Article
Chemistry, Physical
Suphitsara Maturost, Suwaphid Themsirimongkon, Surin Saipanya, Li Fang, Natthapong Pongpichayakul, Jaroon Jakmunee, Paralee Waenkaew
Summary: Pd/xCuO-10CNT (x = 1, 2, 3, 4) catalysts synthesized using an improved polyol method exhibit excellent oxidation performance and electrocatalytic activity, along with stability and CO poisoning tolerance. The insertion of CuO onto the CNT surface provides additional electrochemical active sites, facilitating charge transfer.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Ibrahim GOzeten, Mehmet Tunc
Summary: This study demonstrates the effective catalytic reduction of hexavalent Chromium to trivalent Chromium using a catalyst called Pd@MWCNT, which is supported by palladium (Pd-0) metal nanoparticles. The catalyst was prepared through impregnation-reduction technique and characterized using various analytical techniques. The results show that the catalyst exhibited excellent stability and activity, even after multiple reuse cycles.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Li Zhang, Haiyan Yu, Yinglei Wang
Summary: This study reports a scalable method for preparing a composite of nano red phosphorus particles on carbon nanotubes. The synthesized composite exhibits high capacity retention during cycling.
Article
Chemistry, Multidisciplinary
Rong Wang, Xinyue Wang, Weijun Weng, Ying Yao, Pinit Kidkhunthod, Changchun Wang, Yang Hou, Jia Guo
Summary: In this study, an ultrathin conjugated microporous polymer sheath was synthesized around carbon nanotubes using a new method, effectively preserving Co-II metal and achieving high selectivity in CO2 reduction. The study provides new insights into molecularly regulating electrocatalytic reactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Nanoscience & Nanotechnology
Joseph A. Stapleton, Eric M. Hofferber, Jakob Meier, Ivon Acosta Ramirez, Nicole M. Iverson
Summary: This work develops a platform for the immobilization of SWNT sensors with increased fluorescence yield, longevity, fluorescence distribution, and fast reaction times.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Analytical
Suphitsara Maturost, Nathapong Pongpichayakul, Paralee Waenkaew, Napapha Promsawan, Suwaphid Themsirimongkon, Jaroon Jakmunee, Surin Saipanya
Summary: This paper presents a method for preparing an anode electrocatalyst for fuel cells, which shows promising potential for application in low-temperature fuel cells due to its high oxidation activity and durability. The new material was characterized and tested for performance, demonstrating improved catalytic activity and mass transfer efficiency for oxidations.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Junyu Wang, Mengjie Feng, Shuozhen Hu, Xinsheng Zhang
Summary: SnO2-decorated carbon black was used as the catalyst carrier to synthesize Pd/SnO2/C for formic acid oxidation reaction (FAOR). The introduction of SnO2 reduced the particle size of Pd nanoparticles and formed the Pd-O-Sn structure. Pd/SnO2/C showed higher concentration of adsorbed oxygen and less adsorption of poisoning intermediates compared to Pd/C. The diffusion rate of formic acid on the electrode surface was accelerated by the introduction of SnO2.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Analytical
QingYi Meng, Shuhua Wei, Zhiyuan Xu, Qiang Cao, Yushi Xiao, Na Liu, Huan Liu, Gang Han, Jing Zhang, Jiang Yan, Alexander P. Palov, Lidong Wu
Summary: This study improved the performance of SWCNT-FET sensors by introducing P4VP and HfO2, resulting in a high sensitivity and low detection limit for Cu2+, making it a promising choice for the future manufacturing of custom sensors.
ANALYTICA CHIMICA ACTA
(2021)
Article
Nanoscience & Nanotechnology
Janak Paudyal, Po Wang, Fuyi Zhou, Yingzhu Liu, Yong Cai, Yi Xiao
Summary: Platinum nanostructures have been used as electrocatalysts on various electrode substrates for applications such as molecular sensing and fuel storage. Paper-based devices embedded with micro- or nanoscale metallic electrodes could prove useful for wearable devices and portable applications. The combination of platinum nanostructures with SWCNT paper substrate may offer high-quality, disposable electrodes for a variety of applications.
