Article
Physics, Multidisciplinary
M. Ya Sushko, S. D. Balika
Summary: We study the role of the electrical double layer in the formation of the quasistatic electrical conductivity of nanosized particle suspensions. By modeling the microstructure of the suspension, we derive general integral relations for the desired conductivity that incorporate the effect of the electrical double layer. The model is demonstrated to accurately describe experimental data for latex suspensions in high ionic strength electrolyte solutions.
Article
Materials Science, Multidisciplinary
Xin Li, Zhen Liu, Zekun Zhou, Haiyang Gao, Guodong Liang, Daniel Rauber, Christopher W. M. Kay, Peng Zhang
Summary: The study found that doping salts with small-sized cations can enhance the electrical conductivity of PEDOT:PSS films by improving crystalline order and p-doped levels. These findings will be beneficial in developing recipes based on PEDOT:PSS/salt composites for printed flexible electronics applications.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Chemistry, Physical
Sheng Han, Fengxian Wu, Wenjing Qin, Huanqi Cao, Liying Yang, Shougen Yin
Summary: In this study, a low-melting point tin-bismuth alloy film combined with a silver layer was used to fabricate inverted planar perovskite solar cells, resulting in a 19.6% improvement in performance compared to the control device. The double-layer electrode structure played a key role in enhancing the efficiency and stability of the device.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Qianlu Zheng, Zachary A. H. Goodwin, Varun Gopalakrishnan, Alexis G. Hoane, Mengwei Han, Ruixian Zhang, Nathaniel Hawthorne, James D. Batteas, Andrew A. Gewirth, Rosa M. Espinosa-Marzal
Summary: This study investigates the influence of water on the performance of electrochemical devices using hydrophilic and hydrophobic ionic liquids as electrolytes. The results show that water uptake slightly reduces the electrochemical stability of ionic liquids and significantly affects the potential of zero charge of graphene. Hydrophilic ionic liquids efficiently screen surface charge, while hydrophobic ones are less efficient. Water uptake also leads to changes in the interfacial layering, which is important for the design of graphene-based electrochemical devices.
Article
Chemistry, Multidisciplinary
Cong Huang, Xin Zhao, Shuang Liu, Yisu Hao, Qunli Tang, Aiping Hu, Zhixiao Liu, Xiaohua Chen
Summary: The research shows that saccharin (Sac) as an electrolyte additive can regulate the electrical double layer (EDL) structure on the zinc anode, forming a unique solid electrolyte interphase (SEI) that effectively modulates zinc deposition behavior and prevents side reactions, thus improving battery performance.
ADVANCED MATERIALS
(2021)
Article
Electrochemistry
Sofia B. Davey, Amanda P. Cameron, Kenneth G. Latham, Scott W. Donne
Summary: This study used step potential electrochemical spectroscopy to characterize the dynamics of charge storage on a planar non-porous glassy carbon electrode in an aqueous electrolyte, revealing diffuse nature of electrolyte charge storage that extends a substantial distance even for concentrated electrolytes. This finding challenges the expected parallel planes of charge for double layer formation at the interface and has implications for the use of porous materials.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Tahani H. Flemban, Taharh Zelai, Q. Mahmood, Assa Aravindh Sasikala Devi, M. Sajjad, M. H. Alhossainy, H. H. Somaily, Abeer Mera, Sarah Alharthi, Mohammed A. Amin
Summary: The study comprehensively investigated the structural, electronic, magnetic, and thermal transport properties of cubic double perovskites Rb(2)Z(Cl/Br)(6) (Z = Ta, W, Re), exploring phenomena such as half metallic ferromagnetism, spin polarization, and thermal transport.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Ruhao Pan, Jianyu Kang, Yutong Li, Zhongshan Zhang, Renfei Li, Yang Yang
Summary: This study proposes a feasible method to prepare MoS2-based plasmonic hybrid systems and systematically investigates the enhancement effect of Ag SPs on the PL emission of MoS2. The results demonstrate that the sandwich-like hybrid system composed of monolayer MoS2 and two layers of Ag SPs with an Al2O3 layer between them achieves the highest PL enhancement.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Jui-Yu Pai, Cheng-Ta Hsieh, Chih-Hung Lee, Jeng-An Wang, Hao-Yu Ku, Chun-Lung Huang, Laurence J. Hardwick, Chi-Chang Hu
Summary: Functionalised polyimide separators with SiO2 nanoparticles enhance mechanical strength, electrolyte uptake capability, and ionic conductivity, improving the performance of electrical double-layer capacitors and lithium-ion batteries. Adding SiO2 NPs helps tailor the properties of the polyimide separator for specific applications, such as high-rate performances and thermal shutdown function.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Multidisciplinary
