Article
Chemistry, Inorganic & Nuclear
Thomas E. Shaw, Charlotte L. Stern, Alfred P. Sattelberger, Titel Jurca
Summary: Group 5 and 6 metal chlorides can be easily and controllably reduced by stoichiometric PhMe2SiH, yielding PhMe2SiCl and H2 as the byproducts. The addition of varying amounts of PhMe2SiH to toluene solutions of MClx leads to stepwise uncoordinated reduction products, which can be further derivatized and used as desired inorganic synthons.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Physical
Yongtao Tan, Yuling Zhu, Haibo Li
Summary: The Mo2N nanoparticles embedded in N, O co-doped carbon sheets composite (Mo2NNPs/NOCS) is a promising electrode material for supercapacitors. These nanoparticles are fabricated by in-situ growth on the surface of self-sacrifice C3N4. The optimized material shows a maximum specific capacitance of 294 F g-1 at 0.5 A g-1. Moreover, when assembled with a commercial activated carbon YP50 as a positive electrode, the supercapacitor device achieves a high energy density of 13.6 Wh kg-1 in an acid electrolyte.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Mohsen Shahryari, Elmira Pajootan, Mohammad Ghavipour, Jan Kopyscinski
Summary: In this study, catalysts consisting of molybdenum, tungsten, and mixed metal oxide and nitride were synthesized and tested on a silica support. The results showed that the nitride catalysts had a lower coke formation rate and higher selectivity towards ethylene, while the Mo/SBA-15 and MoW/SBA-15 catalysts had higher selectivity towards benzene and a faster coke formation rate.
Article
Chemistry, Physical
Jianfei Du, Yongli Shen, Fan Yang, Jiali Wei, Kehan Xu, Xuning Li, Changhua An
Summary: This study presents an in-situ topology strategy to synthesize defective MoN nanosheets with abundant active sites for efficient H2 evolution reaction (HER). The MoN nanosheets/g-C3N4 2D/2D heterojunction formed via this strategy improves the electron transfer rate and inhibits the recombination of photogenerated carriers, leading to a 120-fold increase in H2 production rate compared to bare g-C3N4.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Jinwen Shi, Botong Zheng, Liuhao Mao, Cheng Cheng, Yuchao Hu, Heng Wang, Gaosheng Li, Dengwei Jing, Xianglong Liang
Summary: A dual-precursors co-pyrolysis strategy was used to prepare MoO3/g-C3N4 composite photocatalysts, showing improved photocatalytic performance under visible-light irradiation. The MoS2 precursor facilitated intimate contact with g-C3N4 nanosheets and high dispersity of MoO3, while the strong interaction between MoO3 and g-C3N4 altered the morphology and electronic structure of g-C3N4, generating an efficient Z scheme system in the composite. This cooperative effect significantly enhanced the activity of photocatalytic H-2 evolution, providing valuable insight for the construction of composite photocatalyst systems for visible-light-driven H-2 evolution.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Applied
M. Fuhrer, T. van Haasterecht, J. H. Bitter
Summary: Supported bimetallic molybdenum and tungsten carbides can replace noble metal catalysts for renewable feedstocks conversion. The Mo:W ratio in bimetallic carbide can determine the product distribution. High Mo/W ratio favors aldehydes and alcohols, while low Mo/W ratio favors alkenes. H2 chemisorption is recommended for assessing the intrinsic activity of these catalysts.
Article
Engineering, Environmental
Biswa Nath Bhadra, Md. Mahmudul Hassan Mondol, Sung Hwa Jhung
Summary: The quantitative contribution of microwave in oxidative desulfurization (ODS) of liquid fuel was evaluated and found to enhance the reaction rate and lower the activation energy. The catalyst W2N@C exhibited the highest ODS performance under microwave irradiation, with a 3.4 times higher oxidation rate of thiophene compared to conventional electric heating.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Haibing Che, Liyang Xiao, Wenyuan Zhou, QinQin Zhou, Hongyi Li, Peng Hu, Jinshu Wang, Xiaobo Chen, Huanli Wang
Summary: A facile hydrothermal method was developed to prepare a heterogeneous photocatalyst by decorating nanorod-assembled orbicular WO3.0.5 H2O on porous carbon nitride nanosheets. The catalyst shows enhanced photo-catalytic performance with a hydrogen generation rate significantly higher than that of pristine graphite carbon nitride, providing a new opportunity for exploring advanced catalysts with superior properties for renewable energy utilization.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Environmental
Jiaqi Meng, Xinyue Wang, Yunqing Liu, Miao Ren, Xueyan Zhang, Xuhui Ding, Yihang Guo, Yuxin Yang
Summary: The method of in situ acid-induced self-assembly of melamine and sodium tungstate combined with hydrothermal treatment was used to fabricate oxygen-doped porous sheet-like WO3/g-C3N4 heterojunctions, which exhibit enhanced visible-light photocatalytic activity for the degradation of phenolic pollutants, acetaminophen, and methylparaben. The extraordinary Z-scheme charge transfer manner plays a dominant role in accelerating charge carrier separation and retaining powerful redox ability, while the porous sheet-like nanostructures and oxygen doping positively influence the activity by improving light harvesting, providing plentiful active sites, shortening charge carrier migration distance, and facilitating charge carrier separation.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Xueding Jiang, Kaibang Xiao, Zhang Liu, Weicheng Xu, Fawen Liang, Shengpeng Mo, Xiaolian Wu, Jingzi Beiyuan
Summary: In this study, a novel nitrogen modified carbon quantum dots decorated graphite carbon nitride/molybdenum heterojunction photocatalyst was synthesized and shown to possess outstanding efficiency for tetracycline removal under visible light. The catalyst exhibited excellent stability and catalytic efficiency in real water matrices, providing a promising strategy for efficient contaminated water treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Applied
Elodie Blanco, J. Noe Diaz de Leon, Jose Luis Garcia-Fierro, Nestor Escalona
Summary: The experiments showed that the enrichment of Re on the surface may improve the dispersion of Re and enhance the reaction rate of bimetallic catalysts. XPS results indicated a synergistic effect between Mo and Re carbides, promoting the demethylation of guaiacol to catechol.
