Article
Biochemistry & Molecular Biology
Hangyu Long, Huawen Hu, Kui Wen, Xuezhang Liu, Shuang Liu, Quan Zhang, Ting Chen
Summary: This study focuses on the mediation effect of thickness on the boron doping level and electrochemical properties of polycrystalline diamond films. The results show that increasing film thickness leads to larger grain size, reduced grain boundary density, and higher boron doping level. Thicker films exhibit smaller peak potential difference, lower charge transfer resistance, and higher electron transfer rate.
Article
Materials Science, Multidisciplinary
Zhen Peng, Jing Xu, Kaori Kurihara, Mai Tomisaki, Yasuaki Einaga
Summary: This study analyzed the electrochemical CO2 reduction using sub-microcrystalline BDD electrodes with different boron doping concentrations. Results showed that synthetic SMC BDD films with high sp2-bonded carbon do not exhibit a boron-concentration dependence in terms of CO2 reduction activity, with all electrodes achieving efficient CO2 reduction at high Faradaic efficiencies for formic acid formation. It was suggested that the presence of sp2-bonded carbon is crucial for CO2 reduction.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Biophysics
Kanako Ishii, Genki Ogata, Yasuaki Einaga
Summary: In this study, an electrochemical method using boron-doped diamond electrodes was developed for the rapid and low-cost detection of triamterene in urine samples. The method showed good sensitivity and selectivity, with a low limit of detection. This method could be useful for screening athletes for the use of diuretics.
BIOSENSORS & BIOELECTRONICS
(2022)
Review
Chemistry, Physical
Robert Bogdanowicz, Jacek Ryl
Summary: This brief review focuses on the recent progress in studies of the heterogeneous electrochemical behavior of various boron-doped materials, extending from zero-dimensional particles to three-dimensional surfaces. Boron-doped diamond exhibits large heterogeneities induced by factors like multifaceted crystallinity, uneven boron concentration, carbon ratio, surface terminations, and grain size distribution. Nanostructured diamond surfaces allow for high areas and large aspect ratios, showing highly heterogeneous charge-transfer performance for various applications.
CURRENT OPINION IN ELECTROCHEMISTRY
(2022)
Article
Chemistry, Physical
M. Zelensky, J. Fischer, S. Baluchova, L. Klimsa, J. Kopeck, M. Vondracek, L. Fekete, J. Eidenschink, F. -M Matysik, S. Mandal, O. A. Williams, M. Hromadova, V. Mortet, K. Schwarzova-Peckova, A. Taylor
Summary: In this study, complex characterization and comparison of as-grown and chemical-mechanical polished ultra-thin boron doped diamond electrodes were performed. The results showed that chemical-mechanical polishing reduced the roughness of the electrode surface to below 2 nm and improved the precision of electron backscatter diffraction. X-ray photoelectron spectroscopy confirmed an increase in boron content on the surface of highly doped boron doped diamond electrodes. Additionally, chemical-mechanical polished BDD electrodes exhibited a uniform distribution of conductivity, faster heterogeneous electron transfer kinetics, and higher double layer capacitance compared to as-grown electrodes. The electroanalytical performance of chemical-mechanical polished BDD electrodes for dopamine detection was superior.
Article
Physics, Applied
Jin Uk Gwon, Tae Hwan Jang, Min Su Kim, Tae Gyu Kim, Mun Ki Bae
Summary: A boron-doped diamond thin film was synthesized using the HFCVD method, and its surface shape, growth rate, bonding structure, and electrochemical properties were characterized using SEM, Raman spectroscopy, and cyclic voltammetry. The growth rate and crystal size of the film decreased with increasing boron doping concentration, and Raman analysis confirmed the bonding effects of boron on the diamond structure. Cyclic voltammetry analysis showed that the boron-doped diamond thin film had a wide potential window.