ACS APPLIED NANO MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Sixing Yin, Wentao Lu, Xin Wu, Qunyi Luo, Erqiang Wang, Cun-Yue Guo
Summary: Fabricating flexible high-performance PANI/SWCNT TE composites by dynamic 3-phase interfacial electropolymerization of aniline and physical mixing with SWCNTs, the addition of DMSO and varying loadings of SWCNTs show significant enhancements in TE performance. The composites exhibit the highest power factor of 236.4 +/- 5.9 μWm(-1)K-2 at room temperature, demonstrating the effectiveness of introducing DMSO into the electrolyte for fabricating high-performance TE composites.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Tomasz Szumelda, Alicja Drelinkiewicz, Robert Kosydar, Jacek Gurgul, Dorota Duraczynska
Summary: Carbon-supported bimetallic Pd-Ir catalysts were prepared via water-in-oil microemulsion method with different metal precursors concentrations, showing varying structural properties and catalytic activities for formic acid oxidation. The nanoparticles exhibited similar sizes regardless of Pd/Ir ratio, with different surface compositions and catalytic performances observed at low and high precursor concentrations. The Pd85Ir15/C catalyst displayed the highest activity, outperforming monometallic Pd catalysts.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Qiyi Yang, Hua Lin, Xuefei Wang, Lian Ying Zhang, Maoxiang Jing, Weiyong Yuan, Chang Ming Li
Summary: For the first time, dynamic self-assembly of adenine has been used to grow ultrasmall, highly dispersed, and clean Pd nanoparticles on pristine graphene, resulting in a nanohybrid with remarkably enhanced formic acid oxidation catalytic activity. The excellent catalytic performance is attributed to the well-dispersed, ultrasmall, and clean Pd nanoparticles on pristine graphene, which provide numerous electrochemically accessible active sites and preserve the high intrinsic catalytic activity of Pd. In addition, the cocatalytic effect of pristine graphene enhances CO tolerance and intrinsic activity of Pd, while the robust attachment of Pd with high CO tolerance on graphene provides high durability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Polymer Science
Kandiyil Juraij, Chinglenthoiba Chingakham, Olongal Manaf, Paroly Sagitha, Vasudevan Suni, Vandana Sajith, Athiyanathil Sujith
Summary: Researchers have developed a superoleophilic and high-strength electrospun membrane for oil/water separation applications. The composite membrane showed excellent mechanical properties and dye adsorption capacity, making it a potential candidate for oil/water separation and dye removal.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Engineering, Environmental
Di Pang, Yue Liu, Haiou Song, Duozhe Chen, Weiqing Zhu, Rumeng Liu, Hu Yang, Aimin Li, Shupeng Zhang
Summary: In this study, a Ti3+- and N-codoped TiO2 nanotube array (TiON) anode was fabricated by electrochemical reduction, which showed significantly improved electrochemical performance in the electrocatalytic oxidation of tetracycline and metronidazole. The achieved TiON anode demonstrated high removal efficiency for both antibiotics, indicating its potential practical application in water treatment.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Green & Sustainable Science & Technology
Haojie Shao, Yutong Wu, Xin Xu, Yuxi Xian, Yangyang Shi, Feihong Wang, Kai Lv, Chuntian Tan, Luyuan Hao, Binbin Dong, Simeon Agathopoulos
Summary: A porous titanium carbonitride ceramic substrate with finger-like holes was prepared, and CoxNi1-xP was in situ formed on it to achieve self-supported ceramic electrodes. The Co0.9Ni0.1P/TiC0.5N0.5 electrode exhibited low overpotentials, high long-term stability, and better performance than Pt/C at high current density in neutral media.
ADVANCED SUSTAINABLE SYSTEMS
(2022)
Article
Chemistry, Physical
Yu-Xuan Xiao, Jie Ying, Jiang-Bo Chen, Yuan Dong, Xiong Yang, Ge Tian, Jinsong Wu, Christoph Janiak, Kenneth Ozoemena, Xiao-Yu Yang
Summary: The heavy d-pi effect is an important theoretical model for strong Pt-C interaction, and confining Pt nanoparticles within N-doped carbon can enhance this effect. In this study, confined ultrafine Pt-NPs in N-doped porous carbon fibers were successfully synthesized and showed outstanding catalytic activity and durability in the hydrogen evolution reaction.
CHEMISTRY OF MATERIALS
(2022)
Article
Electrochemistry
Adewale K. Ipadeola, Augustus K. Lebechi, Lesego Gaolatlhe, Aderemi B. Haruna, Mira Chitt, Kamel Eid, Aboubakr M. Abdullah, Kenneth Ozoemena
Summary: Porous high-entropy alloys (HEAs) have shown promise as electrocatalysts for water-splitting reactions. This review discusses the preparation methods of porous HEAs and the effects of their key features on the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), as well as provides insights into current limitations and future prospects for the development of ideal HEAs for OER and HER.
