Article
Chemistry, Physical
Ning Yuan, Arnar Gudmundsson, Karl P. J. Gustafson, Michael Oschmann, Cheuk-Wai Tai, Ingmar Persson, Xiaodong Zou, Oscar Verho, Eva G. Bajnoczi, Jan-E Backvall
Summary: By utilizing in situ X-ray absorption spectroscopy (XAS), researchers uncovered the deactivation mechanism of palladium catalyst in the cycloisomerization of acetylenic acids and developed an improved catalytic protocol that is less prone to deactivation.
Article
Chemistry, Multidisciplinary
Yuting Li, Yu Tang, Franklin (Feng) Tao
Summary: This article reports a new supported catalyst, Rh-1/P25, consisting of singly dispersed Rh-1 atoms anchored on TiO2 (P25) nanoparticles. The Rh-1/P25 catalyst exhibits high activity for C-N coupling and demonstrates selectivity of higher than 90% for producing tertiary amines in six hydroaminoalkylation reactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Physics, Applied
Juan-Jesus Velasco-Velez, Lorenz J. Falling, Denis Bernsmeier, Michael J. Sear, Pip C. J. Clark, Ting-Shan Chan, Eugen Stotz, Michael Haevecker, Ralph Kraehnert, Axel Knop-Gericke, Cheng-Hao Chuang, David E. Starr, Marco Favaro, Rik Mom
Summary: In situ x-ray spectroscopies are a powerful tool for studying the electronic structure of the electrode-electrolyte interface, but the design of spectro-electrochemical cells plays a crucial role in determining the measurements and processes that can be studied. It is important to choose the right cell design for the specific process of interest, and understanding the opportunities and limitations of different cell designs through case studies is essential for practical experiments.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Review
Biochemistry & Molecular Biology
Valentina Bonanni, Alessandra Gianoncelli
Summary: Scanning transmission X-ray microscopy (STXM) allows imaging of biological specimens and collection of localized spectroscopic information through X-ray fluorescence (XRF) and/or X-ray Absorption Near Edge Spectroscopy (XANES). Recent publications in synchrotrons have utilized soft X-ray spectro-microscopy in life science and environmental research to explore complex metabolic mechanisms by tracing chemical elements involved in metabolic pathways.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Weifeng Huang, Jianxin Kang, Tingwen Chen, Dawei Pang, Lihua Wang, Hang Wei, Changchun Yang, Dongfeng Zhang, Lin Guo
Summary: Nickel based magnetic nanocrystals have wide applications in magnetic and catalytic fields. Tunable magnetic properties of nickel can be achieved through non-magnetic doping or phase transformation. This study presents a way to control the magnetism of Au@Ni-carbide magnetic materials by adjusting the amount of carbon in the Ni layer, and provides solid evidence for the carbonation process from fcc-Ni to Ni X C instead of phase transformation to hcp-Ni. Further investigation reveals that the magnetism of the hybrids is mainly contributed from the residual fcc-Ni.
Article
Multidisciplinary Sciences
Sunny Gupta, Xiaochen Yang, Gerbrand Ceder
Summary: In this study, the authors investigate the formation mechanism of soft clay-like Li-superionic conductors. By mixing rigid salts and promoting the formation of molecular solid units during anion exchange, they are able to create a material with softness and plasticity. This research provides fundamental insights and a general strategy for creating soft clay-like materials from a mixture of rigid salts.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Applied
Han-Wei Chang, Yu-Cheng Huang, Jeng-Lung Chen, Chi-Liang Chen, Jin-Ming Chen, Da-Hua Wei, Wu-Ching Chou, Chung-Li Dong, Yu-Chen Tsai
Summary: Electrochemistry and X-ray absorption spectroscopy (XAS) were used to evaluate the capacitive performance and electronic structure of MnO2/reduced graphene oxide (RGO) as a supercapacitor. The specific capacitance of MnO2/RGO increased with the growth time, and the contributions to the capacitance were from electrochemical double-layer capacitance and pseudocapacitance.
