Article
Materials Science, Multidisciplinary
Mtabazi G. Sahini, Kjell Wiik, Tor Grande
Summary: The study found that Co diffusion was significant in the La2NiO4+delta (LN) and CoO diffusion couples, while Ni diffusion was minor, leading to the formation of LaCoO3 and other compounds in the LN layer.
Article
Nanoscience & Nanotechnology
Yuanfeng Zou, Zhongwei Yue, Shuai He, Zhishan Li, Zhiyi Chen, Na Ai, Xiao Sun, William D. A. Rickard, Meiting Guo, San Ping Jiang, Kongfa Chen
Summary: In this study, an in situ electrochemical decoration strategy was used to improve the electrocatalytic activity and durability of La2NiO4+ δ (LNO) cathodes. The construction of LNO@Pt core-shell structure by electrochemical polarization significantly suppressed the detrimental effect of La surface segregation on LNO cathode. The LNO@Pt core-shell structure exhibited high durability without noticeable performance degradation over a 180-hour test.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Yanxiong Liu, Changhua Hu, Longchun Bian
Summary: The research investigates the influence of the surface Pd species state on lean CH4 combustion. The high catalytic activity of the 0.5% PdO/CeO2-RE catalyst is attributed to the uniformly dispersed Pd nanoparticles, which facilitate the interaction between CeO2-R and the Pd species.
Article
Crystallography
Giamper Escobar Cano, Yannick Brinkmann, Zhijun Zhao, Patrick A. Kissling, Armin Feldhoff
Summary: In this study, La2NiO4+delta particles with a plate-like morphology were prepared using molten-flux synthesis, and the influence of NaOH on the formation process was investigated. Various techniques including thermogravimetric analysis, powder X-ray diffraction, and electron microscopy were employed to study the structure, morphology, and composition distribution of the reaction product.
Article
Chemistry, Physical
Xin Cui, Hui Yang, Jing Zhang, Tong Wu, Peitao Zhao, Qingjie Guo
Summary: A-site substitution was used to modify the physicochemical properties and catalytic behaviors of La1-xCaxCoO3-δ perovskite catalysts, with La0.5Ca0.5CoO3-δ identified as the optimal content for toluene oxidation performance. This substitution increased surface area, pore volume, and transformed the crystal structure, leading to improved catalytic performance attributed to the rapid transformation of Co2+/Co3+ and surface oxygen species dynamics.
Article
Energy & Fuels
Rohini Khobragade, Govindachetty Saravanan, Hisahiro Einaga, Hideo Nagashima, Pravesh Shukla, Tarun Gupta, Avinash Kumar Agarwal, Nitin Labhasetwar
Summary: Research has shown that non-precious metal manganese-substituted strontium ferrite catalysts exhibit improved diesel particulate matter oxidation performance and possess potential for reducing diesel PM emissions.
Article
Materials Science, Ceramics
Emerson Luiz dos Santos Veiga, Xavier Vendrell Villafruela, Jordi Llorca, Hector Beltran-Mir, Eloisa Cordoncillo
Summary: Pyrochlore structures are promising candidates for heterogeneous catalysts in the oxidation reaction of CO to CO2. Higher iron concentrations result in better catalytic activity, and these samples are able to convert all CO oxidation reactions in a narrower temperature range.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Review
Chemistry, Multidisciplinary
Mei-Qi Zhang, Meng Wang, Bo Sun, Chaoquan Hu, Dequan Xiao, Ding Ma
Summary: This passage discusses the severe impact of massive plastic accumulation on human living conditions and presents a possible solution to recycle and upgrade plastic waste at the molecular level. It highlights three strategies for depolymerization and transformation of plastics into high-value chemicals: depolymerization into monomers, oligomers, or other derivatives followed by transformation, degradation to small platform molecules followed by upgradation, and direct transformation into high-value chemicals. The future development of catalytic upcycling strategies using plastic waste as raw materials is also discussed.
Article
Chemistry, Applied
B. N. Kuznetsov, I. G. Sudakova, N. V. Garyntseva, V. E. Tarabanko, O. V. Yatsenkova, L. Djakovitch, F. Rataboul
Summary: Two alternative routes of softwood catalytic oxidative fractionation have been assessed, which efficiently produce cellulose products and fine chemicals. The integration of different processes leads to an increase in the number of target products and improves the efficiency of production.
Review
Environmental Sciences
Eliasu Issaka, Jesse Nii-Okai Amu-Darko, Salome Yakubu, Funmilayo Omotoyosi Fapohunda, Nisar Ali, Muhammad Bilal
Summary: The advanced catalytic ozonation process shows significant effectiveness in removing refractory organic compounds and degrading toxic organic pollutants in wastewater. Heterogeneous catalytic ozonation can effectively overcome the disadvantages of homogeneous catalytic ozonation, providing higher catalytic stability and efficiency.
