Article
Materials Science, Ceramics
Rui Zhang, Zhen Wang, Yifan Meng, Shiyan Jiao, Jixiang Jia, Yi Min, Chengjun Liu
Summary: A comprehensive study of the structural properties of CaO-Al2O3-SiO2 systems was conducted using Raman and MAS-NMR spectroscopies, revealing that CaO can promote the transformation of aluminum structures from six-coordinated to four- and five-coordinated states, with a stronger depolymerization effect, especially on [AlO4]-tetrahedrons. Additionally, non-bridging oxygen numbers per coordinated atom (NBO/T) corresponding to the transition of aluminum speciation were obtained, providing insights into the structural changes in the materials.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Xiaohui Tang, Jinglin You, Jian Wang, Fu Zhang, Xiaoye Gong, Yingfang Xie, Aurelien Canizares, Catherine Bessada, Kai Tang, Liming Lu
Summary: The structural behaviors of Al3+ in aluminosilicate systems were investigated using Raman spectroscopy and 27Al MAS NMR. It was found that the addition of Al2O3 resulted in the gradual production of AlIV and a nonmonotonic variation in Q3. The effects of aluminum on bridging oxygen bond types and the degree of polymerization were also discussed.
CERAMICS INTERNATIONAL
(2023)
Article
Multidisciplinary Sciences
Xing Chen, Xiao-Ting Wang, Jia-Bo Le, Shu-Min Li, Xue Wang, Yu-Jin Zhang, Petar Radjenovic, Yu Zhao, Yao-Hui Wang, Xiu-Mei Lin, Jin-Chao Dong, Jian-Feng Li
Summary: Ruthenium shows comparable or even better activity than platinum for alkaline hydrogen evolution reaction, but its mechanistic aspects are not yet resolved. In this study, in situ Raman spectroscopy and theoretical calculations are combined to elucidate the dynamic spectral evidence of Ru surfaces, interfacial water, *H, and *OH intermediates. The different valence states of Ru surfaces, as well as the hydrated Na+ ion water and high-valence Ru(n+) surfaces, contribute to the dissociation of interfacial water and the generation of two distinct *H, leading to different activities. The regulation of valence state on interfacial water, intermediates, and catalytic activity provides guidelines for the rational design of high-efficiency catalysts.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Ceramics
Brian Topper, Elizabeth M. Tsekrekas, Lucas Greiner, Randall E. Youngman, Efstratios Kamitsos, Doris Moncke
Summary: The structures of glasses in the lithium-bismuth orthoborate composition range show deviation from the short-range order structure of crystalline end-members. The increase in bismuth oxide content leads to an increase in the fraction of tetrahedral boron and a continuous rise in glass transition temperature. However, the glass stability reaches a maximum in the multicomponent glass of x = 40.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
J. Becker, J. Pelle, S. Rioual, B. Lescop, N. Le Bozec, D. Thierry
Summary: This study investigated the effect of two concentrations of H2S on the atmospheric corrosion of pure Ag, Cu, and Ni. The corrosion products were analyzed using various techniques such as SEM/EDX, Raman spectroscopy, XPS, and XRD. Different corrosion products were identified based on the characterization methods, providing a better understanding of the impact of H2S on the atmospheric corrosion of these metals. The possible mechanisms involved in the formation of these corrosion products were also discussed in this study.
Review
Chemistry, Physical
Francisco Zaera
Summary: Catalysis in industrial chemical processes has long been studied through various spectroscopic techniques like vibrational and X-ray spectroscopies, allowing for a molecular-level understanding of catalytic mechanisms. These techniques help researchers explore the intricate details of catalytic processes and advancements in the field.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Parmeet Dhindsa, David Solti, Christian R. Jacobson, Anvy Kuriakose, Gopal Narmada Naidu, Aaron Bayles, Yigao Yuan, Peter Nordlander, Naomi J. Halas
Summary: This study provides direct insight into the role of catalyst molecular structure in controlling the morphology of aluminum nanocrystals (Al NCs) by systematically modifying the catalyst molecular structure.
Article
Chemistry, Applied
Yash Gupte, Abhishek Kulkarni, Balu Raut, Purbasha Sarkar, Rudra Choudhury, Akshay Chawande, G. Raja Krishna Kumar, Bhaskar Bhadra, Ajit Satapathy, Gautam Das, B. Vishnupriya, Santanu Dasgupta
Summary: Bacterial nanocellulose production from Acetobacter strains isolated from organic waste and fermented tea was studied, with optimal glycerol concentration found to be 1%. The study showed a maximum productivity of 4.5 g/L of bacterial nanocellulose and an average nitrogen and phosphorus consumption rate of 45 mg/L/day each. Physical properties such as crystallinity and fibril dimensions varied based on the carbon source used.
