Article
Materials Science, Multidisciplinary
Shasha Ge, Yufen Chen, Yun Guo, Jordi Llorca, Lluis Soler
Summary: Ultrasmall Au clusters supported on ceria were synthesized via a solvent-free mechanochemical method, showing high activity for COPrOx and CO oxidation as well as good reducibility. Aging treatment of ball-milled samples improved catalytic activity, attributed to a change in the oxidation state of Au between fresh and aged catalysts.
APPLIED MATERIALS TODAY
(2023)
Article
Chemistry, Multidisciplinary
Haiyang Wang, Dongxia Zhang, Ruiyin Zhang, Hao Ma, Huimin Zhang, Ruijuan Yao, Miaomiao Liang, Yuzhen Zhao, Zongcheng Miao
Summary: Nanorod-structured (Au-Pd)/CeO2 catalysts with different Au/Pd ratios were prepared through dealloying and calcination treatment. Characterization techniques were used to study the structure and physicochemical properties. The (Pd0.15-Au0.15)/CeO2 catalyst calcined at 500°C showed the highest catalytic activity for CO oxidation, reaching 50% and 99% conversion temperatures as low as 50°C and 85°C, respectively. This superior catalytic property is attributed to the robust nanorod structure and introduction of Pd and Au.
Article
Engineering, Environmental
Yaeun Seo, Min Woo Lee, Hyun Jae Kim, Jin Woo Choung, ChangHo Jung, Chang Hwan Kim, Kwan-Young Lee
Summary: The study showed that doping with appropriate amounts of Ag can increase the oxygen storage capacity of the catalyst and form active Pd-0 species, leading to improved catalytic activity for the oxidation of CO and C3H6.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Haiyang Wang, Jianjing Gao, Ruiyin Zhang, Hao Ma, Cheng Ma, Ruijuan Yao, Miaomiao Liang, Yuzhen Zhao, Zongcheng Miao
Summary: The nanorod-shaped (Pt-Au)/CeO2 catalysts were prepared and characterized in this study. It was found that one of the catalysts exhibited the best catalytic performance and stability. The introduction of Pt and Au, as well as the nanoscale interface between nanoparticles and nanorods, were found to enhance the catalytic reaction efficiency.
Article
Chemistry, Physical
Zhiqing Cui, Xin Wang, Ran Li, Long Kuai, Caihong Fang
Summary: A feasible one-pot approach was developed to prepare Au core/CeO2-(Au nanoclusters) nanostructures without surfactants, which exhibited significantly improved activity and stability in CO conversion. The special architecture of Au/CeO2-Au provided abundant exposed Au atoms and oxygen vacancies, ensuring effective reactant transfer and preventing aggregation or further growth during catalysis. The conversion remained at 100% even after 300 hours and 20 cycles, making this work a new pathway for designing effective catalysts with high activity and stability, especially for small-sized metal nanoclusters.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Environmental
Yanbo Deng, Pengfei Tian, Shijie Liu, Huaqiang He, Yuan Wang, Like Ouyang, Shaojun Yuan
Summary: In this study, single-atom Pd catalyst supported on Pr-doped CeO2 nanorods was prepared, and the performance and nature of Pr-coordinated atomic Pd site in CO catalytic oxidation were systematically investigated. The results showed that Pr-doping can enhance the catalytic activity of CO oxidation by reducing the formation energy of oxygen vacancies and increasing the number of oxygen vacancies around the Pd sites.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Chemical
Yanbo Deng, Lian Fu, Wenjia Song, Like Ouyang, Shaojun Yuan
Summary: Cerium oxide-based materials doped with valence metals can effectively increase the oxygen vacancy content and regulate the surface and interface structure of CeO2 supported metal catalysts. In this study, CeO2 nanorods doped with transition metals (Fe, Co, Mn) and Pr were prepared and used to support Pd, significantly enhancing the activity of CO catalytic oxidation. The co-doping of Pr and Fe increases the oxygen vacancy content on the catalyst surface, promotes the activation of lattice oxygen, and strengthens the interaction and electron transport ability between Pd and the support, leading to excellent catalytic performance in CO oxidation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Yenan Liu, Yafeng Cai, Xuan Tang, Chuntao Shao, Yang You, Li Wang, Wangcheng Zhan, Yanglong Guo, YunKun Zhao, Yun Guo
