Article
Chemistry, Multidisciplinary
Robert Bericat-Vadell, Pandiaraj Sekar, Yeersen Patehebieke, Xianshao Zou, Nidhi Kaul, Peter Broqvist, Rebecka Lindblad, Andreas Lindblad, Anna Arkhypchuk, Carl-Johan Walletin, Jacinto Sa
Summary: The relevance of photoredox catalysis in organic synthesis research and innovation will increase. Current processes rely on expensive noble metal complexes to initiate cascade transformations. This study proposes a novel photosystem based on surface-modified gold nanoparticles, improving charge separation and enabling single electron transfer reactions, expanding the range of photocatalysts available for photoredox catalysis.
MATERIALS TODAY CHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Jun Kyu Kim, Sangwoo Kim, Seunghyun Kim, Hyung Jun Kim, Kyeounghak Kim, WooChul Jung, Jeong Woo Han
Summary: Metal oxide surfaces undergo spontaneous reorganization during reactions, complicating the understanding of reaction mechanisms and material properties. This review categorizes the surface reorganization into three types and summarizes their effects on different reactions, providing novel insights for the design of metal-oxide-based catalytic materials.
ADVANCED MATERIALS
(2023)
Article
Energy & Fuels
Irum Shaheen, Khuram Shahzad Ahmad, Camila Zequine, Ram K. Gupta, Andrew G. Thomas, Mohammad Azad Malik
Summary: The synthesis of ZnO:NiO-PdO-Pd nano electrode material was achieved using a greener organic synthesis fuel extracted from leaves of Euphorbia cognata Boiss. The electrode displayed good energy storage potential and conductivity, demonstrating its substantial potential in energy storage.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
Miguel Sanchez-Fuente, Alberto Lopez-Magano, Alicia Moya, Ruben Mas-Balleste
Summary: Condensation of BINAPO-(PhCHO)(2) and 1,3,5-tris(4-aminophenyl)benzene(TAPB) leads to a new imine-based chiral organic material (COM) that can be post-functionalized through reductive transformation of imine linkers to amines. Although the imine-based material is not stable enough to be used as a heterogeneous catalyst, the reduced amine-linked framework can be efficiently utilized in asymmetric allylation of various aromatic aldehydes. The obtained yields and enantiomeric excesses are comparable to those observed for the molecular BINAP oxide catalyst, with the added advantage of recyclability offered by the amine-based material.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Inorganic & Nuclear
Binbin Cao, Lingjian Zeng, Haidong Liu, Jingrui Shang, Liang Wang, Jianping Lang, Xueqin Cao, Hongwei Gu
Summary: In this study, platinum nanoribbons were successfully synthesized using a one-pot method with ammonium fluoride as the regulator under hydrogen atmosphere. The resulting zigzag-shaped two-dimensional Pt nanoribbons exhibited superior electrocatalytic activity and stability due to their unique morphology.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Yu Gao, Yuzhi Liu, Haiyang Yu, Donglei Zou
Summary: Entropy stabilized catalytic systems, specifically high entropy oxides (HEOs), have gained significant attention due to the demand for functional materials in chemical catalysis. This review provides an overview of the structural characteristics and recent applications of HEOs in thermal/electro/photo-catalysis and supports. Additionally, future prospects in environmental catalysis, such as visible light catalysis and catalytic wet air oxidation (CWAO), are proposed.
APPLIED CATALYSIS A-GENERAL
(2022)
Review
Chemistry, Multidisciplinary
Vincentas Maciulis, Almira Ramanaviciene, Ieva Plikusiene
Summary: Nanostructured materials formed from metal oxides offer advantages such as large surface area, improved physical properties, and adjustable electronic properties. This review discusses various types of metal oxide nanostructures classified based on size and composition and their application in chemical sensors and biosensors. The synthesis methods of metal oxide nanostructures and their integration in sensor design are also analyzed in detail.
Article
Energy & Fuels
Irum Shaheen, Khuram Shahzad Ahmad, Camila Zequine, Ram K. Gupta, Andrew G. Thomas, Mohammad Azad Malik
Summary: In this study, MoO3/PdO nanomaterial was synthesized using sol gel synthesis method with foliar fuel of E. cognata. The material exhibited low internal resistance and moderate supercapacitor potential with efficient diffusion of electrons and ions, as indicated by electrochemical characterizations.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Organic
Milan Bera, Ho Seong Hwang, Tae-Woong Um, Soo Min Oh, Seunghoon Shin, Eun Jin Cho
Summary: A new type of sp(3)-like N-centered radical was generated through selective energy transfer catalysis, which led to the synthesis of valuable 3-oxyindole derivatives.