MODERN PHYSICS LETTERS B
(2022)
Article
Chemistry, Inorganic & Nuclear
Prastika Krisma Jiwanti, Asmaul Mashad Alfaza, Grandprix T. M. Kadja, Munawar Khalil, Yasuaki Einaga
Summary: This study investigated the catalytic effect of Ti3C2Tx on CO2 reduction, showing an improvement in efficiency and potential application as a catalyst for real CO2 reduction processes.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Biochemistry & Molecular Biology
Magdalena Jakubczyk, Slawomir Michalkiewicz, Agata Skorupa, Kinga Krajcarz
Summary: This article investigates the electrochemical properties of methylisothiazolinone (MIT) and develops a new method for its determination. The method is conducted on a boron-doped diamond electrode and can detect the presence of MIT in household products without the need for separation steps.
Review
Chemistry, Physical
Miguel A. Sandoval, Wendy Calzadilla, Ricardo Salazar
Summary: This work presents an overview of recent applications of electrochemical oxidation process for contaminant mineralization and water disinfection using electrochemical reactors, and discusses recent advances in the use of flow-through reactors.
CURRENT OPINION IN ELECTROCHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Kenshin Takemura, Wataru Iwasaki, Nobutomo Morita, Shinya Ohmagari
Summary: Electrochemical analysis plays a significant role in environmental monitoring, with sensor sensitivity and signal reliability depending on electrode characteristics, particularly in the precise control of high-density nanomaterials. This study successfully utilized boron-doped diamond electrodes to coat a dense layer of gold nanoparticles at high potential for arsenic detection.
Article
Chemistry, Physical
Kehao Zhang, Hailong Wang, Yanjun Zhao, Yaohui Xi, Bin Liu, Jianqi Xi, Gang Shao, Bingbing Fan, Hongxia Lu, Hongliang Xu, Rui Zhang, Ning Yan, Zhiqiang Wang
Summary: In this study, boron-doped polycrystalline diamond films were deposited on silicon wafers by using MPCVD. Films with five-fold twin structures exhibited higher Hall mobility, lower electrical resistivity and larger hole carrier concentrations, showing excellent electrochemical properties. Furthermore, these films showed promising potential as wastewater degradation materials.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Daibing Luo, Daichuan Ma, Shanhu Liu, Kazuya Nakata, Akira Fujishima, Liangzhuan Wu
Summary: Fluorine-containing diamond was successfully deposited onto a boron-doped diamond (BDD) substrate using the HFCVD process, resulting in a fluorine-modified BDD (F-BDD) electrode. The F-BDD electrode exhibited high efficiency in formaldehyde (HCHO) generation during CO2 reduction, with improved stability and anti-contamination properties compared to the BDD electrode.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Electrochemistry
Mai Tomisaki, Keisuke Natsui, Satoko Fujioka, Koichi Terasaka, Yasuaki Einaga
Summary: The electrochemical CO2 reduction on boron-doped diamond electrodes in an aqueous solution with fine bubbles showed decreased overpotential and promoted production of carbon monoxide compared to the solution without fine bubbles. Fine bubbles in the solution facilitated mass transport and also acted as a catalyst for producing carbon monoxide. Potential-dependent in-situ ATR-IR measurements confirmed the catalytic activity, indicating that CO2 intermediates or molecules themselves can be stabilized near the electrode in solutions with fine bubbles, making it easier for them to be adsorbed on the electrode surface.
ELECTROCHIMICA ACTA
(2021)
Article
Electrochemistry
Peter Cambal, Simona Baluchova, Andrew Taylor, Ludek Mika, Martin Vondracek, Zuzana Gedeonova, Pavel Hubik, Vincent Mortet, Karolina Schwarzova-Peckova
Summary: This study investigates the effects of vicinal crystal orientation, boron doping level, and surface termination on the electrical and electrochemical properties of boron-doped diamond electrodes. The results highlight the importance of boron content and superficial hydrogen in determining the conductivity and performance of the electrodes.