Article
Chemistry, Analytical
Yasuji Muramatsu, Kae Hiramatsu, Kyoka Maee, Kaoru Sakamoto
Summary: A newly developed heating system for in situ XANES measurements in the soft X-ray region of bulk samples has been installed in BL10 at NewSUBARU. The system utilizes Joule heating to heat various bulk samples up to 250 degrees Celsius. The in situ XANES spectra of heated sugars successfully observe the thermal transformation of sucrose molecules and their hydrogen bonds.
ANALYTICAL SCIENCES
(2022)
Article
Chemistry, Physical
Cornelia Streeck, Daniel Groetzsch, Jan Weser, Andreas Nutsch, Wolfgang Malzer, Burkhard Beckhoff, Birgit Kanngiesser, Ioanna Mantouvalou
Summary: A gas cell has been developed for in-situ measurements of Volatile Organic Compounds (VOCs) and their adsorption behavior on different surfaces. The cell utilizes X-ray Fluorescence (XRF) and X-ray Absorption Fine-Structure (XAFS) spectroscopy, and is designed to efficiently excite and detect low-Z elements such as carbon, oxygen, or nitrogen. The cell offers two measurement modes, surface mode and transmission mode, enabling the study of adsorption and gaseous samples simultaneously. Proof-of-principle experiments were conducted to demonstrate the cell's flexibility and versatility, using ethanol as one of the most abundant VOCs.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Chunyang Zhang, Haytham Eraky, Shunquan Tan, Adam Hitchcock, Drew Higgins
Summary: In this study, a microfluidic-enabled electrochemical device was used in combination with in situ scanning transmission soft X-ray microscopy (STXM) to investigate electrochemically active nanomaterials. Detailed information about the changes in morphology and chemical structure of the catalytic nanoparticles under different potentials was obtained. The results revealed the gradual conversion of Cu(I) to Cu(0) as the applied potential became more cathodic, with different reaction rates and potentials for particles of different sizes.
Article
Chemistry, Physical
Beatriz Barata, Christele Legens, Elodie Devers, Olivier Delpoux, Laurent Barthe, Olga Roudenko, Valerie Briois
Summary: This paper describes and validates two cells designed to monitor the transformation of Mo based oxidic species during the preparation steps of a single hydrodesulfurization catalyst. The transformations occur during impregnation/maturation and drying. The in situ quick-EXAFS monitoring of the preparation steps provides quantitative results of Mo-speciation. Ex situ Raman spectroscopy is used as a complement. A two-step drying mechanism is proposed to explain the evolution of Mo-speciation during in situ drying.
Article
Chemistry, Physical
Rachita Rana, Fernando D. Vila, Ambarish R. Kulkarni, Simon R. Bare
Summary: X-ray absorption spectroscopy is a key technique for probing the structure and properties of catalytic materials. However, data interpretation can be time-consuming. Recent developments and the application of data science tools can improve the speed, accuracy, and reliability of interpretation.
Article
Chemistry, Analytical
Bruna F. Baggio, Yvonne Grunder
Summary: This article reviews the progress in material studies using X-ray techniques from an electrochemistry perspective, focusing on in situ/in operando surface X-ray scattering, X-ray absorption spectroscopy, and the combination of both methods. Key examples of in situ and in operando investigation of liquid-solid and liquid-liquid interfaces are presented. The article highlights the importance of X-ray scattering and spectroscopy in understanding electrocatalysis, electrodeposition, and battery materials, and discusses recent developments in the field.
ANNUAL REVIEW OF ANALYTICAL CHEMISTRY, VOL 14, 2021
(2021)
Review
Chemistry, Physical
Benjamin Rotonnelli, Marie-Sophie Dias Fernandes, Fabrice Bournel, Jean-Jacques Gallet, Benedikt Lassalle-Kaiser
Summary: Water electrolysis for hydrogen production provides a convenient and carbon-free option to regulate the intermittency of renewable energy sources. Efficient catalysts based on noble metals are currently used for large-scale production, but efforts are being made to reduce catalyst usage while maintaining their efficiency. Fundamental studies on catalyst structure, reaction intermediates, and failure modes support these efforts. Synchrotron-based techniques, such as X-ray photoelectron and X-ray absorption spectroscopies, can provide valuable information during the reaction. This article gives an overview of these techniques and their application to water electrolysis.