Article
Multidisciplinary Sciences
Shan Zhou, Jiahui Li, Jun Lu, Haihua Liu, Ji-Young Kim, Ahyoung Kim, Lehan Yao, Chang Liu, Chang Qian, Zachary D. Hood, Xiaoying Lin, Wenxiang Chen, Thomas E. Gage, Ilke Arslan, Alex Travesset, Kai Sun, Nicholas A. Kotov, Qian Chen
Summary: This study demonstrates the self-assembly of tetrahedral gold nanoparticles into chiral superlattices with different connection patterns on solid substrates. The chiral superlattices show strong mirror asymmetry and chiral properties. The thermodynamic equilibrium of the assembly is controlled by van der Waals and electrostatic interactions between nanoparticles, and the chirality can be fine-tuned by adjusting the corner-to-edge connections.
Article
Chemistry, Inorganic & Nuclear
Sourav Chakraborty, Ellen M. Matson
Summary: In this study, the reductive silylation for oxygen defect formation on the surface of a polyoxometalate was successfully demonstrated. The addition of a silicon-based compound led to the quantitative formation of oxygen-deficient vanadium oxide assemblies, shedding light on the mechanism of defect formation and its consequences on stability and reactivity of the cluster surface. This work provides new insights into surface activation of reducible metal oxides and offers new chemical routes for creating oxygen atom vacancies in polyoxometalate ions.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Inorganic & Nuclear
Mamoona Azad, Ghazanfar Ali Khan, Faiza Ismail, Waqqar Ahmed
Summary: This article demonstrates the fabrication of silver nanoparticles (NPs) on cotton fabric through impregnation of Ag ions and reduction. By using different concentrations of precursor solution, the NP concentration on the substrate can be easily adjusted. The fabricated substrates exhibit excellent catalytic degradation performance, reusability, and shelf-life, making them ideal for dye degradation applications.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Review
Chemistry, Physical
Hao Wan, Wei Ma, Kechao Zhou, Yijun Cao, Xiaohe Liu, Renzhi Ma
Summary: To address the energy crisis and environmental issues, clean and sustainable energy-related materials and devices are urgently needed. Silicon, a promising advanced material with abundant reserves and diverse micro-nanostructures, shows high performance in energy-related fields. This article systematically presents the crystal structures and reduction approaches for silicate minerals, as well as recent progress on the as-reduced silicon products for clean energy storage/conversion.
GREEN ENERGY & ENVIRONMENT
(2022)
Review
Nanoscience & Nanotechnology
Zhandong Li, Dmitry Kurouski
Summary: The review critically discusses recent progress in understanding hot carrier-driven chemistry and catalytic processes at the nanoscale. Experimental and theoretical findings are presented to demonstrate novel plasmon-driven reactivity for redox, coupling, elimination, and scissoring reactions. Additionally, the impact of these findings on plasmonic catalysis and TERS imaging is discussed in the review.
Review
Chemistry, Applied
Jitender Singh, Roshan Patel, Anuj Sharma
Summary: Heterocyclic N-oxides have wide applications in various fields and their C-2 functionalization and deoxygenation reactions have attracted significant attention. This review categorizes and discusses these reactions.
ADVANCED SYNTHESIS & CATALYSIS
(2022)
Article
Materials Science, Multidisciplinary
J. Buchinger, A. Wagner, Z. Chen, Z. L. Zhang, D. Holec, P. H. Mayrhofer, M. Bartosik
Summary: The use of superlattice architectures can enhance the hardness and fracture toughness of ceramic thin films. The mechanisms behind the toughness-enhancing effect are still partially unexplored, but by designing superlattices with identical elastic moduli but different lattice parameters, an enhanced fracture toughness was observed. The understanding of the coherency strains in the nanolayers within the superlattice structure is crucial for the observed toughness enhancement.
Article
Materials Science, Multidisciplinary
P. Panfilov, T. P. Tolmachev, V. P. Pilyugin, Z. Chen, Z. L. Zhang
Summary: The deformation behavior of coarse-grained rhenium under high-pressure torsion at room temperature was examined, showing that this refractory HCP-metal exhibits ductile behavior and can withstand severe deformation, while forming an ultra-fine grain structure in the samples.