CARBOHYDRATE POLYMERS
(2021)
Article
Chemistry, Physical
Trent R. Graham, Brandy N. Gartman, Anjelica Bautista, Lindsay E. I. Irwin, Eden J. Shelby, Danielle L. Saunders, Timothy J. Johnson, Mark K. Murphy, Nicolas Uhnak, Andrew M. Ritzmann, James M. Bowen
Summary: This study explores the sensitivity and limitations of various spectroscopic techniques in detecting changes in iodine speciation. The results show that commonly used spectroscopies have different sensitivities to various iodine species. Through the analysis of Raman, FTIR, and NMR spectra, high-resolution autocorrelation spectra are generated to track the acidification-induced and gamma irradiation-induced transformations of iodine. This research provides insights for designing optimal combinations of techniques to detect different forms of iodine.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Optics
Fan Wang, Meng Wang, Chongyun Shao, Jinjun Ren, Lei Zhang, Shikai Wang, Danping Chen, Chunlei Yu, Suya Feng, Lili Hu
Summary: The modified sol-gel method combined with high temperature sintering significantly improved the fluorine doping concentration in Yb/Al/P/F co-doped silica glass. The incorporation of fluorine forms Si-F bonds and Yb-F bonds, leading to a mild change in spectroscopic properties, and allows for the preparation of an optimized photonic crystal fiber with high Yb and fluorine doping concentration.
Article
Chemistry, Multidisciplinary
Kuizhi Chen, Zhehong Gan, Sarah Horstmeier, Jeffery L. White
Summary: The structure of aluminum-containing moieties in and within zeolite H-ZSM-5 catalysts is influenced by various factors and can be analyzed using Al-27 NMR data. Nonframework aluminum species can be detected post hydrothermal exposure and distinguished from partially coordinated framework sites. Hydration impacts the appearance and interpretation of conventional Al-27 spectra, and initial assessment of aluminum sites in high-Al content MFI catalysts can guide reaction conditions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Anshul Gupta, Gino Baron, Patrice Perreault, Silvia Lenaerts, Radu-George Ciocarlan, Pegie Cool, Paulo G. M. Mileo, Sven Rogge, Veronique Van Speybroeck, Geert Watson, Pascal Van der Voort, Maarten Houlleberghs, Eric Breynaert, Johan Martens, Joeri F. M. Denayer
Summary: Clathrates, as a promising material for hydrogen storage, have advantages such as low cost, reversible reaction, environmentally friendly nature, and low risk of flammability, despite the lower capacity predicted by simulations. The ability to tailor the properties of clathrates and the rapid technological advancements in this field provide immense opportunities for customization and growth. This review aims to analyze the current developments in solid-state hydrogen storage materials, focusing on hydrogen clathrates, and presents a global overview for future research.
ENERGY STORAGE MATERIALS
(2021)
Article
Materials Science, Ceramics
Bing Yuan, Bruce G. Aitken, Derrick C. Kaseman, Ping Yu, Sabyasachi Sen
Summary: The atomic structure of glass along the P4Se3-As4Se3 join with different compositions was studied using various spectroscopic techniques. The results showed the coexistence of cage-like molecular moieties and corner-shared network moieties in these glasses. The increase in substitution of As with P correlated with an increase in the ratio of molecules to network, which also affected the glass transition temperature.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Chemistry, Physical
Anton Mazur, Peter Tolstoy, Konstantinos Sotiriadis
Summary: The effects of organic additives, specifically acetic acid and sodium acetate, on the hydration process of Portland-limestone cement pastes were studied using solid-state C-13, Al-27, and Si-29 NMR spectroscopy. The results showed that these additives retard the cement hydration at early age and influence the kinetics of phase formation.
Article
Food Science & Technology
Yaotong Liu, Mingmin Qing, Jingnan Zang, Yujie Chi, Yuan Chi
Summary: Salted egg yolks are highly regarded by consumers for their taste and processing characteristics. This study compared the effects of CaCl2 on the salting process of egg yolks and found that CaCl2 increased the mass transfer and diffusion coefficient, resulting in changes in the texture, water migration, protein aggregation, and structure of salted egg yolks. The addition of CaCl2 promoted the precipitation of lipids, dehydration of egg yolk, and bulk aggregation of proteins. The analysis of protein structures showed changes in the content of beta-sheets, irregular curls, alpha-helices, and beta-turns. Overall, the addition of CaCl2 improved the degree of protein polymerization and could be used to enhance the quality of salted egg yolks.