Summary: The study found that the dispersion state of Pd species has a significant impact on the propane oxidation over Pd/CeO2 catalyst, leading to different surface intermediates and activities.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Mingzhi Wang, Peijie Ma, Zhuangzhuang Wu, Shasha Chu, Yanping Zheng, Zhaohui Zhou, Weizheng Weng
Summary: The determination of dynamic changes in supported Pd catalysts during the CO/Hydrocarbons oxidation reactions is crucial for the development of efficient catalysts for vehicle exhaust purification. This study found that Pd/CeO2 catalysts, prepared by modulating the interaction between Pd precursors and CeO2 support, exhibited different dynamic properties under CO oxidation conditions, and also showed different deactivation behaviors in the presence of C3H6. The chemical states of Pd species on CeO2 during CO oxidation were found to correlate with their redox properties, which significantly influenced the role of C3H6 and H2O in the reactions.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Yu -Ching Weng, Chieh-Lin Chiang
Summary: This study utilizes SECM to screen ternary metal catalyst arrays for formic acid oxidation. Pd-Co-Au and Pd-Co-Cu ternary metal catalyst arrays are prepared and reduced on a glassy carbon substrate. The optimal ratio of Pd2Co6Au2 and Pd2Co6Cu2 catalysts in the respective arrays is determined for efficient formic acid oxidation. The surface morphology of these catalysts is complex and diverse, mainly consisting of heterostructures of different metal oxides. These catalysts exhibit higher oxidation current and lower onset potential compared to a pure Pd catalyst. Electrochemical impedance spectroscopy analysis reveals their pseudo inductive behavior and the Pd2Co6Cu2 catalyst shows the lowest charge transfer resistance and removes adsorbates at the lowest overpotential.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Chemical
Si -Wei Lin, Jui-Lin Chao, Shu-Chi Ku, Nico Li, Albert T. Wu
Summary: This study investigates the corrosion resistance of ultra-thin Co layers on printed circuit boards. The results show that Co can sustain a corrosive environment with certain concentrations of SO2, making it a promising alternative anti-corrosive material.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Chemistry, Multidisciplinary
Srisin Eaimsumang, Nuwong Chollacoop, Apanee Luengnaruemitchai, Stuart H. Taylor
Summary: This study demonstrates a simple hydrothermal synthesis approach for preparing CeO2-supported gold (Au) catalysts, which exhibit enhanced catalytic performance in oxidation reactions when the reducibility of CeO2 support increases and the number of adsorbed peroxide species on the support increases due to Au addition.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Applied
Sungha Hwang, Yongwoo Kim, Jaeha Lee, Eunwon Lee, Hyokyoung Lee, Changho Jeong, Chang Hwan Kim, Do Heui Kim
Summary: This study reveals that CO can enhance the NOx adsorption ability of Pd/CeO2 catalyst at low temperatures. A mechanism is proposed based on the changing CO oxidation ability with increased NOx adsorption over Pd/CeO2.
Article
Chemistry, Physical
Sangbeom Yoo, Eunwon Lee, Gyu Hyun Jang, Do Heui Kim
Summary: In this study, Pd/CeO2 catalysts were prepared using different Pd precursors and their effects on catalytic activity were investigated. The catalyst prepared using palladium nitrate showed high activity for CH4 oxidation, while the catalyst prepared using palladium acetate exhibited high activity for CO oxidation. This difference in activity can be attributed to the variation in Pd dispersion and state caused by different precursors.
