Article
Chemistry, Physical
Reihaneh Amirbeigiarab, Olaf M. Magnussen
Summary: This study investigates the surface restructuring and adsorption layer properties of Ag-decorated Cu electrocatalysts. The results show that Ag-covered Cu electrodes undergo island restructuring and new island formation in carbonate solution, accompanied by a significant reduction in surface mobility. High-resolution imaging reveals a highly disordered molecular adsorption layer on the Ag-decorated Cu surface, contrasting with Ag-free Cu electrodes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Reihaneh Amirbeigiarab, Olaf M. Magnussen
Summary: We present a study on AgCu electrodes using in situ scanning tunneling microscopy. The electrodes were prepared by electrodepositing submonolayer Ag on Cu(100) in 0.1 M H2SO4, resulting in monolayer islands with a hexagonal quasi-Ag(111) atomic lattice. Upon exchanging the solution to 0.1 M KHCO3, the Ag islands undergo restructuring, the nucleation and growth of new islands, and a reduction in surface mobility. Furthermore, disorder in the molecular adlayer is observed, suggesting that Ag redispersion on Cu electrocatalysts can occur even without CO2 reduction.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Marco Turano, Marc Walker, Federico Grillo, Chiara Gattinoni, Gregory Hunt, Paul Kirkman, Neville V. Richardson, Christopher J. Baddeley, Giovanni Costantini
Summary: The study reveals that benzotriazole adsorbed on the copper surface changes its orientation with increasing molecular coverage, ultimately forming a self-limiting monolayer. CuBTA and Cu(BTA)2 metal-organic complexes are identified as the fundamental building blocks of this monolayer.
Article
Chemistry, Physical
Juan Carlos Martin Romano, Pablo Casado Aguilar, Amadeo L. Vazquez de Parga, Manuela Garnica, Oscar Rodriguez de la Fuente, Juan M. Rojo, Miguel Angel Nino
Summary: We report on the properties of thin films of L-dialanine and compare them to those of L-alanine on Cu(100) surfaces. The first dialanine monolayer consists of whole neutral molecules in a non-zwitterionic state, while the second and further layers are zwitterionic and readily desorb even at room temperature. The ordering of the dialanine overlayer is influenced by the rearrangements of the substrate atoms around dislocations.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Sebastian Kunze, Liviu C. Tanase, Mauricio J. Prieto, Philipp Grosse, Fabian Scholten, Lucas de Souza Caldas, Dennis van Voerden, Thomas Schmidt, Beatriz Roldan Cuenya
Summary: The oxidation of Cu(100) and Cu(111) surfaces through exposure to oxygen plasma was studied, revealing differences in the oxide species and morphology formed on substrates with different orientations. These findings illustrate the potential for tailoring the oxidation state, structure, and morphology of metallic surfaces through oxygen plasma treatments.
Article
Chemistry, Multidisciplinary
Hongjiao Li, Yunchang Liang, Wenbo Ju, Oliver Schneider, Ulrich Stimming
Summary: This study utilized electrochemical scanning tunneling microscopy (EC-STM) to monitor the surface evolution of a silver electrode in two different electrochemical environments. The results showed that the silver surface transformed from a polycrystalline structure to a well-defined surface arrangement in both an aqueous sodium hydroxide solution and an ionic liquid. Additionally, cathodic annealing of the polycrystalline silver was found to be a cheap and reliable method to obtain quasi-ordered crystal surfaces.
Article
Chemistry, Multidisciplinary
Meng Li, Matthew T. Curnan, Wissam A. Saidi, Judith C. Yang
Summary: Understanding the influence of defects on oxidation is crucial for the applications of nano-oxides in catalysis, electronics, and corrosion. This study investigates the uneven surface oxidation induced by surface steps on copper materials using atomic-scale in situ environmental transmission electron microscopy experiments. The results provide mechanistic explanations for the observed formation site preferences, which vary with surface orientation and oxygen concentration, based on Ehrlich-Schwobel barrier differences for oxygen diffusion on stepped surfaces.