ELECTROCHEMISTRY COMMUNICATIONS
(2022)
Article
Electrochemistry
Nonhlanhla Eugenia Mphahlele, Adewale Kabir Ipadeola, Aderemi Bashiru Haruna, Patrick Vaati Mwonga, Remegia Mmalewane Modibedi, Nithyadharseni Palaniyandy, Caren Billing, Kenneth Ikechukwu Ozoemena
Summary: Pd-based mono and bi-metallic nano-electrocatalysts were synthesized using different methods and their performance in glycerol oxidation reaction was investigated. It was found that microwave-synthesized samples exhibited better crystallinity, surface characteristics, and electrocatalytic properties compared to conventionally synthesized samples. This study provides new opportunities for developing high-performance direct alkaline glycerol fuel cells.
ELECTROCHIMICA ACTA
(2022)
Review
Materials Science, Multidisciplinary
V. Pavlenko, S. Khosravi, S. Zoltowska, A. B. Haruna, M. Zahid, Z. Mansurov, Z. Supiyeva, A. Galal, K. I. Ozoemena, Q. Abbas, T. Jesionowski
Summary: Carbons with hierarchical pores obtained via template-assisted methods offer great control over pore structure and geometry, with uniform distribution and better connectivity. The easy functionalization of these templated porous carbons makes them excellent materials for various applications such as catalysis, energy storage and conversion, sensors, and environmental applications.
MATERIALS SCIENCE & ENGINEERING R-REPORTS
(2022)
Article
Electrochemistry
B. Shaku, T. P. Mofokeng, N. J. Coville, K. I. Ozoemena, M. S. Maubane-Nkadimeng
Summary: This study presents the conversion of marula nutshell waste into nitrogen-doped activated carbon (N-ACs) for supercapacitor electrode material. The N-ACs demonstrated high surface area and porosity, resulting in excellent electrochemical performance in KOH and KNO3 electrolytes. The material achieved remarkable energy and power densities in 2.5 M KNO3 electrolyte, making it a promising energy storage material for supercapacitors.
ELECTROCHIMICA ACTA
(2023)
Review
Chemistry, Physical
Jie Ying, Jiang-Bo Chen, Yu-Xuan Xiao, Susana I. Cordoba I. de Torresi, Kenneth I. I. Ozoemena, Xiao-Yu Yang
Summary: This review summarizes recent developments in the field of Ru-based electrocatalysts for the oxygen evolution reaction (OER). The characteristics of Ru-based OER catalysts, such as the OER mechanism, intrinsic activity, and stability issue, are discussed. Recently reported Ru-related catalysts falling in the Ru metal and Ru compound subclasses are described, with a focus on activity/stability-enhancing strategies. Several challenges and future perspectives in this field are summarized. It is anticipated that this review will contribute to a better understanding of Ru-based OER catalysts and inspire new strategies for designing active and stable Ru-materials.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Review
Chemistry, Physical
Mengxue He, Kenneth Ikechukwu Ozoemena, Doron Aurbach, Quanquan Pang
Summary: The limited solubility of polysulfides in conventional electrolyte solutions hampers the energy density of lithium-sulfur batteries under low-electrolyte conditions. Highly solvating electrolyte solutions (HSEs) have been proposed as a solution due to their high polysulfide solubility. However, challenges remain in understanding the sulfur reaction pathways, kinetics, and reactivity with lithium. This opinion paper summarizes the recent progress in developing HSEs for lithium-sulfur batteries and discusses their potential and possible improvements.
