Article
Chemistry, Multidisciplinary
Xin Fu, Ruisong Li, Yucang Zhang
Summary: This study explores the preparation of an efficient support for the Pt catalyst of polymer electrolyte membrane fuel cells (PEMFCs) using an aerosol-assisted method. The supports are made of titania nanoparticles and mesoporous niobium-doped titania nanoparticles. The study investigates the structural characteristics and electrochemical properties of the supports, and demonstrates that the non-carbon support with a strong metal-support interaction effect can enhance the electrical conductivity.
Article
Chemistry, Physical
Ramon Azpiroz, Enrique Carretero, Ana Cueva, Aida Gonzalez, Manuel Iglesias, Jesus J. Perez-Torrente
Summary: The magnetron sputtering technique is successfully used to prepare porous TiO2 thin films on soda-lime glasses. The morphology of the thin layers is influenced by deposition parameters, and the best angle and oxidation level achieve desired porosity and film thickness. The presence of a porous film is essential for achieving photocatalytic activity.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Chemical
Hamid Reza Godini, Anirudh Venkat Prahlad, Vesna Middelkoop, Oliver Goerke, Sirui Li, Fausto Gallucci
Summary: Plasma electrolytic oxidation (PEO) was used to create a porous metal oxide layer on titanium and zirconium workpieces, such as wires, porous tubes, and 3D-printed structures, in order to improve their performance in high-temperature catalytic conversion or separation applications. The PEO-treated layer provided the desired morphology, thickness, and porosity for subsequent coating processes. The experimental setup included a 2 kilowatt AC-power source and various characterization techniques were used to analyze the surface features of the PEO-treated samples.
Article
Chemistry, Multidisciplinary
Yanting Lyu, Taka-Aki Asoh, Hiroshi Uyama
Summary: The hierarchically porous TiO2 monolith prepared using a cellulose template showed potential for water remediation, with controllable pore structures that could be adjusted by changing fabrication parameters. Its photocatalytic performance in degrading methylene blue in a flow system was evaluated.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Inorganic & Nuclear
Yue Xu, Yang Li, Yong Qian, Shanshan Sun, Ning Lin, Yitai Qian
Summary: A porous SiO/TiO2-x composite with a deficient TiO2-x coated on the surface of SiO was synthesized through a unique chemical etching and hydrolysis method. This composite material can effectively address the issues of volume expansion and poor conductivity of SiO particles. The internal pores of SiO can accommodate volume changes and shorten lithium ion diffusion pathways, while the outer TiO2-x layer provides protection and promotes the formation of stable SEI films.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Engineering, Environmental
M. Garcia-Rollan, F. J. Garcia-Mateos, R. Ruiz-Rosas, J. M. Rosas, J. Rodriguez-Mirasol, T. Cordero
Summary: Alkalis in lignosulfonate enable the easy preparation of sustainable MgO-containing carbon catalysts by carbonization and gasification. Different carbon spheres with varied properties were obtained through different temperatures of treatment. The carbon spheres showed high selectivity to acetone as a catalyst for 2-propanol decomposition, and CO2-activated carbon spheres exhibited the highest activity and selectivity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Payam Samadi, Michal J. Binczarski, Aleksandra Pawlaczyk, Jacek Rogowski, Malgorzata I. Szynkowska-Jozwik, Izabela A. Witonska
Summary: A porous TiO2 layer was prepared by plasma electrolytic oxidation (PEO), followed by deposition of Pd on the TiO2 surface layer using the adsorption method. The Pd/TiO2/Ti catalyst exhibited high activity for the oxidation of CO to CO2 in air with 5% CO. The optimal Pd concentration on the catalyst surface was found to be approximately 0.14% wt., and increasing the PdCl2 concentration did not further improve the catalyst activity.