Article
Chemistry, Physical
Masamichi Yamada, Kazuma Yagyu, Shinya Ohno, Takushi Iimori, Kan Nakatsuji, Fumio Komori
Summary: Nitrogen adsorption on a Cu(001) surface forms a grid-like nanopattern with square c(2 x 2) N-adsorbed islands of the size 5nm x 5nm aligned along [100] and [010] directions. Short bright lines running in [110] directions appear on patch edges only when the grid pattern approaches completion.
Article
Chemistry, Applied
Ling Zhou, Yingying Li, Yuxuan Lu, Shuangyin Wang, Yuqin Zou
Summary: In this study, the pH dependence of product selectivity in the electrocatalytic hydrogenation of furfural on Cu electrodes was systematically investigated. Under acidic conditions, a high proportion of the hydrogenolysis product was obtained, while under partial alkaline conditions, furfuryl alcohol was directly hydrogenated.
CHINESE JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Physical
Indiras Khatri, Ehsan H. Sabbar, Yunsic Shim, Jacques G. Amar
Summary: The study shows that growth of Cu on a biaxially strained Cu(100) substrate leads to different diffusion mechanisms and island morphologies under different strains. Factors such as temperature, coverage, and annealing also play a role in shaping the islands.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Multidisciplinary Sciences
Jing Li, Xiaoxia Chang, Haochen Zhang, Arnav S. Malkani, Mu-jeng Cheng, Bingjun Xu, Qi Lu
Summary: This study investigates the kinetics of CO reduction reaction without mass transport limitation using a gas-diffusion electrode and explores the dependence of copper surface speciation on electrolyte pH.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Jia-Xin Zhu, Jia-Bo Le, Marc T. M. Koper, Katharina Doblhoff-Dier, Jun Cheng
Summary: This study investigates the interfacial water structure at different coverages of OH on the Pt(100)/water interface using ab initio molecular dynamics. The results suggest that the structure of interfacial water is highly sensitive to the adsorption site of OH and that there is a correlation between the structure of water and that of OH.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Review
Chemistry, Multidisciplinary
Weiran Zheng, Lawrence Yoon Suk Lee
Summary: Electrocatalysis is crucial for addressing environmental and energy problems, and understanding its processes is essential for designing electrocatalysts. Scanning tunneling microscopy (STM), which enables atomic-level surface imaging, is a valuable tool in electrocatalytic research.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Review
Chemistry, Inorganic & Nuclear
Lei Xie, Chaoqin Huang, Zhaofeng Liang, Hongbing Wang, Zheng Jiang, Fei Song
Summary: Heterogeneous catalysis occurring at solid interfaces is crucial in both industrial chemical production and fundamental research. To fully understand the dynamic evolution of surface morphology and composition during realistic reaction conditions, conventional scanning tunneling microscopy (STM) has been combined with high pressure cell and electrochemical cell to form high pressure STM (HP-STM) and electrochemical STM (EC-STM) respectively. These techniques allow for in-situ/operando characterization with atomic resolution at solid-gas and solid-liquid interfaces. By correlating surface structures with catalytic performance, these techniques provide insights into rational catalyst design and optimization.
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Zhi-Zheng Wu, Xiao-Long Zhang, Zhuang-Zhuang Niu, Fei-Yue Gao, Peng-Peng Yang, Li-Ping Chi, Lei Shi, Wen-Sen Wei, Ren Liu, Zhi Chen, Shaojin Hu, Xiao Zheng, Min-Rui Gao
Summary: The study demonstrates that oxide-derived copper crystals enclosed by Cu(100)/Cu(111) interfaces can efficiently reduce CO2 to multicarbon products with high Faradaic efficiency. Combining experimental and computational studies reveals that these interfaces have a favorable local electronic structure that enhances catalytic activity.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Physics, Applied
Hisayoshi Matsushima
JAPANESE JOURNAL OF APPLIED PHYSICS
(2020)
Article
Electrochemistry
Hisayoshi Matsushima, Hitomi Takahashi, Tatsuki Suzuki, Mikito Ueda, Iwao Mogi
ELECTROCHEMISTRY COMMUNICATIONS
(2020)
Article
Chemistry, Physical
Risako Tanii, Ryota Ogawa, Hisayoshi Matsushima, Mikito Ueda, Richard Dawson
Summary: This study investigates deuterium separation using two types of AFCs with different catalysts and finds a mass transportation limitation at Ru catalyst leading to a decrease in voltage. The slow reaction rate of D-2 gas on Ru catalyst is supported by AC impedance measurements. Experimental results show that deuterium is diluted with Pt catalyst but concentrated with Ru catalyst, possibly due to differences in adsorption energy on the catalyst surface.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Electrochemistry