MOLECULAR CATALYSIS
(2022)
Article
Nanoscience & Nanotechnology
Lesia Piliai, Peter Matvija, Thu Ngan Dinhova, Ivan Khalakhan, Tomas Skala, Zdenek Dolezal, Oleksii Bezkrovnyi, Leszek Kepinski, Mykhailo Vorokhta, Iva Matolinova
Summary: In this study, the metal-substrate interaction and species transformation during CO oxidation on CeO2(111) surface were investigated. It was found that the interaction between gold nanoparticles and peroxo oxygen species formed on ceria step edges resulted in the formation of ionic gold species. Moreover, the addition of O2 led to the rapid growth of Au particles and the formation of large particles.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Chemical
Eid H. Alosaimi, Ibrahim Hotan Alsohaimi, Hassan M. A. Hassan, Qiao Chen, Saad Melhi, Ayman Abdelaziz Younes
Summary: A series of sulfonated polyethersulfone (SPES) membranes containing different concentrations of SBA-15-g-PSPA were fabricated using a non-solvent induced phase separation (NIPS) process for ultrafiltration (UF) applications. SBA-15 was modified with 3-methacrylate-propyltrimethoxysilane (MPS) and further functionalized with charge tailorable polymer chains. The addition of surface modified SBA-15-g-PSPA nanoparticles significantly improved the membrane's water permeability, hydrophilicity, and antifouling properties. The composite SPES membranes exhibited higher pure water fluxes compared to the pristine SPES membrane, with the inclusion of SBA-15-g-PSPA nanoparticles showing promising potential for ultrafiltration applications.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Metallurgy & Metallurgical Engineering
Hassan M. Hassan, Ibrahim H. Alsohaimi, Mohamed R. El-Aassar, Mohammed A. El-Hashemy, Thamer S. Alraddadid
Summary: This study revealed that NH2-MIL-101(Cr), an amine-functionalized chromium-based MOF (Cr(III)-MOF), is a potential corrosion inhibitor for mild steel in 1 m HCl solution.
ANTI-CORROSION METHODS AND MATERIALS
(2023)
Article
Chemistry, Physical
Afaq Ullah Khan, Kamran Tahir, Muhammad Zia Ullah Shah, Mona Y. Khalil, Zainab M. Almarhoon, Hassan M. A. Hassan, Fahad Abdulaziz, Abdulaziz A. Alanazi, Adel A. El-Zahhar, Alaa. M. Munshi
Summary: In this study, cadmium oxide (CdO) was successfully developed on copper selenide (CuSe) nanoparticles for the first time via the wet-chemical method. The CdO-CuSe nano-composite exhibited battery-type behavior with prominent redox peaks and voltage plateau. The freshly prepared CdO-CuSe electrode showed a higher capacity compared to CdO and CuSe electrodes. Moreover, the CdO-CuSe//AC hybrid supercapacitor showed high energy and power densities, and stable cycling performance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Inorganic & Nuclear
Ibrahim Hotan Alsohaimi, Mosaed S. Alhumaimess, Ayoub Abdullah Alqadami, Gharbi Tharwi Alshammari, Rawan Fawzy Al-Olaimi, Ahmed A. Abdeltawab, Mohamed Y. El-Sayed, Hassan M. Hassan
Summary: A new aminonaphthalenesulfonic acid modified magnetic-graphene oxide (Fe3O4@GO@AHSA) was successfully fabricated. Fe3O4@GO was modified with aminonaphthalenesulfonic acid (AHSA) through amidation reaction. Fe3O4@GO@AHSA showed an optimal removal efficiency for methylene blue (MB) with a maximum adsorption capacity of 220.1 mg/g.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Muhammad Arif Ullah, Munirah Sulaiman Othman Alhar, Afaq Ullah Khan, Kamran Tahir, Magdi E. A. Zaki, Eman A. Alabbad, Ebraheem Abdu Musad Saleh, Hassan M. A. Hassan, Adel A. El-Zahhar, Alaa M. Munshi
Summary: In this study, Ag/SnO2/Nb2O5-SiO2 nanocomposites were successfully synthesized by a new green hydrothermal protocol, and their reaction completion, optimized conditions, composition, morphology, geometry, and average size were characterized using various techniques. The nanocomposites exhibited excellent photocatalytic activity, with 99% degradation of alizarin red dye achieved within 20 minutes. Furthermore, the synthesized material showed high efficiency in inhibiting the growth of Bacillus subtilis and Escherichia coli, and the combination of light and nanomaterial enhanced the production of reactive oxygen species, thereby improving the photocatalytic activity.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Materials Science, Multidisciplinary