Article
Chemistry, Multidisciplinary
Mami Miyairi, Tsuyoshi Taniguchi, Tatsuya Nishimura, Katsuhiro Maeda
Summary: Improved methods for the synthesis of linear and cyclic poly(diphenylacetylene)s using MoCl5- and WCl4-based catalytic systems have been developed. MoCl5 induces migratory insertion polymerization of diphenylacetylenes in the presence of arylation reagents such as Ph4Sn and (ArSnBu3)-Bu-n to produce cis-stereoregular linear poly(diphenylacetyelene)s with high molecular weights. On the other hand, WCl4 induces ring expansion polymerization of diphenylacetylenes in the presence of Ph4Sn or reducing reagents to produce cis-stereoregular cyclic poly(diphenylacetylene)s with high molecular weights. Both catalytic systems are applicable to the polymerization of various diphenylacetylenes having polar functional groups such as esters that are not efficiently polymerized by conventional methods.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Multidisciplinary Sciences
Zhigang Chen, Yafeng Xu, Ding Ding, Ge Song, Xingxing Gan, Hao Li, Wei Wei, Jian Chen, Zhiyun Li, Zhongmiao Gong, Xiaoming Dong, Chengfeng Zhu, Nana Yang, Jingyuan Ma, Rui Gao, Dan Luo, Shan Cong, Lu Wang, Zhigang Zhao, Yi Cui
Summary: This study successfully synthesized tungsten atomic clusters anchored on P-doped carbon materials using a thermal-migration strategy and demonstrated their excellent performance in alkaline hydrogen evolution.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Dexuan Li, Guoshen Zeng, Yaoyao Wu, Zhenyu Zhou, Wei Guo, Chuanhao Li
Summary: Co-catalysts engineering, especially the non-noble traditional metal dichalcogenides, shows great potential in promoting photocatalytic water splitting for hydrogen gas production. In this study, a novel Au induced 1T-MoS2 modified S-doped-g-C3N4 photocatalyst was constructed, which exhibited significantly enhanced photocatalytic hydrogen evolution rate.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Nanoscience & Nanotechnology
Malgorzata Aleksandrzak, Martyna Baca, Michal Pacia, Karolina Wenelska, Beata Zielinska, Ryszard J. Kalenczuk, Ewa Mijowska
Summary: The study presents the photocatalytic activity of molybdenum disulfide structures with different dimensions functionalized with polymeric carbon nitride in the photocatalytic water splitting reaction. Quantum dots functionalized with PCN exhibited the highest photocatalytic efficiency compared to other MoS2 structures due to effective separation of electron-hole pairs, enhanced up-converted photoluminescence, and the highest reactivity of electrons in the conduction band.