Go Kamesui, Kei Nishikawa, Hisayoshi Matsushima, Mikito Ueda
Summary: Investigations into the dissolution of a copper anode in a magnetic field have shown that the increase in surface concentration caused by dissolution can be remarkably suppressed, while the thickness of the diffusion layer is barely affected. These results support the hypothesis that mass transport is enhanced in a magnetic field.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
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)
Article
Electrochemistry
Tomoki Hirai, Hisayoshi Matsushima, Mikito Ueda
Summary: The co-electrodeposition of Al and Sc ions was investigated in LiCl-KCl molten salt at 723 K, showing the formation of Al-Sc alloy electrodeposits. EDS analysis revealed the contents of Al and Sc in the deposits, while the X-ray diffraction pattern matched with that of Al and Al3Sc.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Haruka Sato, Hisayoshi Matsushima, Mikito Ueda, Hiroshi Ito
Summary: Water electrolysis (WE) is a key technology for a decarbonized society and is essential for hydrogen isotope separation for a future fusion reactor. This study focused on deuterium (D) separation using anion exchange membrane WE (AEMWE) and compared the results with proton exchange membrane WE (PEMWE). The separation effect was found to increase with decreasing water stoichiometric ratio, l, and AEMWE showed better performance compared to PEMWE.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Mashu Mita, Hisayoshi Matsushima, Mikito Ueda, Hiroshi Ito
Summary: In this study, in-situ HS-AFM observation was used to investigate the nucleation and growth of nanobubbles during water electrolysis. The study found that the evolution of hydrogen and oxygen nanobubbles exhibited different processes.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Electrochemistry
Rei Esaki, Yohei Yasuda, Norito Kotani, Hisayoshi Matsushima, Mikito Ueda
Summary: In this study, the adsorption and desorption processes of polyethylene glycol on a gold single crystal substrate were investigated using high speed atomic force microscopy. The study showed that the morphology of adsorption and the dissolution process of PEG changed significantly with the applied potential.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Electrochemistry
Junji Nunomura, Hisayoshi Matsushima, Yoshihiko Kyo, Yoichi Kojima, Mikito Ueda
Summary: The dissolution behaviors of Al-Cu alloys in EmImCl-AlCl3 ionic liquid were investigated, and it was found that controlling the anodic dissolution potential can significantly improve the purity of electrolytically refined Al.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Satoshi Yasuda, Hisayoshi Matsushima, Kenji Harada, Risako Tanii, Tomo-o Terasawa, Masahiro Yano, Hidehito Asaoka, Jessiel Siaron Gueriba, Wilson Agerico Dino, Katsuyuki Fukutani
Summary: In this study, a hydrogen/deuterium (H/D) separation system using a polymer electrolyte membrane electrochemical hydrogen pumping (PEM-ECHP) was developed. The system showed high separation factor and the mechanism behind the separation was analyzed. These findings contribute to understanding the origin of graphene's isotope separation ability and provide guidance for the development of economical hydrogen isotope enrichment systems.
Article
Chemistry, Physical
Koichiro Furusawa, Toranosuke Nago, Mikito Ueda, Hisayoshi Matsushima
Summary: Hydrogen isotopes are a valuable source of hydrogen energy, and their separation can be achieved using polymer electrolyte fuel cells (PEFC). This study shows that D separation can be performed using a PEFC, and the fuel-cell reaction enhances the separation process by promoting vapor-phase catalytic exchange. The results demonstrate the synergistic effect of vapor-phase catalytic exchange and PEFC on D separation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Go Kamesui, Kei Nishikawa, Mikito Ueda, Hisayoshi Matsushima
Summary: Understanding the mechanisms of electrodeposition and dissolution of Li metal is crucial for controlling the morphological variations of Li metal anodes. The decomposition of solvent and anions during electrodeposition and dissolution processes can cause changes in the morphology and solid electrolyte interphase layer thickness of Li. Mass transfer is also correlated to the progress of electrode reactions.