CURRENT OPINION IN ELECTROCHEMISTRY
(2023)
Article
Materials Science, Ceramics
Alexander W. Auner, Mark A. Burton, Lauren A. Nagel, Jonathan C. Crowhurst, David G. Weisz, Kimberly B. Knight
Summary: Different cerium oxides can be formed in high-temperature laser experiments by varying the availability of oxygen and the use of different laser heating methods. X-ray diffraction and Raman spectroscopy suggest the formation of a low structural order Ce2O3/CeO2 mixed structure using pulsed laser ablation in a 1% O2 atmosphere. Crystalline A-type Ce2O3 is formed near the point of laser impingement when using continuous wave laser heating in a 1% O2 environment. The Raman spectrum of Ce218O3 is reported for the first time through experiments conducted with 18O2.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Correction
Chemistry, Physical
Chang Liu, Jin Qian, Yifan Ye, Hua Zhou, Cheng-Jun Sun, Colton Sheehan, Zhiyong Zhang, Gang Wan, Yi-Sheng Liu, Jinghua Guo, Shuang Li, Hyeyoung Shin, Sooyeon Hwang, T. Brent Gunnoe, William A. Goddard, Sen Zhang
Article
Chemistry, Multidisciplinary
Lena Meyniel, Cedric Boissiere, Natacha Krins, Sophie Carenco
Summary: In this study, thin films of lanthanide oxysulfide were developed that are compatible with flexible substrates and retain the robustness advantages of inorganic compounds. The films, made using a low-temperature dip coating method, maintained the optical quality of the materials. The thickness of the films could be adjusted in a wide range, and thermal treatment was optimized to remove organic ligands while preserving the integrity of the nanoparticles.
Article
Instruments & Instrumentation
Eli Diego Kinigstein, Christopher Otolski, Guy Jennings, Gilles Doumy, Donald A. Walko, Xiaobing Zuo, Jinghua Guo, Anne Marie March, Xiaoyi Zhang
Summary: Laser pump X-ray Transient Absorption (XTA) spectroscopy has been enhanced with two new XTA data acquisition techniques: HRR-XMP and AXMP. HRR-XMP utilizes high repetition rate laser to increase data collection efficiency at each time delay. AXMP uses a frequency mismatch between laser and x-ray pulses to acquire XTA data at flexible pump-probe time delays. Both techniques have been successfully demonstrated in measuring laser-induced spectral dynamics of aqueous solutions of Fe(CN)(6)(4-) and [Fe-II(bpy)(3)](2+).
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Chemistry, Multidisciplinary
Harini Gunda, Keith G. Ray, Leonard E. Klebanoff, Chaochao Dun, Maxwell A. T. Marple, Sichi Li, Peter Sharma, Raymond W. Friddle, Joshua D. Sugar, Jonathan L. Snider, Robert D. Horton, Brendan C. Davis, Jeffery M. Chames, Yi-Sheng Liu, Jinghua Guo, Harris E. Mason, Jeffrey J. Urban, Brandon C. Wood, Mark D. Allendorf, Kabeer Jasuja, Vitalie Stavila
Summary: Metal boride nanostructures have great potential for hydrogen storage applications. However, their synthesis is challenging due to high surface energy, strong bonding, and difficult surface termination. Mechanochemical exfoliation of magnesium diboride in zirconia produces ultrathin MgB2 nanosheets with high yield. High-pressure hydrogenation and dehydrogenation of these nanosheets reveal a hydrogen capacity 50 times larger than bulk MgB2. The enhancement is attributed to defective sites created by ball-milling and incomplete Mg surface coverage. The exfoliation and creation of ultrathin layers offer a promising direction for high-capacity hydrogen storage.