Article
Chemistry, Physical
Elodie Blanco, Laurent Piccolo, Dorothee Laurenti, Luca di Felice, Nelly Catherin, Chantal Lorentz, Christophe Geantet, Vincenzo Calemma
APPLIED CATALYSIS A-GENERAL
(2018)
Article
Agricultural Engineering
Mathieu Ozagac, C. Bertino-Ghera, D. Uzio, A. Quignard, D. Laurenti, C. Geantet
BIOMASS & BIOENERGY
(2018)
Article
Chemistry, Applied
N. Catherin, E. Blanco, L. Piccolo, D. Laurenti, F. Simonet, C. Lorentz, E. Leclerc, V. Calemma, C. Geantet
Article
Chemistry, Physical
Junjie Pu, Thanh-Son Nguyen, Emmanuel Leclerc, Chantal Lorentz, Dorothee Laurenti, Isabelle Pitault, Melaz Tayakout-Fayolle, Christophe Geantet
APPLIED CATALYSIS B-ENVIRONMENTAL
(2019)
Article
Engineering, Chemical
Leon Fagner Feitosa, Gilles Berhault, Dorothee Laurenti, Victor Teixeira da Silva
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2019)
Article
Engineering, Environmental
Junjie Pu, Dorothee Laurenti, Christophe Geantet, Melaz Tayakout-Fayolle, Isabelle Pitault
CHEMICAL ENGINEERING JOURNAL
(2020)
Article
Energy & Fuels
C. Herrera, I. T. Ghampson, K. Cruces, C. Sepulveda, L. Barrientos, D. Laurenti, C. Geantet, R. Serpell, D. Contreras, V Melin, N. Escalona
Article
Chemistry, Applied
N. Catherin, E. Blanco, D. Laurenti, L. Piccolo, F. Simonet, C. Lorentz, E. Leclerc, V Calemma, C. Geantet
Summary: The research explored the performance of various transition metal sulfides supported on Y zeolites in gas-phase decalin hydroconversion under high hydrogen pressure (5 MPa) and in the presence of 0.8% H2S concentration. The study revealed that catalytic activity was enhanced by using ternary sulfides, such as noble metal-based sulfides, leading to high decalin conversion levels and ring opening products.
Article
Materials Science, Multidisciplinary
Santiago Palencia-Ruiz, Dorothee Laurenti, Denis Uzio, Christelle Legens, Pavel Afanasiev
Article
Chemistry, Applied
Dolores Bourbiaux, Junjie Pu, Franck Rataboul, Laurent Djakovitch, Christophe Geantet, Dorothee Laurenti
Summary: Catalytic depolymerization of lignin can produce aromatic chemicals and BTX fuels, with high-added value chemicals like vanillin obtained under oxidative atmosphere, and alkylphenolics and BTX mainly observed under reductive atmosphere. The outcome of depolymerization strongly depends on the reaction conditions.
Article
Chemistry, Physical
Wanwitoo Wanmolee, Narongrit Sosa, Anchalee Junkaew, Saran Youngjan, Christophe Geantet, Pavel Afanasiev, Eric Puzenat, Dorothee Laurenti, Kajornsak Faungnawakij, Pongtanawat Khemthong
Summary: In situ characterization is essential for the development of heterogeneous catalysts. This study used XAS and XRD techniques to investigate the synthesis of Cu3P/SiO2 and its catalytic performance in lignin-derived bio-oil conversion. The findings can contribute to the enhancement of metal phosphide-based catalysts for converting lignin-derived bio-oils into biofuels in the future.
APPLIED SURFACE SCIENCE
(2022)
Article
Green & Sustainable Science & Technology
Laura Carolina Cardenas Velandia, Anne Elisabeth Fontaine, Denis Loquet, Ruben Checa, Chantal Lorentz, Bruno Bujoli, Nolven Guilhaume, Christophe Geantet, Emmanuel Chailleux, Clemence Queffelec, Dorothee Laurenti
Summary: The remaining residues of Spirulina can be processed into a biocrude similar to petroleum bitumen through hydrothermal liquefaction. The addition of different catalysts and increasing reaction time can optimize the rheological properties of the biocrude.
JOURNAL OF CLEANER PRODUCTION
(2021)
Review
Energy & Fuels
Chetna Mohabeer, Nolven Guilhaume, Dorothee Laurenti, Yves Schuurman
Summary: This paper reviews the research progress on the thermo-chemical conversion of lignocellulosic biomass and waste into energy, focusing on both traditional thermally-heated reactors and microwave-heated reactors. Microwave-assisted pyrolysis (MAP) technology shows great potential, but there are also technical challenges to be addressed. The types of catalysts used and their impacts are discussed, and the advantages and drawbacks of fluidised bed reactors are detailed. Finally, future prospects of MAP are briefly presented.
Article
Chemistry, Analytical
William de Rezende Locatel, Chetna Mohabeer, Dorothee Laurenti, Yves Schuurman, Nolven Guilhaume
Summary: This study investigated the pyrolysis process of pure beech wood and a mixture of beech wood and polyamide-6, and found that the presence of polyamide-6 affected the properties and composition of the bio-oils produced. The use of a catalyst showed beneficial effects on pure beech wood, but these effects were mitigated with the mixture of beech wood and polyamide-6.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Chemistry, Physical
Bruno C. Magalhaes, Ruben Checa, Chantal Lorentz, Mathieu Prevot, Pavel Afanasiev, Dorothee Laurenti, Christophe Geantet
Summary: Global energy demand and environmental concerns have led to a growing emphasis on fuel production from renewable resources. Microalgae offer an attractive alternative carbon source. This study investigated the hydroconversion of bio-oil derived from hydrothermal liquefaction of microalgae using supported catalysts. NiW sulfide catalysts proved to be the most efficient, producing a hydrotreated oil with superior properties. The results suggest that different catalysts promote different reaction pathways, contributing to the conversion of refractory compounds.