ACS ENERGY LETTERS
(2022)
Article
Chemistry, Physical
Akinori Miki, Kei Nishikawa, Go Kamesui, Hisayoshi Matsushima, Mkito Ueda, Michel Rosso
Summary: The study demonstrates that the concentration distribution of lithium ions in a solvated ionic liquid has significant effects on both battery voltage and electrolyte viscosity, which are induced by electrode reactions.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Review
Chemistry, Physical
Yvonne Grunder, Christopher A. Lucas
CURRENT OPINION IN ELECTROCHEMISTRY
(2020)
Article
Chemistry, Physical
Sergey Yu. Ketkov, Sheng-Yuan Tzeng, Elena A. Rychagova, Anton N. Lukoyanov, Wen-Bih Tzeng
Summary: Metallocenes, including methylcobaltocene, play important roles in various fields of chemistry. The ionization energy and vibrational structure of (Cp ')(Cp)Co can be influenced by introducing methyl substituents. The mass-analyzed threshold ionization spectrum and DFT calculations provide accurate information about the properties and transformations of (Cp ')(Cp)Co.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Review
Chemistry, Physical
Qifeng Mu, Jian Hu
Summary: Polymer mechanochemistry has experienced a renaissance due to the rapid development of mechanophores and principles governing mechanochemical transduction or material strengthening. It has not only provided fundamental guidelines for converting mechanical energy into chemical output, but also found applications in engineering and smart devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Da Hye Yang, Francesco Ricci, Fredrik L. Nordstrom, Na Li
Summary: Through systematic evaluation of the oiling-out behavior of procaine, we identified both stable and metastable liquid-liquid phase separation, and established phase diagrams to assist in rational selection of crystallization strategies.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Vikki Anand Varma, Simmie Jaglan, Mohd Yasir Khan, Sujin B. Babu
Summary: Designing engineering structures like nanocages, shells, and containers through self-assembly of colloids is a challenging problem. This work proposes a simple model for the subunit, which leads to the formation of monodispersed spherical cages or containers. The model with only one control parameter can be used to design cages with the desired radius.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Hainan Jiang, Yaolong He, Xiaolin Li, Zhiyao Jin, Huijie Yu, Dawei Li
Summary: The cycling lifespan and coulombic efficiency of lithium-ion batteries are crucial for high C-rate applications. The Li-ion concentration plays a crucial role in determining the mechanical integrity and structural stability of electrodes. This study focuses on graphite as the working electrode and establishes an experimental system to investigate the mechanical properties of composite graphite electrode at different C-rates. Considering the effect of Li-ion concentration in stress analysis is found to be significant.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Zhiye Wang, Yunchuan Li, Mingjun Sun
Summary: This study investigates the influence of intramolecular pi-pi interactions on the electronic transport capabilities of molecules. By designing and analyzing three pi-conjugated molecules, the researchers observe that different pi-conjugated structures have varying effects on electron transport. The findings provide a theoretical foundation for designing single-molecule electronic devices with multiple electron channels based on intramolecular pi-pi interactions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Yuandong Xu, Haoyang Feng, Chaoyang Dong, Yuqing Yang, Meng Zhou, Yajun Wei, Hui Guo, Yaqing Wei, Jishan Su, Yingying Ben, Xia Zhang
Summary: Hollow MoS2 cubes and spheres were successfully synthesized using a one-step hydrothermal method with the hard template method. The hollow MoS2 cubes exhibited higher specific capacitance and energy density compared to the hollow MoS2 spheres. The symmetrical supercapacitors assembled with these hollow structures showed good performance and high capacity retention after multiple cycles. These findings suggest that controlling the pore structure and surface characteristics of MoS2 is crucial for enhancing its electrochemical properties.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Ainhoa Oliden-Sanchez, Rebeca Sola-Llano, Joaquin Perez-Pariente, Luis Gomez-Hortiguela, Virginia Martinez-Martinez
Summary: The combination of photoactive molecules and inorganic structures is important for the development of advanced materials in optics. In this study, bulky dyes were successfully encapsulated in a zeolitic framework, resulting in emission throughout the visible spectrum.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Miaomiao Zhang, Cunyuan Pei, Qiqi Xiang, Lintao Liu, Zhongxu Dai, Huijuan Ma, Shibing Ni