Article
Computer Science, Information Systems
Jingyao Wang, Jinghua Guo, Yugong Luo, Keqiang Li, Huaqing Zheng
Summary: Due to environmental and physical factors, the C-V2X wireless communication network connection is prone to intermittent interruptions. This can lead to deterioration in the performance of vehicle platooning, as the vehicles are unable to receive necessary information. To address this issue, a robust control method based on the intermittent information connection of the leading vehicle through the C-V2X communication network is proposed. The designed platoon control strategy, based on the mode-dependent average dwell time method, improves conservatism and flexibility compared to the average dwell time method. The method is also applicable to various communication topologies, and its effectiveness is verified through simulation.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Parham Pirayesh, Karnpiwat Tantratian, Maedeh Amirmaleki, Feipeng Yang, Enzhong Jin, Yijia Wang, Lyudmila V. Goncharova, Jinghua Guo, Tobin Filleter, Lei Chen, Yang Zhao
Summary: Metal anodes are highly desirable for next-generation batteries due to their high capacity and low potential. However, challenges such as dendrite growth and volume change hinder their practical applications. This study demonstrates the use of organic and inorganic hybrid interfaces to achieve stable electrochemical performance for Li- and Na-metal anodes. The optimized thicknesses of the nanoalloy interfaces differ for Li- and Na-metal anodes, and the mechanical stability of the interfaces influences the electrochemical performance. This research establishes a fundamental understanding and connection between mechanical properties and electrochemical performance for alkali-metal anodes.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Wei Guo, Chaochao Dun, Matthew A. Marcus, Victor Venturi, Zack Gainsforth, Feipeng Yang, Xuefei Feng, Venkatasubramanian Viswanathan, Jeffrey J. Urban, Chang Yu, Qiuyu Zhang, Jinghua Guo, Jieshan Qiu
Summary: Over the past decade, the development of layered-hydroxide-based self-supporting electrodes has faced limitations due to the low active mass ratio. However, this study breaks the intrinsic limit by engineering F-substituted beta-Ni(OH)(2) plates with a sub-micrometer thickness, achieving a superhigh mass loading on the carbon substrate. Through theoretical calculation and analysis, it is found that NH4+ and F- synergistically modulate the sub-micrometer-thickness 2D plates, leading to promising applications in energy storage.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Guanghui Feng, Shibin Wang, Shenggang Li, Ruipeng Ge, Xuefei Feng, Junwei Zhang, Yanfang Song, Xiao Dong, Jiazhou Zhang, Gaofeng Zeng, Qiang Zhang, Guijun Ma, Yi-De Chuang, Xixiang Zhang, Jinghua Guo, Yuhan Sun, Wei Wei, Wei Chen
Summary: Using sunlight and a graphene/SiC catalyst, we achieved a high selectivity of>99% for ethanol production from CO2 through artificial photosynthesis. The CO2 conversion rate reached up to 17.1 mmol g(cat)(-1) h(-1) with sustained performance. Experimental and theoretical investigations revealed that the optimal interfacial layer between SiC substrate and graphene overlayer facilitated efficient electron transfer and CO2 to C2H5OH conversion.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Eoghan Rattigan, Sigmund Jensen, Zhaozong Sun, Miguel Angel Nino, Sofia O. Parreiras, Cristina Martin-Fuentes, Juan Carlos Martin Romano, David Ecuja, Carlos Escudero, Ignacio J. Villar-Garcia, Stefan Wendt, Jonathan Rodriguez-Fernandez, Jeppe V. Lauritsen
Summary: This study investigates the surface structure and spectroscopic features of varying submono-layer coverages of CoO supported on Pt(111) under CO oxidation conditions using operando ambient pressure scanning tunneling microscopy and ambient pressure X-ray photoelectron spectroscopy. The results reveal that the cobalt oxide ultrathin film dewets into nanoparticles with a Co3O4-like structure upon temperature increase during the CO oxidation reaction.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Remi F. Andre, Alberto Palazzolo, Cyprien Poucin, Francois Ribot, Sophie Carenco
Summary: This study describes the organocatalyzed hydrosilylation reaction of benzaldehyde with phenylsilane using a phosphine as a catalyst. The solvent polarity significantly influenced the activation of phenylsilane, with the highest conversions obtained in acetonitrile and propylene carbonate. The best results were achieved with linear trialkylphosphines as catalysts, and the hydrosilylation products were identified using heteronuclear H-1-Si-29 NMR spectroscopy.