ELECTROCHIMICA ACTA
(2023)
Article
Materials Science, Ceramics
Jiatai Wang, Yuanyuan Li, Shishi Wei, Shunli Hou, Geng Zhou, Xiaocen Yan, Ruheng Xi, Xiaoyi Hou
Summary: Through doping B3+ using a high-temperature solid-phase method, the electrochemical properties of the LiNi0.815Co0.15Al0.035O2 cathode (NCA) were significantly improved. X-ray diffraction analysis and Rietveld refinement showed that B3+ enhanced lattice ordering by minimizing Li+/Ni2+ mixing. Scanning electron microscopy observations indicated that B3+ doping changed the particle morphology. The specific discharge capacities of 1.5% B-NCA were 178.31 and 123.74 mAhg 1 at 0.2 and 5C, respectively. After 100 cycles, the specific discharge capacity was 176.29 mAhg 1 at 0.2C with a capacity retention of 98.87%. Boron doping significantly improves the structural stability of nickel-rich cathode materials by suppressing the detrimental H2 & RARR;H3 phase transition, thus improving the electrochemical performance of nickel-rich ternary lithium-ion batteries.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Analytical
Anita Rachmawati, Afiten Rahmin Sanjaya, Yulia Mariana Tesa Ayudia Putri, Jarnuzi Gunlazuardi, Tribidasari A. Ivandini
Summary: A biosensor system based on enzymatic inhibition of acetylcholinesterase (AChE) by isoprocarb has been developed. The system utilizes a gold nanoparticles-polyaniline modified graphite pencil electrode (AuNPs-PANI-GPE) to detect thiocholine changes caused by isoprocarb. The electrode, prepared through electro-polymerization of aniline and the deposition of gold nanoparticles, showed enhanced detection capabilities compared to unmodified electrodes. Under optimal conditions, the system provided a linear calibration curve for isoprocarb in the concentration range of 0.05-1.0 mu M, with limits of detection and quantification of 0.1615 nM and 0.5382 nM, respectively.
ANALYTICAL SCIENCES
(2023)
Article
Chemistry, Physical
Huu Duc Luong, Chenchao Xu, Randy Jalem, Yoshitaka Tateyama
Summary: This study investigates the electronic and ionic conductivities of Li-x(Co, Ni)O-2 layered oxides using Boltzmann transport theory and molecular dynamics at the ab initio level. The calculated results successfully demonstrate the electronic conductivities quantitatively and suggest a microscopic origin of the electronic difference between LixCoO2 and LixNiO2. The ratio and product of the electronic and ionic conductivities are proposed as descriptors for evaluating the battery positive-electrode performance.
JOURNAL OF POWER SOURCES
(2023)
Article
Materials Science, Multidisciplinary
Imia R. Banurea, Afiten R. Sanjaya, Noverra M. Nizardo, Tribidasari A. Ivandini
Summary: A sensor for 3-monochloropropane-1,2-diol (3-MCPD) detection was developed using molecularly imprinted polymer (MIP) technique. The sensor, made from modified graphite pencil electrodes with gold particles and p-amino thiophenol polymer membrane, formed a self-assembled MIP with 3-MCPD. The sensor signal was obtained through electrochemical impedance spectroscopy, showing a linear calibration curve in the concentration range of 0.12-1.11 ppm. The sensor exhibited good stability, selectivity for interferences, and successfully detected 3-MCPD in real cooking oil samples.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Ryoma Sasaki, Bo Gao, Taro Hitosugi, Yoshitaka Tateyama
Summary: Condensed matters with high ionic conductivities are essential in solid-state devices. However, computing correlated ionic conductivities is costly, leading to the use of approximations. This study presents a new method, CCD-NEMD, which allows for the calculation of correlated conductivities with fewer sampling steps. It is demonstrated to be effective in evaluating conductivities in solid electrolytes and can be applied to investigate grain boundaries and composite electrolytes.