Summary: The design of a solid electrolyte interphase (SEI) plays a crucial role in improving the electrochemical performance of anode materials. In this study, lithium difluoro(oxalate)borate (LiDFOB) is used as an electrolyte additive to form a protective SEI film on Li3VO4 (LVO) anodes. The addition of LiDFOB results in a dense, uniform, stable, and LiF-richer SEI, which enhances the Li-ion storage kinetics. The generated SEI also prevents further decomposition of the electrolyte and maintains the morphology of LVO anodes during charge/discharge processes. This work demonstrates the effectiveness of LiDFOB as a multi-functional additive for LiPF6 electrolytes and provides insights into SEI construction for high-performance LVO anodes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
B. V. Andryushechkin, T. V. Pavlova, V. M. Shevlyuga
Summary: The atomic structure of the Ag(111)-p(4 x 4)-O phase was reexamined and two phases with the same periodicity were discovered. It was demonstrated that the accepted Ag6 model is incompatible with high-resolution oxygen-sensitive STM images.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
S. L. Romo-Avila, D. Marquez-Ruiz, R. A. Guirado-Lopez
Summary: In this study, we used density functional theory (DFT) calculations to investigate the interaction between model graphene oxide (GO) nanostructures and chlorine monoxide ClO. We aimed to understand the role of this highly oxidizing species in breaking C-C bonds and forming significant holes on GO sheets. Our results showed that C-C bonds in a single graphene oxide sheet can be broken through a simple mechanism involving the dissociation of two chemically attached ClO molecules. The formation of carbonyl groups and holes on the GO surface was also observed. This study provides important insights into the degradation of carbon nanotubes and the stability of GO during the myeloperoxidase (MPO) catalytic cycle.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Alberto Garcia-Fernandez, Birgit Kammlander, Stefania Riva, Hakan Rensmo, Ute B. Cappel
Summary: In this study, the X-ray stability of five different lead halide perovskite compositions (MAPbI3, MAPbCl3, MAPbBr3, FAPbBr3, CsPbBr3) was investigated using photoelectron spectroscopy. Different degradation mechanisms and resistance to X-ray were observed depending on the crystal composition. Overall, perovskite compositions based on the MA+ cation were found to be less stable than those based on FA+ or Cs+. Metallic lead formation was most easily observed in the chloride perovskite, followed by bromide, and very little in MAPbI3. Multiple degradation processes were identified for the bromide compositions, including ion migration, formation of volatile and solid products, as well as metallic lead. CsBr was formed as a solid degradation product on the surface of CsPbBr3.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Timofei Rostilov, Vadim Ziborov, Alexander Dolgoborodov, Mikhail Kuskov
Summary: The shock-loading behavior of nanomaterials is investigated in this study. It is found that shock compaction waves exhibit a distinct two-step structure, with the formation of faster precursor waves that travel ahead of the main compaction waves. The complexity of the shock Hugoniot curve of the tested nanomaterial is described, and the effect of initial porosity on the compressed states is demonstrated.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Sergey S. Nikitin, Alexander D. Koryakov, Elizaveta A. Antipinskaya, Alexey A. Markov, Mikhail V. Patrakeev
Summary: The stability of La1/3Sr2/3Fe1-xMnxO3-delta, a perovskite-type oxide, under reducing conditions is dependent on the manganese content. Increasing the manganese content leads to a decrease in stability. The behavior of iron and manganese in the oxide shows distinct differences, which can be attributed to the difference in the enthalpy of oxidation reactions. Additionally, the change in the La/Sr ratio affects the concentration of iron and manganese ions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Mosayeb Naseri, Shirin Amirian, Mehrdad Faraji, Mohammad Abdur Rashid, Maicon Pierre Lourenco, Venkataraman Thangadurai, D. R. Salahub
Summary: Inspired by the successful transfer of freestanding ultrathin films of SrTiO3 and BiFeO3, this study assessed the structural stability and investigated the electronic, optical, and thermoelectric properties of a group of two-dimensional perovskite-type materials called perovskenes. The findings revealed that these materials are wide bandgap semiconductors with potential application in UV shielding. Moreover, they exhibit better electrical and thermal conductivity at high temperatures, enabling efficient power generation in thermoelectric devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)