Article
Materials Science, Multidisciplinary
Fedor Ptashchenko
Summary: This study investigates the reactions that can occur on hydrogenated silicon surfaces in aqueous solutions of HF under the influence of both negative and positive ionic complexes using quantum-chemical calculations. It was revealed that the H -> F substitution reaction has a high energy barrier, making classical electrochemical dissolution of silicon unlikely. Additionally, it was found that barrier-free reactions of direct fluorination can occur on certain silicon faces, shedding light on the mechanism of silicon etching and the factors affecting the rate of electrochemical etching of silicon.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Enhui Hou, Zhiguo Kong, Jianfeng Wu, Hairui Wang, Ping Nie, Ming Lu, Limin Chang
Summary: Mxenes, a class of two-dimensional carbon-nitrogen compounds, were studied for the detection of paraquat (PQ) using an Ag-TiO2/MXene composite material. The detection limit reached 0.01 μM and the linear range was 0.05 to 15 μM. The composite material exhibited excellent anti-interference properties and its performance can be attributed to the synergistic effect of Ag and TiO2 on MXene.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Siti Hasanah Osman, Siti Kartom Kamarudin, Sahriah Basri, Nabila A. Karim
Summary: Fuel cells have shown great potential for green energy generation, but their low reaction performance hinders large-scale commercial manufacturing. This study focuses on a new fabrication method for a TiO2-graphene aerogel (TiO2-GA) supporting PtRu catalyst, which is simple, environmentally friendly, and cost-effective. The experimental outcomes demonstrate that PtRu/TiO2-GA offers higher surface area and better performance than commercial PtRu/C catalysts.
Article
Chemistry, Physical
Zhoulu Wang, Peng Xu, Xiangan Yue, Aoning Wang, Yutong Wu, Xiang Liu, Yi Zhang
Summary: Si/C composite with Ni nanoparticles as anode for lithium-ion batteries was studied. The optimum electrochemical performance was achieved at a calcination temperature of 550℃, with high capacity and excellent rate performance. The addition of Ni nanoparticles improved the electronic conductivity of the composite.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Materials Science, Multidisciplinary
Iva Betova, Martin Bojinov, Vasil Karastoyanov, Evelina Slavcheva
Summary: Mixed Mo-Ti oxides are successfully synthesized in nano-porous TiO2 templates by electrochemical deposition, and their properties are characterized. These films exhibit good photoelectrocatalytic activity for UV and visible light. The rate constants of charge transfer and recombination are quantitatively determined using IMPS measurements and correlated with a mechanistic model of oxygen evolution.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Ceramics
Joon-Hwan Choi, Jiseop Hwang, Giyeong Kim, Jong-Jin Choi, Cheol-Woo Ahn, Jong-Woo Kim, Byung-Dong Hahn, Woon-Ha Yoon, Yuho Min
Summary: Titanium honeycomb substrates with TiO2 surface containing nanoto micro-sized pores were prepared by electrochemical anodization, demonstrating significantly enhanced catalyst adhesion strength without sacrificing catalytic performance under high exhaust gas flow rates.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Daibing Luo, Wangjing Ma, Liangzhuan Wu, Daichuan Ma
Summary: In this study, a flexible PET substrate coated with a V2O5 film with a porous network was prepared using the EPLSD method. The precursors used for network construction were PVC and V2O5 nanosheets prepared through H2O2 and UV treatment. The morphology and crystalline phase of the V2O5 sample were characterized using SEM, TEM, and XRD, revealing the formation of micropores and a high orientation of lattice plane in the film's interconnection structure. Additionally, the wettability of the film was found to be repeatedly switchable through UV irradiation and O2 storage conditions.
APPLIED SURFACE SCIENCE
(2021)
Review
Chemistry, Multidisciplinary
Justin C. Bui, Eric W. Lees, Lalit M. Pant, Iryna V. Zenyuk, Alexis T. Bell, Adam Z. Weber
Summary: Electrochemical synthesis using renewable energy to convert feedstocks into chemicals and fuels is promising, but understanding phenomena in porous electrode systems is challenging. Continuum modeling aids in understanding observed behaviors and guiding next-generation device design. Simulating multiscale phenomena in porous electrodes helps understand and improve the performance of electrochemical synthesis devices.