M. M. Sk, P. Pradhan, B. K. Patra, A. K. Guria
Summary: Electrical double-layer capacitors (EDLCs) could be an alternative solution to meet the increasing demand for power in electric cars and digital electronic devices. The high power density of EDLCs is achieved through the use of porous electrodes that provide a large accessible surface area for ions. Currently, porous carbon-based electrodes are widely used due to their high specific surface area, good electronic conductivity, and reasonable cost. The electrochemical properties of EDLCs are closely related to the chemical and physical properties of carbon materials, particularly activated carbon (AC) is an important electrode material in EDLC applications. The production of AC from inexpensive natural bio-precursors, such as crops and plants, has attracted research interest.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Physical
Long Jiang, Dongmin Li, Xian Xie, Dongdong Ji, Liwei Li, Le Li, Zhangxing He, Bingan Lu, Shuquan Liang, Jiang Zhou
Summary: Zinc-based batteries have gained attention for their cost-effectiveness and safety, but suffer from poor interface stability between the zinc anode and the electrolyte. This review systematically discusses the relationship between interface properties, solvation sheath structure, and the components of the Helmholtz layer, highlighting the possible transport pathway of zinc ions and the structural evolution mechanism of the electrical double layer (EDL) at the interface. The scientific principles for EDL regulation are proposed to inspire future electrolyte and interface design.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Lu-Xuan Wang, Miao Zhang, Chao Sun, Li-Xin Yin, Bin Kang, Jing-Juan Xu, Hong-Yuan Chen
Summary: Single-nanoparticle electrochemistry allows for studying electrochemical behaviors beyond the ensemble system. By directly tracking ion migration dynamics, it was found that the dynamics of electric double layer (EDL) formation deviates from the classical prediction under nanoscale and transient conditions. A new theoretical model was proposed to describe the transient dynamics of EDL formation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Ezzoubair Bendadesse, Anatolii V. Morozov, Artem M. Abakumov, Hubert Perrot, Jean-Marie Tarascon, Ozlem Sel
Summary: In this study, an advanced ac-electrogravimetry method combined with classical electrochemical quartz crystal microbalance (EQCM) was used to investigate the effect of solvent/salt combinations on the structure of the electrical double layer (EDL) formed at the electrolyte/electrode interface (EEI) of LixMoO3. The results provided solid experimental evidence of the direct relationship between the solvation of ions and solvent polarity. This elegant and powerful method can be adopted to improve the engineering of interfaces in electrochemical energy storage devices.
Article
Chemistry, Multidisciplinary
Mahnaz Azimzadeh Sani, Nicholas G. Pavlopoulos, Simone Pezzotti, Alessandra Serva, Paolo Cignoni, Julia Linnemann, Mathieu Salanne, Marie-Pierre Gaigeot, Kristina Tschulik
Summary: Research into the structure of the electrical double-layer is crucial for the progress of sustainable technologies, with new information extracted from platinum and gold nanoparticles. Experimental results show that the charge storage ability of the solid/liquid interface far surpasses traditional model predictions. Molecular dynamics simulations are used to investigate the relationship between the high capacitance and adsorption strength of the water adlayer.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Mahmoud H. M. A. Shibraen, Omar M. Ibrahim, Rabie A. M. Asad, Shuguang Yang, M. R. El-Aassar
Summary: Metal ions can interpenetrate into polysaccharide thin films through interactions with polyacid groups, resulting in CGG/PAA system with maximum metal loading capacity, exhibiting significantly enhanced antibacterial activity with Ag+ loading.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Physics, Multidisciplinary
Zhe Zhang, Yan-Na Chen, Ji Qi, Zhao Zhang, Koji Ohara, Osami Sakata, Zhi-Dong Zhang, Bing Li
Summary: The colossal barocaloric effects and phase transition characteristics of neopentylglycol were studied by high-precision measurement and analysis. It was found that neopentylglycol undergoes a first-order phase transition with thermal hysteresis and asymmetry, completing the transition faster during cooling. The asymmetry was quantitatively characterized by time-resolved x-ray diffraction and was observed to be suppressed at high pressures.