Article
Chemistry, Physical
Yin Xu, Jeremy Dhainaut, Jean-Philippe Dacquin, Anne-Sophie Mamede, Maya Marinova, Jean-Francois Lamonier, Herve Vezin, Hui Zhang, Sebastien Royer
Summary: A-site substituted perovskites were prepared and evaluated for formaldehyde oxidation, with La0.8K0.2MnO3 showing the highest catalytic activity. Stability tests revealed gradual deactivation of the catalysts under dry conditions, while the addition of humidity in the gas stream led to reduced deactivation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Ali Asghar Esmailpour, Jonathan Horlyck, Priyank Kumar, Constantine Tsounis, Jimmy Yun, Rose Amal, Jason Scott
Summary: This study demonstrates that engineering defects in CexSi1-xO2-delta nanocomposites can enhance the formation of reactive oxygen species and hydroxyl radicals in an ozone-filled environment. Higher silicon content in binary oxides leads to higher catalytic activity and stabilization of surface oxygen vacancies. Examining binary oxides provides insights into the contribution of oxygen vacancies and their charge state to catalytic reactions.
Article
Chemistry, Multidisciplinary
Y. B. N. Tran, Phuong T. K. Nguyen
Summary: Two isostructural lanthanide metal-organic frameworks, Ln-MOF-589, displayed promising catalytic activity for the oxidation of olefins, with Ce-MOF-589 showing outstanding performance and high selectivity. Ce-MOF-589 outperformed homogeneous and heterogeneous catalysts, as well as representative MOFs, and could be recycled for at least six cycles without significant loss of catalytic performance.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Le Zhang, Feng Huo, Anqi Wang, Shaohua Chai, Jian Guan, Guijun Fan, Wuxinchen Yang, Guojun Ma, Ning Han, Yunfa Chen
Summary: Currently, the active sites of cobalt (Co) cations in different coordination structures remain elusive and challenging, despite the potential of Co-based oxides in catalytic ozone elimination. In this study, controllable synthesis of different Co-based oxides were achieved and their valences and coordinations were verified. The ozone decomposition performances revealed that Co-Oh(3+) and Co-Oh(2+) in octahedral coordination were superior to Co-Td(2+) in tetrahedral coordination. Notably, MgCo with octahedral coordination exhibited the highest decomposition efficiency and remained stable after long-term running. The high activity of MgCo can be attributed to the d-orbital splitting, facilitating electron transfer in ozone decomposition reactions.
INORGANIC CHEMISTRY
(2023)
Review
Environmental Sciences
Maoshui Zhuo, Zhijie Chen, Xiaoqing Liu, Wei Wei, Yansong Shen, Bing-Jie Ni
Summary: This paper discusses the application of three catalytic processes (photocatalysis, electrocatalysis, and biocatalysis) in the management of microplastic pollution, and introduces the efficiency and catalytic mechanisms of different catalysts. It also proposes the development prospects for sustainable management of microplastic pollution.
ENVIRONMENTAL POLLUTION
(2024)
Article
Multidisciplinary Sciences
Masatomo Yashima, Takafumi Tsujiguchi, Yuichi Sakuda, Yuta Yasui, Yu Zhou, Kotaro Fujii, Shuki Torii, Takashi Kamiyama, Stephen J. Skinner
Summary: Oxide-ion conductors are crucial in various applications for clean energy. The high oxide-ion conductivity of the hexagonal perovskite-related oxide Ba7Nb3.9Mo1.1O20.05, attributed to interstitialcy diffusion and low activation energy for oxide-ion conductivity, is reported by the authors.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Yu Zhou, Masahiro Shiraiwa, Masanori Nagao, Kotaro Fujii, Isao Tanaka, Masatomo Yashima, Laura Baque, Juan F. Basbus, Liliana Mogni, Stephen J. Skinner
Summary: The experimental investigation showed that calcium-doped layered perovskite compounds, BaNd1-xCaxInO4-x/2, exhibit significantly improved protonic conductivity, especially in humid environments. This study provides strong evidence that the doped compounds have potential applications as fast proton conductors.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
Zonghao Shen, Ji Wu, Matthew W. Shorvon, Guillaume Cazaux, Stephen C. Parker, Stephen J. Skinner
Summary: A novel black cerium niobium oxynitride material with a perovskite crystal structure was synthesized through thermal ammonolysis, showing complex multistage redox processes at elevated temperatures in air. The incorporation of nitrogen into the oxygen sublattice led to a significant decrease in band gap and structural stability, as confirmed by experimental and theoretical studies.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
Hany Fathy Heiba, Jay C. Bullen, Andreas Kafizas, Camille Petit, Stephen J. Skinner, Dominik Weiss
Summary: The study critically examined the factors affecting the experimental determination of reaction rates for the photocatalytic oxidation of arsenite (As(III)) using TiO2 under UV radiation. The key findings include the importance of proper handling of adsorption and depletion of As(III), the potential impact of the solution composition and the light source on the oxidation rates, and the low quantum yield of the As(III) oxidation reaction.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Jia Guo, Rongsheng Cai, Eleonora Cali, George E. Wilson, Gwilherm Kerherve, Sarah J. Haigh, Stephen J. Skinner
Summary: A-site deficient double perovskite oxides are subjected to low-temperature reduction, resulting in the exsolution of nanoparticles. These nanoparticles exhibit diffusion-limited growth and consist of both nickel and ruthenium, making them rare bimetallic nanoparticles formed at such low temperatures. The reduced electrode layers show a significant decrease in area-specific resistance, indicating promising prospects for catalytic applications.