Article
Nanoscience & Nanotechnology
Marco A. H. Vogt, Alisson S. Thill, Livia P. Matte, Carlos Escudero, Fabiano Bernardi
Summary: CeO2-x (0 < x < 0.5) nanoparticles are widely used in high temperature applications. In situ XRD measurements were conducted to investigate the phase transition of CeO2-x nanoparticles exposed to a CO atmosphere at 900 degrees C. The results reveal the presence of fluorite and Cu2Se-like phases at this temperature. The Cu2Se-like phase exhibits a negative thermal expansion coefficient due to O diffusion, allowing for tunable thermal expansion coefficient of CeO2-x nanoparticles.
ACS APPLIED NANO MATERIALS
(2023)
Article
Philosophy
Jinghua Guo
Summary: The International Council on Monuments and Sites (ICOMOS) believes that heritage, both natural and cultural, plays a fundamental role in achieving the United Nations Sustainable Development Goals (SDGs). This paper examines the Liangzhu cultural heritage in Hangzhou, China, arguing that cultural heritage is a unique form of living narrative. It emphasizes the importance of cultural heritage narratives in global sustainable development, highlighting examples such as the cross-media development of the Liangzhu site and the integration of 5G technology in Hangzhou as a model for sustainable urban development.
CULTURA-INTERNATIONAL JOURNAL OF PHILOSOPHY OF CULTURE AND AXIOLOGY
(2023)
Article
Chemistry, Physical
Jing-Hua Guo, Hong-Bo Wang, Hai-Ying Liu, Gang Chen, Ting-Ting Cao
Summary: In this study, theoretical models were constructed by incorporating Fe-TCPP and Fe-(mIM)(n) (n = 2,3,4) active sites into hole-graphene and their structural stability was assessed through molecular dynamics simulations. The oxygen reduction reaction (ORR) mechanism and the effects of spatial confinement and ligands were systematically investigated using DFT calculations. The analysis revealed that Fe-TCPP and Fe-(mIM)(4) exhibit good catalytic activity. Additionally, the introduction of confinement effect (5-14 angstrom) demonstrated its influence on catalytic activity, with the lowest overpotential observed at an axial space of 8 angstrom for Fe-TCPP and 9 angstrom for Fe-(mIM)(4). Four ligands (bpy, pya, CH3, and bIm) were selected to explore their impact on the catalytic activity of Fe-TCPP, and modifications with bpy, pya, and bIm_N resulted in a decrease of 26-31% in overpotential. The best catalytic system identified in this work was Fe-TCPP_pya, which occupied the top position in the volcano plot.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Leah R. Filardi, Feipeng Yang, Jinghua Guo, Coleman X. Kronawitter, Ron C. Runnebaum
Summary: Carbon dioxide-assisted coupling of methane can chemically upgrade greenhouse gases and natural gas components to produce ethylene and syngas. The study focuses on the characterization of bifunctional oxide systems to understand the active sites and their roles in the reaction. The introduction of Ca onto a ZnO surface improves the catalytic production of C-2 species.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Review
Multidisciplinary Sciences
Feipeng Yang, Xuefei Feng, Zengqing Zhuo, Lauren Vallez, Yi-Sheng Liu, Scott A. A. McClary, Nathan T. T. Hahn, Per-Anders Glans, Kevin R. R. Zavadil, Jinghua Guo
Summary: Calcium is a promising candidate for future energy storage due to its abundance and higher volumetric capacity compared to lithium-ion batteries. Despite initially receiving less attention, the discovery of Ca(BH4)(2) as an electrolyte has sparked interest in calcium-ion batteries. Computational methods and experimental approaches have played a crucial role in improving battery performance. Understanding the dynamic solvation process of Ca2+ at the electrode/electrolyte interface is essential for designing a compatible electrolyte. This comprehensive review covers the solvation study, multi-ion strategy, and in situ advanced characterization.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