Article
Chemistry, Physical
Akane Suzuki, Masashi Nakamura, Nagahiro Hoshi
Summary: The oxygen reduction reaction (ORR) on low-index planes of Pt3Fe in O-2-saturated 0.1 M HClO4 was studied. It was found that Pt3Fe (111) has 20 times higher ORR activity compared to Pt (111). Furthermore, the ORR activity on low-index planes of Pt3Fe can be further improved by modifying the electrodes with hydrophobic species.
Article
Electrochemistry
Akane Suzuki, Masashi Nakamura, Nagahiro Hoshi
Summary: This study investigated the oxygen reduction reaction (ORR) activity of Pt3Fe on different crystal structures. The results showed that the ORR activity of Pt3Fe varies with different crystal structures and exhibits higher activity than single-crystal Pt electrodes.
ELECTROCHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Keita Okuda, Musa Alaydrus, Nagahiro Hoshi, Ikutaro Hamada, Masashi Nakamura
Summary: This study investigated the structures of H2O, OHad, and Li using infrared spectroscopy and density functional theory calculations. By optimizing the coverage of OHad and Li, a quasi-Electrical Double Layer (EDL) model composed of OHad species interacting with hydrated Li+ on Pt(111) was successfully modeled under ultrahigh vacuum conditions. Modeling the EDL, including the outer Helmholtz plane, is beneficial for identifying the microscopic details of the EDL under electrochemical conditions.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Electrochemistry
Rui Suzuki, Masashi Nakamura, Nagahiro Hoshi
Summary: The oxygen reduction reaction (ORR) on Pt modified with a protonic ionic liquid [MTBD][beti] was studied in 0.1 M perchloric acid solution. The results showed that the ORR activity on Pt(111) modified with [MTBD][beti] was 3.1 times higher than that on unmodified Pt(111), while the ORR was deactivated on modified Pt(100). Additionally, [MTBD][beti] slightly enhanced the ORR activity of the Pt n(111)-(111) planes.
ELECTROCHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Syunnosuke Tanaka, Hiroo Tajiri, Osami Sakata, Nagahiro Hoshi, Masashi Nakamura
Summary: This study investigates the effect of alkali metal cations on the hydrogen evolution reaction (HER) activity of platinum electrodes through in situ surface X-ray diffraction. The results reveal that the interfacial structure of the Pt(110) electrode changes reversibly depending on the electrode potential. In solutions with higher HER activity, a densely packed water layer in the electrical double layer acts as a hydrogen supplier. In solutions with lower HER activity, Cs+ cations hinder water from accessing the surface, resulting in a lower HER activity.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Ibrahima Gueye, Yasuhiro Shirai, Takahiro Nagata, Takashi Tsuchiya, Dhruba B. Khadka, Masatoshi Yanagida, Okkyun Seo, Kenjiro Miyano, Osami Sakata
Summary: An operando hard X-ray photoelectron spectroscopy (HAXPES) study was conducted to analyze the dynamics of ion species in a MAPbI3-xClx solar cell. Experimental core level analysis revealed that a threshold voltage above the open-circuit voltage (VOC) is required for iodide (I-) migration from HaP to adjacent transport layers. The study also demonstrated unidirectional diffusion of I- in AZO/PCBM and its absorption by the Ag layer to form AgI compound. The presence of an ITO layer was found to restrain AgI formation and improve cell performance.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Okkyun Seo, Jaemyung Kim, Jiayi Tang, L. S. R. Kumara, Koji Kimoto, Kazushi Miki, Akifumi Matsuda, Mamoru Yoshimoto, Osami Sakata
Summary: This research focuses on the influence of atomic arrangement on the electrical and catalytic properties of oxide thin films. The atomic arrangement of LiNiO2 thin films was investigated by uniaxial compression and annealing at 600℃ on sapphire substrates. Thin films with a rock-salt structure were grown using pulsed laser deposition method at room temperature. It was observed that the as-grown thin films transformed from a rock-salt to a layered structure after uniaxial compression at 600℃, and the layer thickness of the latter structure increased with increasing uniaxial compression pressure. Uniaxial compression provides a useful tool for oxide thin film research, contributing to the development of new functional oxide materials and adjustment of the atomic ordering of cation materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Analytical