Article
Chemistry, Physical
Katherine Develos-Bagarinao, Ozden Celikbilek, Riyan A. Budiman, Gwilherm Kerherve, Sarah Fearn, Stephen J. Skinner, Haruo Kishimoto
Summary: Innovative electrode structures are actively researched for solid oxide cells (SOCs) to achieve superior performance and long-term stability. This study investigates the effects of deposition temperature and annealing on nanostructured LSC thin film electrodes, revealing the importance of surface and interface tuning for improved electrochemical performance and stability.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Editorial Material
Chemistry, Physical
Stephen J. Skinner, Viola Birss, Jennifer Rupp, Roger A. De Souza
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Materials Science, Ceramics
Duke P. C. Shih, Ainara Aguadero, Stephen J. Skinner
Summary: This study investigates the effect of A-site monovalent ions (K+ and Li+) on the electrical conductivity of NBT. The results show that partial replacement of Bi3+ with monovalent ions significantly improves the ionic conductivity, possibly due to an increase in oxygen vacancy concentration. The isotope exchange depth profile method confirms that oxygen ions are the main charge carriers.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Electrochemistry
George E. Wilson, Ieuan D. Seymour, Andrea Cavallaro, Stephen J. Skinner, Ainara Aguadero
Summary: The use of perovskite materials for thermochemical energy storage and oxygen separation has been gaining momentum due to their large oxygen exchange capacity and flexibility. This study investigates antimony-substituted strontium cobalt oxides as new materials for thermochemical oxygen separation. The results reveal exceptional redox kinetics and cyclability, with higher oxygen evolution and hindered reduction due to the inductive effect of antimony dopants. The identified material, SrCo0.95Sb0.05O3-delta, shows great potential for oxygen production under temperature-swing reaction configurations.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Nicholas J. Williams, Ieuan D. Seymour, Dimitrios Fraggedakis, Stephen J. Skinner
Summary: In this study, the activation losses at solid oxide fuel cell (SOFC) electrodes were investigated by simulating charge transfer using density functional theory (DFT). The electrostatic responses to the electric field were found to correlate with experimental data for different reduction reactions at mixed ionic-electronic conducting (MIEC) electrode surfaces. The study also highlighted the importance of decoupled ion-electron transfer and charged adsorbates on the performance of electrodes under nonequilibrium conditions. The findings have potential implications in energy storage and catalysis.
Article
Multidisciplinary Sciences
Michael High, Clemens F. Patzschke, Liya Zheng, Dewang Zeng, Oriol Gavalda-Diaz, Nan Ding, Ka Ho Horace Chien, Zili Zhang, George E. Wilson, Andrey Berenov, Stephen J. Skinner, Kyra L. Sedransk Campbell, Rui Xiao, Paul S. Fennell, Qilei Song
Summary: This study reports the preparation of durable copper-based redox sorbents using a precursor engineering approach for thermochemical looping processes. The redox sorbents showed enhanced reaction rates, stable oxygen storage capacity, and efficient gas purification over a broad temperature range.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Nicholas J. Williams, Ieuan D. Seymour, Robert T. Leah, Aayan Banerjee, Subhasish Mukerjee, Stephen J. Skinner
Summary: Non-equilibrium thermodynamics describes the current-voltage characteristics of electrochemical devices. In this study, the activation overpotential for the metal/mixed ionic-electronic conducting composite electrodes originates at the interface between the material and gas. The driving force for coupled ion-electron transfer is held at the interface, and the rate of transfer scales with the availability of free sites on the metallic surface.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Juan F. Basbus, Mauricio D. Arce, Jose A. Alonso, Miguel A. Gonzalez, Gabriel J. Cuello, Maria T. Fernandez-Diaz, Zijie Sha, Stephen J. Skinner, Liliana Mogni, Adriana C. Serquis
Summary: Understanding the protonic defect transport mechanism in Ba(Ce,Zr)O-3 perovskite oxides and defining the appropriate temperature range are important for material design and application. Structural features, lattice distortions, and proton diffusion play key roles in protonic conduction.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Meeting Abstract
Chemistry, Multidisciplinary
Stephen John Skinner, Cheng Li, Stevin Pramana
ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES
(2021)
Article
Chemistry, Physical
Andrea Cavallaro, George E. Wilson, Gwilherm Kerherve, Eleonora Cali, Celeste A. M. van den Bosch, Paul Boldrin, David Payne, Stephen J. Skinner, Ainara Aguadero
Summary: This study investigates the effect of water exposure on substituted SrCoO3 powders and thin films, revealing phase degradation under water oxidizing conditions and the formation of Sr6Co5O15. Characterization techniques show that this effect may already start superficially at the surface layer, impacting oxygen diffusivity and oxidation-reduction kinetics.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