FOOD RESEARCH INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
C. Oumahi, M. I. De Barros-Bouchet, T. Le Mogne, C. Charrin, S. Loridant, C. Geantet, P. Afanasiev, B. Thiebaut
Article
Chemistry, Physical
Z. Buniazet, C. Lorentz, A. Cabiac, S. Maury, S. Loridant
MOLECULAR CATALYSIS
(2018)
Article
Chemistry, Physical
Francois Giraud, Julien Couble, Christophe Geantet, Nolven Guilhaume, Stephane Loridant, Sebastien Gros, Lynda Porcheron, Mohamed Kanniche, Daniel Bianchi
JOURNAL OF PHYSICAL CHEMISTRY C
(2018)
Article
Chemistry, Physical
Marwa Abou Hamdan, Stephan Loridant, Mohamad Jahjah, Catherine Pinel, Noemie Perret
APPLIED CATALYSIS A-GENERAL
(2019)
Article
Chemistry, Physical
Z. Buniazet, A. Cabiac, S. Maury, D. Bianch, S. Loridant
APPLIED CATALYSIS B-ENVIRONMENTAL
(2019)
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
Thanh-Son Nguyen, Yousef Swesi, David Edouard, Pascal Fongarland
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2019)
Article
Chemistry, Physical
Elodie Blanco, Qingyi Gu, Julien Couble, Lucile Martin, Thomas Onfroy, Guylene Costentin, Jean-Francois Paul, Carine Michel, Stephane Loridant
JOURNAL OF PHYSICAL CHEMISTRY C
(2020)
Article
Chemistry, Applied
Stephane Loridant
Summary: This paper reviews the various opportunities offered by Raman spectroscopy for advanced characterization of ceria-based catalysts, including spectral modifications induced by nanocrystallinity, defects, doping, reduction, identification of supported molecular species, isolated atoms, nanoclusters, surface modes, hydroxyl groups, and reaction intermediates. In situ/operando studies for environmental catalysis are also summarized, highlighting Raman spectroscopy as a powerful tool for characterizing ceria-based catalysts.
Article
Chemistry, Multidisciplinary
Z. Buniazet, J. Couble, S. Maury, A. Cabiac, S. Loridant, D. Bianchi
Article
Chemistry, Multidisciplinary
J. Couble, Z. Buniazet, S. Loridant, D. Bianchi
Article
Chemistry, Physical
Eugenie Blaser, Cecile Rosier, Michel Huet, Christophe Geantet, Stephane Loridant
Summary: This paper investigates the side reaction of CH3Cl cracking during the synthesis of methylchlorosilanes from Si and CH3Cl, and its impact on Cu-based phases. The study reveals that the carbonaceous compounds formed from CH3Cl cracking deactivate the Cu3Si active phase and cover the active sites, leading to the inactivation. This finding highlights the significance of the coke formation on Cu activity in the direct synthesis.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Luis Cardenas, Clement Molinet-Chinaglia, Stephane Loridant
Summary: This study conducted a sequential analysis using UPS and XPS on ceria nanopowders to investigate the influence of X-ray beam on the oxide's surface. It was found, for the first time, that XPS analysis had a photoreductive effect on ceria after an oxidative pretreatment, leading to an overestimation of the Ce3+/Ce4+ ratio obtained by XPS. This spectroscopy methodology, particularly UPS, emerged as a leading technique for powder analysis with minimal impact on the authentic chemical state, facilitating the identification of the actual Ce4+ and Ce3+ ratio of ceria after oxidative and reductive in situ treatments.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Eugenie Blaser, Cecile Rosier, Michel Huet, Perrine Chaurand, Christophe Geantet, Stephane Loridant
Summary: Thermal cracking of CH3Cl at temperatures higher than 400 degrees C can lead to the formation of solid coke composed of chlorinated hydrocarbons. The chlorine present in this coke activates the cracking process at lower temperatures, resulting in the formation of HCl, CH4, and hydrocarbons.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
G. Ferre, M. Aouine, F. Bosselet, L. Burel, F. J. Cadete Santos Aires, C. Geantet, S. Ntais, F. Maurer, M. Casapu, J-D Grunwaldt, T. Epicier, S. Loridant, P. Vernoux
CATALYSIS SCIENCE & TECHNOLOGY
(2020)
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)