Ryuta Kubo, Masashi Nakamura, Nagahiro Hoshi
Summary: Modification with a protonic ionic liquid containing [7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene (MTBD)] [bis(pentafluoroethanesulfonyl)imide (beti)] improved the cathodic reactions of fuel cells on Pt(1 1 1) and Pt(1 1 0), but deactivated Pt(1 0 0). The study used infrared reflection absorption spectroscopy (IRRAS) to investigate PtOH inhibiting species and the adsorption geometries of [MTBD][beti] on different Pt surfaces. The results showed a decrease in PtOH bands and different adsorption patterns of MTBD and beti on the surfaces, explaining the enhanced activities and deactivation of the Pt surfaces.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Hiroki Minamihara, Kohei Kusada, Tomokazu Yamamoto, Takaaki Toriyama, Yasukazu Murakami, Syo Matsumura, Loku Singgappulige Rosantha Kumara, Osami Sakata, Shogo Kawaguchi, Yoshiki Kubota, Okkyun Seo, Satoshi Yasuno, Hiroshi Kitagawa
Summary: A 4-way flow reactor was used to synthesize ultra-multielement alloy (UMEA) nanoparticles composed of 15 different elements at low temperature. These nanoparticles exhibited high durability and activity for electrochemical alcohol oxidation reactions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Electrochemistry
Syunnosuke Tanaka, Nagahiro Hoshi, Masashi Nakamura
Summary: The hydrogen evolution reaction (HER) on Au with high chemical stability is activated by alloying it with Ni. We evaluated the HER activity of the AuNi surface alloy prepared at different alloying temperatures on single-crystal Au electrodes in 0.05 M H2SO4. The potential cycle, including the region of Ni oxidative dissolution, further enhanced the HER activity by dealloying Ni, and the activity depended on the surface structure of the Au substrate in the following order: AuNi/Au(100).
Article
Materials Science, Ceramics
Shinnosuke Yasuoka, Ryoichi Mizutani, Reika Ota, Takahisa Shiraishi, Takao Shimizu, Shintaro Yasui, Yoshitaka Ehara, Ken Nishida, Masato Uehara, Hiroshi Yamada, Morito Akiyama, Yasuhiko Imai, Osami Sakata, Hiroshi Funakubo
Summary: The thickness dependences of crystal structures and ferroelectric properties were investigated for (Al0.8Sc0.2)N films. The internal structural parameter u decreased with decreasing film thickness. Well-saturated P-r values were obtained for films down to 20 nm in thickness, and the P-r value tended to increase for film thicknesses below 50 nm. The significantly large P-r values of these films were in good agreement with the theoretically calculated predictions based on the crystal anisotropy, u parameter.
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2022)
Article
Chemistry, Multidisciplinary
Yuto Maruta, Kohei Kusada, Dongshuang Wu, Tomokazu Yamamoto, Takaaki Toriyama, Syo Matsumura, Okkyun Seo, Satoshi Yasuno, Shogo Kawaguchi, Osami Sakata, Yoshiki Kubota, Hiroshi Kitagawa
Summary: Platinum-group-metal quinary RuRhPdIrPt alloy nanoparticles were synthesized and their crystal and electronic structures were investigated. The lattice constant changed linearly with composition, while the d-band centre changed nonlinearly. Furthermore, the catalytic activity of these alloy nanoparticles for the hydrogen evolution reaction was found to be unrelated to their d-band centre.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Dongshuang Wu, Kohei Kusada, Susan Menez Aspera, Hiroshi Nakanishi, Yanna Chen, Okkyun Seo, Chulho Song, Jaemyung Kim, Satoshi Hiroi, Osami Sakata, Tomokazu Yamamoto, Syo Matsumura, Yusuke Nanba, Michihisa Koyama, Naoki Ogiwara, Shogo Kawaguchi, Yoshiki Kubota, Hiroshi Kitagawa
Summary: This research demonstrates a new method to improve the catalytic performance of nanoparticles by controlling their crystal structures. By synthesizing specific PdxRu1-x nanoparticles, the performance surpasses traditional crystal structures and becomes one of the most efficient OER catalysts.
