Article
Physics, Applied
Mohsen Shojaeifar, Mohammad Bagher Askari, Seyed Rouhollah Samareh Hashemi, Antonio Di Bartolomeo
Summary: This study investigates the potential of metal oxide-based nanocatalysts and multi-walled carbon nanotubes (MWCNTs) for the electrooxidation of methanol and ethanol. The synthesized MnO2-NiO and MnO2-NiO-MWCNT catalysts show improved stability and kinetic performance, making them attractive options for alcohol fuel cells.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Multidisciplinary Sciences
Jinfa Chang, Guanzhi Wang, Xiaoxia Chang, Zhenzhong Yang, Han Wang, Boyang Li, Wei Zhang, Libor Kovarik, Yingge Du, Nina Orlovskaya, Bingjun Xu, Guofeng Wang, Yang Yang
Summary: This article investigates the development of high-activity and durable catalysts for direct ethanol fuel cells. The authors propose a Pd/Co@N-C catalyst that can prevent catalyst structural degradation and enhance electron transfer and activity/durability. This study provides a strategy for innovative catalyst structural design and promotes the development of fuel cells and other sustainable energy-related technologies.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Zhengcheng Wang, Shangyan Zhou, Wei Liao, Qian Zhou, Meida Chen, Jin Long, Qingmei Wang
Summary: Designing efficient and inexpensive Pt-based catalysts is crucial for the commercialization of direct methanol fuel cells. In this study, highly catalytic performance PtFe alloys supported on multiwalled carbon nanotubes (MWCNTs) decorated with nitrogen-doped carbon (NC) were successfully prepared by co-engineering the surface composition and electronic structure. The Pt1Fe3@NC/MWCNTs catalyst exhibited significantly improved mass activity in methanol oxidation reaction and lower CO oxidation initial potential compared to the pristine Pt/C catalyst, thanks to the optimal surface compositions, anti-corrosion ability of MWCNTs, strong electron interaction, and the N-doped carbon layer.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Dashu Pan, Yubing Xue, Songtao Xiao, Yinggen Ouyang, Feng Zuo, Fuyan Lou, Xiang Li
Summary: Radioactive UO2 powder was prepared by hydrothermal method and a set of Pt-xUO(2)/C catalysts were synthesized by impregnation method to improve the low activity and easy poisoning of anode Pt/C catalysts in a direct ethanol fuel cell. The electrochemical and single cell test results confirmed that the catalytic performance of Pt-10% UO2/C was significantly better than Pt/C. It is speculated that the synergistic effect of Pt and U enhances the catalytic activity, while UO2 improves the resistance to CO poisoning.
Article
Chemistry, Applied
Tong Wu, Xiao Wang, Ahmet Emrehan Emre, Jinchen Fan, Yulin Min, Qunjie Xu, Shigang Sun
Summary: The graphene-nickel nitride hybrids supported palladium nanoparticles were designed to improve the durability of electrocatalysts for ethanol oxidation reaction (EOR). The introduction of AG-Ni3N depresses the CO absorption and promotes the adsorption of OH species for CO oxidation removal. The Pd/AG-Ni3N catalyst exhibits excellent electroactivity, with mass catalytic activity around 5.24 times higher than the commercial catalyst Pd/C in alkaline media, and displays excellent stability and durability after chronoamperometric measurements.
JOURNAL OF ENERGY CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Shuyue Xie, Fangfei Liu, Tursun Abdiryim, Xiong Liu, Ruxangul Jamal, Yanyan Song, Mariyam Niyaz, Yajun Liu, Hujun Zhang, Xinsheng Tang
Summary: In this study, platinum-palladium bimetallic nanoparticles were successfully loaded onto poly(3,4-ethylenedioxythiophene) (PEDOT)-embellished titanium carbide nanosheets through a facile and rapid chemical reduction-assisted one-pot hydrothermal process. The resulting Ti(3)C(2)Tx/PEDOT/Pt-Pd catalyst demonstrated excellent electrocatalytic activity for the methanol oxidation reaction (MOR), with a larger electrochemical activity surface area and higher mass activity compared to other catalysts. The hybrid structure formed between PEDOT and Ti(3)C(2)Tx provided a sizable active surface and more active sites, enhancing the dispersion of Pt-Pd NPs and facilitating mass transfer. The Schottky junctions between PEDOT and Pt-Pd NPs contributed to charge transfer, while the electronic effects and synergistic interactions between the support and catalyst favored the catalytic activity.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Yubing Xue, Dashu Pan, Feng Zuo, Songtao Xiao, Xiang Li, Fuyan Lou, Mingming Li, Yinggen Ouyang
Summary: In this study, a novel self-reactivated catalyst Pt-ThO2/C was prepared by using ThO2 as a catalytic additive to address the low activity and toxicity issues of Pt/C catalyst in direct ethanol fuel cell. The results showed that Pt-6.67 wt%ThO2/C exhibited superior catalytic activity and resistance to CO poisoning compared to Pt/C-NaBH4 in both electrochemical workstation and single-cell tests. It is speculated that the inclusion of ThO2 not only enhances the catalytic activity through the synergistic effect between Pt and Th, but also generates a large amount of OH radicals due to Th-232, which can oxidatively desorb CO from Pt-COads and solve the CO poisoning problem.