NPJ COMPUTATIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Yulia M. T. A. Putri, Thomas W. Chamberlain, Volkan Degirmenci, Jarnuzi Gunlazuardi, Yuni K. Krisnandi, Richard I. Walton, Tribidasari A. Ivandini
Summary: This study proposes NiCo-MOF-74 synthesized directly on the surface of porous NiO film as an efficient electrocatalyst for the anode in direct urea fuel cells. The nickel-to-cobalt ratio of 4:1 exhibits the best catalytic activity towards urea oxidation, resulting in significant current enhancement compared to other electrodes. At optimized conditions, a current density of approximately 110 mA cm-2 and a maximum power density of 4131 mu W cm-2 can be achieved in an electrolyte solution of 3.0 M KOH and 1.0 M urea. The increased active surface area of the nickel-based anodes contributes to an abundance of active sites for urea oxidation, leading to excellent stability and reproducibility over 15 hours of application in a direct urea fuel cell.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Hiroki Yamada, Koji Ohara, Satoshi Hiroi, Atsushi Sakuda, Kazutaka Ikeda, Takahiro Ohkubo, Kengo Nakada, Hirofumi Tsukasaki, Hiroshi Nakajima, Laszlo Temleitner, Laszlo Pusztai, Shunsuke Ariga, Aoto Matsuo, Jiong Ding, Takumi Nakano, Takuya Kimura, Ryo Kobayashi, Takeshi Usuki, Shuta Tahara, Koji Amezawa, Yoshitaka Tateyama, Shigeo Mori, Akitoshi Hayashi
Summary: Controlling Li ion transport in glasses is crucial for developing all-solid-state batteries. Li3PS4 glass, a solid electrolyte candidate, shows a dynamic coupling effect between Li+ cation mobility and PS43- anion libration, known as the paddlewheel effect. Additionally, it exhibits a coordinated cation diffusion effect (cation-cation interactions) that enhances Li ion transport. The correlation between Li+ ions in the glass structure can be determined by evaluating their valence oscillations, providing insights for the development of new solid electrolytes.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Physical
Munawar Khalil, Lulu Aulia, Tribidasari A. Ivandini, Grandprix T. M. Kadja, Rahmat Hidayat, Fitri Fitrilawati, Prastika K. Jiwanti
Summary: This study investigates the impact of ligament gap in NiO mesoporous with different templates on the activity of rGO/NiO in alkaline hydrogen evolution reaction. It is found that the activity of the electrocatalyst is primarily determined by the size of ligament gap rather than the surface area. The results demonstrate that rGO/NiO prepared with KCC-1 template exhibits superior activity due to its larger ligament gap, despite having the smallest surface area. It is suggested that the accumulated hydrogen gas within the NiO mesoporous structure could elevate the internal electrode resistance and reduce overall catalytic activity.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Nat Phongprueksathat, Kah Wei Ting, Shinya Mine, Yuan Jing, Ryo Toyoshima, Hiroshi Kondoh, Ken-ichi Shimizu, Takashi Toyao, Atsushi Urakawa
Summary: Low temperature and high pressure are advantageous conditions for achieving high conversion and selectivity in CO2 hydrogenation. Re/TiO2 has been identified as a promising catalyst with higher activity than the industrial Cu/ZnO/Al2O3 catalyst at high pressure and low temperature. The study provides insights into the nature of active sites and active species, demonstrating the active role of cationic Re species in CO2 activation and formate intermediate formation.
Article
Chemistry, Physical
Yuan Jing, Chenxi He, Ningqiang Zhang, Yu Murano, Ryo Toyoshima, Hiroshi Kondoh, Yuuta Kageyama, Hironori Inomata, Takashi Toyao, Ken-ichi Shimizu
Summary: In this study, the addition of Ag was found to enhance the catalytic efficiency of RhOx/Al2O3 catalyst, especially at low temperatures. The promotional effect was mainly achieved by enhancing the thermal reduction of Rh oxide.