Meshal Alzaid, W. S. Mohamed, Rakan Alanazi, Ibrahim Hotan Alsohaimi, Hassan M. A. Hassan, N. M. A. Hadia, Mohammed Ezzeldien, M. R. El-Aassar, Ahmed M. Abu-Dief
Summary: In this study, (Y2O3) x (CdO) 1-x mixed oxides nanocomposites with different Y2O3 loadings were synthesized via a precipitation approach. The NCs showed crystalline and cubic-phase purity, and their crystallite size ranged from 45 to 52 nm. By adding Y2O3, the optical band gap of the NCs decreased, and the surface area and pore volume increased, indicating increased porosity. UV-vis spectroscopy revealed that Y2O3 loading significantly improved the photocatalytic activities of the NCs, and the (Y2O3) 0.2 (CdO) 0.8 NCs showed the highest photodegradation efficiency for methylene blue under solar irradiation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Environmental
M. R. El-Aassar, Omar M. Ibrahim, Basma Mohamed Omar, Hazem T. Abd El-Hamid, Ibrahim Hotan Alsohaim, Hassan M. A. Hassan, Ibrahim O. Althobaiti, Mohamed Y. El-Sayed, Mohamed E. Goher, Hala Fakhry
Summary: In this study, cost-effective and eco-friendly hybrid beads of Poly (Acrylonitrile-co-Styrene/Pyrrole)@Poly Vinyl Pyrrolidone (Poly (AN-co-ST/Py)@PVP) were fabricated for Methylene Blue dye adsorption. The physico-chemical characterization of the fabricated beads was conducted through SEM, TGA, FTIR, NMR, and AFM. Optimal adsorption conditions were determined, and Langmuir isotherm and pseudo-second order kinetic models described the adsorption equilibrium and kinetics well. The fabricated beads exhibited great effectiveness in efficiently removing MB molecules from wastewater samples.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Chemistry, Analytical
Rasha M. K. Mohamed, Sabrein H. Mohamed, Aml M. Asran, Ibrahim H. Alsohaimi, Hassan M. A. Hassan, Hossieny Ibrahim
Summary: In this study, a novel ultrasensitive electrochemical sensing platform for lacidipine (LCDP) was developed using functionalized glassy carbon (FGC) microspheres combined with ceria nanoparticles (CeO2NPs@FGC). The CeO2NPs@FGC-MWE sensor exhibited high electro-catalytic activity towards LCDP oxidation and achieved quantitative detection using adsorptive anodic stripping square-wave voltammetry. The sensor showed good selectivity, reproducibility, antifouling activity, and long-term stability.
MICROCHEMICAL JOURNAL
(2023)
Article
Biochemistry & Molecular Biology
Hassan M. A. Hassan, Ibrahim H. Alsohaimi, Amr A. Essawy, Mohamed R. El-Aassar, Mohamed A. Betiha, Alhulw H. Alshammari, Shaimaa K. Mohamed
Summary: Tailoring high-efficiency photocatalytic composites is crucial. Incorporating Zn (II) ions into TNTs can enhance their absorption of visible light and improve the photocatalytic performance. The Zn-TNTs composite shows significant degradation of RhB under visible light illumination, with a degradation rate of around 95% achieved in 120 minutes. The efficient engagement of photoexcited electrons over photogenerated holes in the photodegradation mechanism is observed.
Article
Chemistry, Multidisciplinary
Mahmoud M. Kamel, Mohamed Y. El-Sayed, Ibrahim Hotan Alsohaimi, Sabirin F. Al-Furhud, Hassan M. A. Hassan, Abdullah M. Aldawsari
Summary: A newly synthesized mesoporous carbon-glassy polyvinyl alcohol/silica gel composite was found to effectively remove methylene blue from aquatic environments. The composite was characterized using various techniques and the removal method was investigated under different conditions. The efficiency of the composite was compared to other materials and the kinetics and thermodynamics of the removal process were analyzed. The results showed that the composite exhibited high removal rates and could be considered for practical applications.