Article
Chemistry, Physical
Sayyar Muhammad, Darren Anthony Walsh
Summary: The surface electrocatalysis of ethanol and dimethyl ether was investigated on a Pt electrode in a protic ionic liquid. The formation of Pt-oxides/hydroxides on the Pt surface was found to play a pivotal role in the electrocatalytic oxidation of ethanol and dimethyl ether.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Jiexin Zhu, Lixue Xia, Ruohan Yu, Ruihu Lu, Jiantao Li, Ruhan He, Yucai Wu, Wei Zhang, Xufeng Hong, Wei Chen, Yan Zhao, Liang Zhou, Liqiang Mai, Ziyun Wang
Summary: Constructing three-dimensional crumpled Ti3C2Tx MXene balls with abundant Ti vacancies via a spray-drying process can effectively anchor Pt clusters and enhance the electrocatalytic activity for methanol oxidation. This material shows a high mass activity and retains a significant portion of its current density even after long-term operation, indicating its potential for practical applications in fuel cells.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Xiao-Di Tang, Yi-yang Wang, Chao-Yang Wang, Lei Yuan, Yong Yi
Summary: In this study, a platinum-bismuth alloy catalyst (PtBi@CA) was synthesized by a one-step reduction method without the use of structure directing agents and stabilizers. The PtBi@CA(50-50) catalyst exhibited the smallest crystallite size and achieved high peak current density and pseudo-steady current density of 64.336 mA/cm2 and 0.096 mA/cm2, respectively, which were 11.22 times and 1.85 times higher than those of the most advanced commercial carbon-supported platinum catalysts (Pt/C). This method offers a simple and feasible approach to significantly reduce the usage of precious metals and shows great potential in the synthesis of anode electrocatalysts for direct ethanol fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Electrochemistry
C. Barrientos, R. Moscoso, S. Moris, J. A. Squella
Summary: In this study, three new nitroaromatic compounds were synthesized and electrochemically studied on nanostructured electrodic platforms. It was found that these compounds were easily reducible, generating stable redox mediator couples.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Guirong Zhang, Huihui Zhang, Lushi Tan, Zhejuan Zhang, Jiaxing Lu
Summary: The study prepared carbon paste electrodes with different mass percent of silicon-carbon materials. Results showed that the Pt/CPE-Si@C(10%) electrode exhibited higher catalytic activity and stronger tolerance against CO poisoning in the electrocatalytic oxidation of methanol, compared to the Pt/CPE electrode.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Jinfa Chang, Guanzhi Wang, Cheng Li, Yaqi He, Yuanmin Zhu, Wei Zhang, Muhammad Sajid, Abdelkader Kara, Meng Gu, Yang Yang
Summary: A PtPd HEA catalyst with a PtPd-rich surface and super-low platinum group metals loading was developed, achieving a maximum power density of 0.72 W cm -2 and durable operation for 1,200 h in DEFCs. This work has important implications for the development of nanostructured alloys for renewable energy applications.
Article
Chemistry, Multidisciplinary
Jing Sun, Xianzhuo Lao, Min Yang, Aiping Fu, Jianyu Chen, Mingyuan Pang, Fahui Gao, Peizhi Guo
Summary: The study of alloyed bimetallic electrocatalysts with a three-dimensional structure assembly is of great interest in improving the efficiency of ethanol oxidation. The Pd3Pb/Pd NSAs exhibit excellent electrocatalytic activity, which can be regulated by adjusting the atomic mole ratio of lead and lead metal precursors.
Article
Polymer Science
Marcelo Costa Flores, Katia Cecilia de Souza Figueiredo
Summary: Separating carbon dioxide from flue gases is a significant challenge, and membrane processes show promise in overcoming technical and economic constraints with the development of advanced materials.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Physical
Le Quynh Hoa, Ralph Baessler, Dirk Bettge
Article
Green & Sustainable Science & Technology
Sandra Knauer, Le Quynh-Hoa, Ralph Baessler, Philip Jaeger
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2019)
Article
Chemistry, Physical
Gabriela Aristia, Le Quynh Hoa, Ralph Baessler
Article
Engineering, Chemical
Andreas Kratzig, Le Quynh Hoa, Dirk Bettge, Martina Menneken, Ralph Baessler
Article
Health Care Sciences & Services
Yuko Gondoh-Noda, Mitsuhiro Kometani, Akihiro Nomura, Daisuke Aono, Shigehiro Karashima, Hiromi Ushijima, Eiichi Tamiya, Toshinori Murayama, Takashi Yoneda
JMIR MHEALTH AND UHEALTH
(2020)
Article
Engineering, Chemical
Le Quynh Hoa, Ralph Baessler, Dirk Bettge, Enrico Buggisch, Bernadette Nicole Schiller, Matthias Beck
Summary: Representative low-cost materials were embedded in mortar to mimic the casing-mortar interface in injection wells. Two types of cement were investigated for their corrosion resistance, and exposure tests revealed unexpected corrosion types on steel surfaces. Surface analysis and element mapping were used to trace chloride intrusion and corrosion process on exposed specimens.
