of these materials for DRM applications.
Article
Chemistry, Physical
Remy Pointecouteau, Pierre Florian, Vincent Rodriguez, Nicolas Bion, Alain Demourgues
Summary: Cerium-based complex oxides are important materials for various applications in heterogeneous catalysis and electrocatalysis. The influence of structural defects on the thermal stability of the surface is still not fully understood. By using La-139 NMR and Raman spectroscopy, the lanthanum environments and associated defects in cerium-based compounds were analyzed. An unusual isolated La pseudo-cubic site was found to exist, and when thermally stable, it maintains a high specific surface area for catalytic applications at high temperatures.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Alexandre Nau, Remy Pointecouteau, Melissandre Richard, Thomas Belin, Fabien Can, Clement Comminges, Nicolas Bion
Summary: Catalytic methane combustion experiments were conducted on YSZ, Pd/YSZ, and Rh/YSZ at temperatures ranging from 200 to 700 degrees Celsius. While Pd/YSZ and Rh/YSZ exhibited similar light-off curves between 200 and 450 degrees Celsius, isotopic exchange experiments using CD4 and 18O2 revealed differences in the activation of reactant molecules for both supported catalysts. The use of C18O2 isotopic gas was found to be more suitable than 18O2 to evaluate the bulk oxygen mobility in YSZ at low temperatures. The exchange of gaseous CO2 with lattice YSZ oxygen atoms, facilitated by surface hydrogen carbonate intermediate species, demonstrated the contribution of YSZ bulk oxygen atoms in Rh/YSZ at low temperatures.
CATALYSIS COMMUNICATIONS
(2023)
Article
Engineering, Chemical
Vitor Duarte Lage, Anthony Le Valant, Nicolas Bion, Fabio Souza Toniolo
Summary: The catalytic conversion of CO2 and H2 into valuable chemicals is a promising alternative to address energy and environmental challenges. In this study, a facile K-Co-Cu-Al catalyst was developed for the selective conversion of CO2 into higher alcohols. By adjusting the Co:Cu ratio, reduction temperature, and reaction conditions, the selectivity and yield of higher alcohols were greatly enhanced.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Physical
Camila A. Teles, Carmen Ciotonea, Sebastien Royer, Frederic Richard
Summary: The transformation of furfural-acetone condensation adduct (FAc) was studied over molybdenum supported on SBA-15 doped with different acid/oxophilic species. The results showed that the dopants enhanced the activity and selectivity of the catalyst.
Article
Nanoscience & Nanotechnology
Nisrine Hammi, Mickaele Bonneau, Abdelkrim El Kadib, Susumu Kitagawa, Thierry Loiseau, Christophe Volkringer, Sebastien Royer, Jeremy Dhainaut
Summary: This study investigates the use of chitosan hydrogel microspheres as a template for growing an extended network of MOF-type HKUST-1. Different drying methods (supercritical CO2, freeze-drying, and vacuum drying) were used to generate three-dimensional polysaccharide nanofibrils embedding MOF nanoclusters. The resulting HKUST-1@Chitosan beads exhibit uniform and stable loadings of HKUST-1 and were used for the adsorption of CO2, CH4, Xe, and Kr. The maximum adsorption capacity of CO2 was found to be 1.98 mmol center dot g(-1) at 298 K and 1 bar, which is significantly higher than those of most MOF-based composite materials. Based on Henry's constants, thus-prepared HKUST-1@CS beads also exhibit fair selectivity for CO2 over CH4 and Xe over Kr, making them promising candidates for capture and separation applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Yin Xu, Jeremy Dhainaut, Jean-Philippe Dacquin, Jean-Francois Lamonier, Hui Zhang, Sebastien Royer
Summary: Defect engineering in catalytic materials, specifically modifying the A-site cationic vacancies, has been proven to be a feasible strategy for optimizing the catalytic performance of perovskite materials, as demonstrated by the enhanced formaldehyde oxidation activity of La1-xMnO3 materials.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Materials Science, Multidisciplinary
Nisrine Hammi, Marta Kedzierska, Natalia Wronska, Nadia Katir, Jeremy Dhainaut, Sebastien Royer, Katarzyna Lisowska, Maria Bryszewska, Katarzyna Milowska, Abdelkrim El Kadib
Summary: Evaporation-induced co-assembly of boron nitride-exfoliated chitosan hydrogel provides micrometer-thick boron nitride-filled chitosan nanocomposite films. Increasing the loading of boron nitride improves the wettability, mechanical and thermal properties of the films, as well as the antibacterial properties, making them potential metal-free, antibacterial surface coating materials.
MATERIALS ADVANCES
(2023)
Article
Materials Science, Multidisciplinary
Nisrine Hammi, Marta Kedzierska, Natalia Wronska, Nadia Katir, Jeremy Dhainaut, Sebastien Royer, Katarzyna Lisowska, Maria Bryszewska, Katarzyna Milowska, Abdelkrim El Kadib
Summary: Evaporation-induced co-assembly of boron nitride-exfoliated chitosan hydrogel provides micrometer-thick boron nitride-filled chitosan nanocomposite films with improved mechanical and thermal properties, as well as enhanced antibacterial performance.
MATERIALS ADVANCES
(2023)
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)