RESEARCH ON CHEMICAL INTERMEDIATES
(2023)
Article
Chemistry, Multidisciplinary
Memona Idrees, Abid Inayat, Irfan Ullah, Eman A. Alabbad, Zainab M. Almarhoon, Hassan M. A. Hassan, Adel A. El-Zahhar, Ata-ur-Rehman Ali Ata-ur-Rehman, Ali Haider, Syed Mustansar Abbas, Qin Zhang, Xuanke Li
Summary: This study demonstrates the development of a promising heterostructure anode by fabricating Fe2N in the scaffold of sulfonated graphene oxide (SGO) embedded in a polyaniline (PANI) matrix. The hierarchical nanostructure combines the high capacity, multielectron transfer capability, and ionic diffusivity of Fe2N with the conductivity and mechanical flexibility of the graphene framework. The PANI matrix acts as a glue, providing conductivity, mechanical strength, and stability, resulting in enhanced performance.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Engineering, Chemical
Ibrahim Hotan Alsohaimi, Mosaed S. Alhumaimess, Ayoub Abdullah Alqadami, Hassan M. A. Hassan, Qiao Chen, Mohammed Saeed Alamri, Majed Mohammed J. Alanzi, Thamer S. Alraddadi
Summary: A novel magnetic nanohybrid, MGO@TETA@MACS, was successfully fabricated via an in situ coprecipitation method and used for the adsorption of methylene blue from liquid phase environment. The MGO@TETA@MACS nanocomposite was characterized by XRD, FTIR, TGA, nitrogen isotherm, SEM, and Zeta potential experiments. The adsorption kinetics followed the PFO model, while the adsorption equilibrium conformed to the Langmuir isotherm. The maximum adsorption capacity of MGO@TETA@MACS was 247.37 mg/g at the ambient temperature, and thermodynamic calculations confirmed the exothermic and spontaneous nature of MB decontamination.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Analytical
Rasha M. K. Mohamed, Sabrein H. Mohamed, Aml M. Asran, Ibrahim H. Alsohaimi, Hassan M. A. Hassan, Hossieny Ibrahim, Mohamed M. El-Wekil
Summary: A novel electrochemical sensing platform based on gold nanoparticles anchored conductive carbon black modified graphite nanopowder flakes paste electrode was developed for the detection of Favipiravir (FVP). The sensor exhibited excellent sensitivity, stability, and anti-interference capability, allowing simultaneous detection of FVP and co-administered drug paracetamol (PCT). The detection limits for FVP and PCT were 7.5 nM and 4.3 nM, respectively. The sensor was successfully applied for simultaneous detection of FVP and PCT in spiked human plasma and pharmaceutical preparations, as well as in the presence of ascorbic acid in a real sample.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Shaimaa K. K. Mohamed, Amany M. A. Bashat, Hassan M. A. Hassan, Nahla Ismail, Waleed M. A. El Rouby
Summary: Water splitting using photoelectrochemical techniques is a promising method for generating green hydrogen. In this study, Ni-x/TiO2 anodized nanotubes (NTs) and Au-y/Ni-x/TiO2NTs photoanodes were prepared and characterized. The performance of these photoanodes in oxygen evolution reaction (OER) under simulated solar light was investigated, and the results showed improved efficiency compared to pristine TiO2NTs. The enhanced OER activity of Au-30/Ni-20/TiO2NTs was attributed to the synergistic effect between the local surface plasmon resonance of gold and the p-n heterojunction at the NiO/TiO2 interface.
Article
Chemistry, Physical
Yuanxing Fang, Ronan Hodgson, Wei Cheat Lee, Huyen Le, Hon Wing Boaz Chan, Hassan M. Hassan, Ibrahim H. Alsohaimi, Giacomo E. Canciani, Rong Qian, Qiao Chen
Summary: Photocatalytic water splitting has gained increasing attention as a green fuel source. In this study, TiO2 hollow hemisphere-based films were created and used for photoelectrochemical water splitting. The unique morphology and porous structure of the TiO2 hollow hemispheres improved the PEC performance by reducing charge recombination and enhancing light absorption.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