Article
Materials Science, Multidisciplinary
Gabriela Aristia, Le Quynh Hoa, Marianne Nofz, Regine Sojref, Ralph Bassler
Summary: Al2O3 has excellent chemical and thermal resistance, making it a potential coating candidate to protect steels in geothermal applications. The study shows that the Al2O3 coating remains stable on martensitic steels in the high temperature and aggressive environment of the North German Basin, even after long-term exposure.
Article
Chemistry, Multidisciplinary
Hirotaka Uzawa, Satoshi Kondo, Takehiro Nagatsuka, Hajime Miyaguchi, Yasuo Seto, Aguri Oshita, Hirofumi Dohi, Yoshihiro Nishida, Masato Saito, Eiichi Tamiya
Summary: The microwave irradiation effectively promotes the installing process for three different GSL derivatives, with each requiring a different optimal thermal condition. The study utilized a localized surface plasmon resonance biosensor to analyze the enhanced response of these GSL glycochips to corresponding toxins.
Article
Chemistry, Analytical
Eiichi Tamiya
Summary: This paper introduces portable sensors based on genetic measurements for diagnosing infectious diseases and disease risk using SNPs. The sensors utilize electrochemical measurements with printed electrodes to detect changes in nucleic acid-binding molecules and monitor the amplification of specific genes. The method has been successfully applied to measure pathogenic microorganisms and viruses, as well as diagnose SNPs related to Alzheimer's disease.
Article
Chemistry, Analytical
Eiichi Tamiya, Shuto Osaki, Tomoko Tsuchihashi, Hiromi Ushijima, Keiichi Tsukinoki
Summary: Monitoring biomarkers using saliva instead of blood samples is advantageous for assessing daily physical condition. This study analyzed the levels of neutralizing antibodies, IgG, and sIgA in response to the SARS-CoV-2 vaccine in saliva. Results showed increased salivary IgG levels after the second vaccination, along with an increasing trend in sIgA levels. This suggests the potential for using saliva to routinely assess vaccine efficacy. The development of an electrochemical immunosensor assay using portable devices offers a useful tool for individual-based diagnosis using saliva samples.
Article
Chemistry, Multidisciplinary
Hirotaka Uzawa, Takehiro Nagatsuka, Yasuo Seto, Yoshihiro Nishida, Masato Saito, Eiichi Tamiya
Summary: Glycolipid chips with a double layer of Au nanoparticles were developed for detecting biological toxins. The chips consisted of an under and an upper layer of Au nanoparticles on glass plates, linked with 1,8-octanedithiol using a self-assembled monolayer technique. A tris-sialo glycosphingolipid, ganglioside GT1b, was immobilized on the upper layer and botulinum toxin was detected using localized surface plasmon resonance (LSPR). The GT1bCer-coated chip with a double layer of Au nanoparticles showed enhanced LSPR detection of the toxin compared to single monolayers. The combination of 60 and 40 nm Au nanoparticles in the under and upper layer, respectively, achieved the best results for toxin detection below 5 ng/mL using a portable LSPR device.
Article
Biochemical Research Methods
Hiroki Shigemori, Satoshi Fujita, Eiichi Tamiya, Shin-ichi Wakida, Hidenori Nagai
Summary: The CRISPR/Cas12 system has potential as a next-generation nucleic acid detection tool. A solid-phase collateral cleavage (SPCC) reaction is utilized to achieve one-pot multiplex dsDNA detection with minimal operational steps. The sensor immobilizes Cas12-crRNA and ssDNA on the sensing surface and demonstrates high sequence specificity and sensitivity.
BIOCONJUGATE CHEMISTRY
(2023)
Article
Chemistry, Analytical
Yuhei Terada, Ain Obara, Jonathan Campos Briones, Xi Luo, Wilfred Villariza Espulgar, Masato Saito, Hyota Takamatsu, Eiichi Tamiya
Summary: Single-cell analysis is increasingly important for revealing cell heterogeneity, with implications in medicine and biology. The development of a single-cell secretion detection chip with microwells and Au nanopillars for localized surface plasmon resonance (LSPR) measurement represents a significant advancement in cell biology and immunology. The chip allows for the direct detection of IL-6 secretion from individual cells and achieves a high trapping efficiency of over 80%.
Article
Nanoscience & Nanotechnology
Yuhei Terada, Ain Obara, Hyota Takamatsu, Wilfred Villariza Espulgar, Masato Saito, Eiichi Tamiya
Summary: The thickness of the biomolecular layer on the Au surface was controlled by changing the polymer chain length of the immobilized glycopolymer, and the absorption of proteins onto the Au surface was detected by the shift of absorbance peak wavelength. This difference in LSPR signal response was remarkable for cytokine recognition compared to larger proteins.
ACS APPLIED BIO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Juthi Adhikari, Natasha Ann Keasberry, Abdul Hanif Mahadi, Hiroyuki Yoshikawa, Eiichi Tamiya, Minhaz Uddin Ahmed