CURRENT OPINION IN ELECTROCHEMISTRY
(2023)
Article
Engineering, Environmental
Fu -Fei Pu, Yu-Xuan Xiao, Xiong Yang, Fei Yu, Lei Xia, Jiang -Bo Chen, Lu Wu, Jing -Jing Xie, Wen-Ying Zhao, Yu Liu, Li-Ying Wang, Jie Ying, Mei -Jing Liao, Kenneth I. Ozoemena, Ge Tian, Fazhou Wang, Xiao-Yu Yang
Summary: The utilization of electronic energy and mass transfer in electrocatalytic PtNi nanoalloys is crucial for their high performance. However, achieving these goals in Pt-based electrocatalysts remains a challenge. In this study, we prepared gourd-shaped hollow PtNi nanocomposites modified with semiconductors (BiVO4, CdS, and TiO2). Among them, BiVO4 modified PtNi showed optimal electron and mass transfer due to the similarity in work functions and unique hollow structure. This nanocomposite exhibited remarkable electrocatalytic performance in the hydrogen evolution reaction, with low overpotential and high stability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Fei Yu, Yu-Xuan Xiao, Jiang-Bo Chen, Ge Tian, Xiong Yang, Fu-Fei Pu, Jin-Yi Ouyang, Kenneth I. Ozoemena, Mark D. Symes, Roberto M. Torresi, Fazhou Wang, Xiao-Yu Yang
Summary: Incorporation of sulfur can optimize the electronic structure and surface physicochemical properties of PtNi nanoalloys, leading to improved performance in the electrocatalytic hydrogen evolution reaction (HER) in seawater.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Analytical
Thapelo P. Mofokeng, Sebenzile Shabalala, Aderemi B. Haruna, Patrick Mwonga, Zikhona N. Tetana, Kenneth I. Ozoemena
Summary: In this study, α-manganese oxide nanowires pre-intercalated with sodium and potassium ions (Na+/K+@α-MnO2) were successfully synthesized using a two-step method. The effects of different aqueous electrolytes on the energy storage properties of the nanowires were investigated. The results showed that KOH electrolyte exhibited higher specific capacitance and K+ ions exhibited more favorable pseudocapacitive behavior compared to Na+ ions. Furthermore, an asymmetric capacitor device based on N-CNTs@CF//Na+/K+@α-MnO2 showed excellent cycling performance and high specific energy and power densities.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Engineering, Electrical & Electronic
U. Nwankwo, Agnes C. Nkele, Christopher J. Arendse, Kenneth I. Ozoemena, A. B. C. Ekwealor, Rajan Jose, Malik Maaza, Fabian I. Ezema
Summary: This study investigates the modification of electrical and optical properties of the electron transport layer (ETL) in solution-processible solar cells by doping p-type dopants with varying crystal radii and charges. Among the dopants, yttrium-doped titanium dioxide shows an enhanced photo-conversion efficiency, and it provides valuable insights for optimizing yttrium doping level and fabrication conditions.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Siwaphiwe Peteni, Okoroike C. C. Ozoemena, Tobile Khawula, Aderemi B. B. Haruna, Frankie J. J. Rawson, Leshweni J. J. Shai, Oluwafunmilola Ola, Kenneth I. I. Ozoemena
Summary: Human papillomavirus (HPV) is the main cause of cervical cancer. This study immobilized the antigenic HPV-16 L1 peptide on different electrode platforms and successfully detected the anti-HPV-16 L1 antibody and its reverse detection. Both platforms showed wide linear concentration range, excellent sensitivity, and extremely low limit of detection. The OLC-PAN platform modified with HPV-16 L1 protein demonstrated high detection specificity and has the potential for screening purposes. This research represents a significant step towards developing point-of-care diagnostic devices for cervical cancer screening and HPV biomarker testing.
Article
Chemistry, Physical
Adewale K. K. Ipadeola, Ahmed Gamal, Aboubakr M. M. Abdullah, Aderemi B. B. Haruna, Kenneth I. I. Ozoemena, Kamel Eid
Summary: In this study, Ni-MOF-HNC encapsulated Pd nanocrystals were prepared by microwave irradiation, annealing, and chemical etching for efficient CO oxidation at low temperature. The obtained material had hollow carbon sheets, high surface area, rich active sites, and uniformly distributed ultra-small Pd nanocrystals. Compared with other catalysts, Pd/Ni-MOF-HNC exhibited lower T-100 for complete CO conversion under atmospheric pressure. This study opens new avenues for the utilization of MOF-HNC as a support for Pd-based catalysts.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Adewale K. Ipadeola, Aderemi B. Haruna, Aboubakr M. Abdullah, Rashid S. Al-Hajri, Roman Viter, Kenneth I. Ozoemena, Kamel Eid
Summary: In this study, porous CeO2/OLC was prepared as a support and nanoreactor for PdNiO, and it exhibited high activity for electrochemical CO oxidation due to the electronic interaction between PdNiO and CeO2/OLC support.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Review
Electrochemistry
Adewale K. Ipadeola, Kamel Eid, Aderemi B. Haruna, Aboubakr M. Abdullah, Kenneth I. Ozoemena
Summary: This mini-review provides an update on the recent advancements in optimizing the electrocatalytic CO oxidation of Pd-based nanostructures in different electrolytes. It focuses on controlling synthesis methods and morphologies to enhance the reaction efficiency, and discusses the challenges and future prospects for commercial applications.