Article
Chemistry, Physical
Hiroe Kubota, Yuan Jing, Li Wan, Jiahuan Tong, Ningqiang Zhang, Shinya Mine, Takashi Toyao, Ryo Toyoshima, Hiroshi Kondoh, Davide Ferri, Ken-ichi Shimizu
Summary: In this study, operando spectroscopies were used to investigate the selective catalytic reduction of NO with NH3 over WO(3)-loaded CeO2. The reduction/oxidation half-cycles were elucidated through in situ Ce and W L-3-edge X-ray absorption near-edge structure, UV-vis, and infrared spectroscopies. The Ce4+ species were reduced by NO + NH3 to yield N-2 and Ce3+ species in the reduction half-cycle, which were then reoxidized by O-2 in the oxidation half-cycle. The oxidation state of the W(6+) species remained unchanged under redox conditions. IR and theoretical results suggested that the reduction half-cycle started with the reaction of W6+-OH and adjacent Ce(4+)-O with NO to afford Ce3+ species and gaseous HONO, which was then converted to NO+ species on the catalyst. The NO+ species reacted with NH3 to generate N-2.
Article
Materials Science, Multidisciplinary
Munawar Khalil, Michael Lesa, Alexander G. G. Juandito, Afiten R. R. Sanjaya, Tribidasari A. A. Ivandini, Grandprix T. M. Kadja, Muhammad Haris Mahyuddin, Mehran Sookhakian, Yatimah Alias
Summary: We synthesized a mesoporous NiFe2O4/MXene nanocomposite for the alkaline HER, which showed significantly improved electrocatalytic activity compared to individual NiFe2O4 and MXene components. The mesoporous structure provided a large surface area and enhanced mass transport, while the incorporation of MXene improved charge transfer kinetics. DFT calculations revealed more favorable H atom adsorption and activation on the NiFe2O4 surface. This study highlights the potential of templated mesoporous nanocomposites for efficient electrocatalysts in alkaline HER and contributes to renewable energy technologies.
MATERIALS ADVANCES
(2023)
Article
Chemistry, Multidisciplinary
Millati H. Saprudin, Prastika K. Jiwanti, Deden Saprudin, Afiten R. Sanjaya, Yulia M. T. A. Putri, Yasuaki Einaga, Tribidasari A. Ivandini
Summary: Boron-doped diamond was modified with copper-gold particles to enhance its catalytic effect on CO2 reduction. The flow system using the modified BDD electrodes, especially with copper and gold as the modifying particles, achieved high production rates and concentrations of formic acid and acetic acid. The bimetal-modification also provided better stability for the metal particles compared to single metal modification.
Article
Chemistry, Multidisciplinary
Yang Wang, Haoyu Zhao, Chang Liu, Yusuke Ootani, Nobuki Ozawa, Momoji Kubo
Summary: High entropy alloys (HEAs) have excellent potential but are limited by stress corrosion cracking (SCC). This study investigates the effects of high-temperature/pressure water on the tensile behavior and deformation mechanisms of an Fe40Ni40Cr20 alloy. In a vacuum, the alloy forms layered HCP phases due to Shockley partial dislocations. However, in a corrosive environment, an oxide surface layer suppresses the formation of Shockley partial dislocations, leading to FCC-to-BCC phase transition and reduced ductility. This fundamental study contributes to improving HEAs' resistance to SCC in experiments.
Article
Chemistry, Physical
Randy Jalem, Yoshitaka Tateyama, Kazunori Takada, Seong-Hoon Jang
Summary: This study used high-throughput computational methods and artificial intelligence techniques to discover 24 candidate solid electrolytes for all-solid-state Li+-ion batteries. These compounds have high synthesizability and excellent properties. The study also explored possible solid-state synthesis routes and proposed an effective calculation methodology for large-scale material screening.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Bo Gao, Randy Jalem, Yoshitaka Tateyama
Summary: This study investigates the atomic-scale impact of dopants at the grain boundary (GB) of the garnet-type Li7La3Zr2O12 (LLZO) solid electrolyte (SE). The results show that different dopants have different segregation tendencies and can affect the Li-ion conductivity and network structure. Furthermore, electronic state calculations reveal the alleviating effect of dopants on dendrite formation along LLZO GBs.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