Article
Chemistry, Multidisciplinary
Mahboobeh Ejtemaei, Sepehr Sadighi, Mehdi Rashidzadeh, Sirous Khorram, Jan O. Back, Simon Penner, Michael F. Noisternig, Dariush Salari, Aligholi Niaei
Summary: This study investigates the surface treatment of kaolin and attapulgite/zeolite A extrudates using argon glow discharge plasma. The results show that plasma treatment increases surface area and pore volume, but decreases the weak acidic site density of the extrudates. The plasma-treated sample exhibits improved resistance to coke formation compared to the untreated one.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Chemistry, Physical
Pengfei Cao, Pengyi Tang, Maged F. Bekheet, Hongchu Du, Luyan Yang, Leander Haug, Albert Gili, Benjamin Bischoff, Aleksander Gurlo, Martin Kunz, Rafal E. Dunin-Borkowski, Simon Penner, Marc Heggen
Summary: By using a combination of in situ characterization techniques, we investigated the surface and bulk dynamics of LaNiO3 material during heating in vacuo, revealing the Ni exsolution dynamics on both local and global scales. The remaining perovskite grains exhibited a drastic shrinkage and compression of structure after the Ni exsolution, mainly occurring at grain boundaries and stacking faults.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Parastoo Delir Kheyrollahi Nezhad, Maged F. Bekheet, Nicolas Bonmassar, Albert Gili, Franz Kamutzki, Aleksander Gurlo, Andrew Doran, Sabine Schwarz, Johannes Bernardi, Sebastian Praetz, Aligholi Niaei, Ali Farzi, Simon Penner
Summary: The role of earth alkaline doping in perovskite-based dry reforming of methane catalysts was investigated. The study found that doping can lead to the formation of stable carbonated species and hinder the sintering of Ni particles, but it has a stabilizing effect on the particle size of Ni.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Nikola Koutna, Lukas Loefler, David Holec, Zhuo Chen, Zaoli Zhang, Lars Hultman, Paul H. Mayrhofer, Davide G. Sangiovanni
Summary: This study investigates the plasticity and crack growth mechanisms of B1 AlN(001)/TiN(001) superlattices under mechanical loading. The simulations reveal an anisotropic response of the superlattice in different tensile directions and suggest that controlling the thicknesses of the superlattice components can hinder crack growth.
Article
Chemistry, Physical
Asghar Mohammadi, Ali Farzi, Christoph Thurner, Bernhard Kloetzer, Sabine Schwarz, Johannes Bernardi, Aligholi Niaei, Simon Penner
Summary: We manipulate the structure and performance of Pd - perovskite interfaces using different preparation methods to achieve optimum NO+CO reactivity in the presence of water. It is found that the extended interface sample aided by H2O can reduce CO poisoning, and the optimized use of lattice oxygen and replenishment from NO dissociation leads to the formation of more poisoning-resistant active sites. Additionally, reaction of species from H2O dissociation with adsorbed CO assists further surface clean off. This study is of great importance for improving catalytic activity and selectivity.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Nicolas Koewitsch, Stefan Barth, Kevin Ploner, Raoul Blume, Detre Teschner, Simon Penner, Marc Armbruester
Summary: Heterogeneous catalysts are complex materials, and the role of single components is difficult to determine. In methanol steam reforming, intermetallic In-Pt compounds play a crucial role in Pt/In2O3 materials with excellent CO2-selectivity.
Article
Chemistry, Multidisciplinary
Neda Kalantari, Maged F. Bekheet, Parastoo Delir Kheyrollahi Nezhad, Jan O. Back, Ali Farzi, Simon Penner, Nagihan Delibas, Sabine Schwarz, Johannes Bernardi, Dariush Salari, Aligholi Niaei
Summary: In this study, chromium and boron were introduced into the hierarchical structure of ZSM-5 to enhance the catalysts' performance in the methanol-to-propylene process. The crystal structure and orientation of the synthesized zeolites were analyzed, revealing that the introduction of chromium and boron resulted in changes in the crystallinity and symmetry of the zeolites. The impregnated chromium-ZSM-5 catalyst showed superior performance in the production of light olefins, while the introduction of boron further improved the propylene selectivity and ratio.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Chemistry, Physical
Philipp Zambaldi, Leander Haug, Simon Penner, Bernhard Kloetzer
Summary: A series of ultra-clean Cu-doped and Pd-doped Ni model catalysts were investigated to understand the impact of metal doping on carbon tolerance and catalytic activity in methane dry reforming. It was found that carbon solubility, support effects, segregation processes, cyclic operation temperatures, and electronic and ensemble effects all play a crucial role in the catalytic activity and stability of these systems. Minor Cu promotion can suppress coking, but high Cu loadings facilitate carbon growth and severe catalytic deactivation. An optimal and stable NiCu composition allows for a high syngas production rate while suppressing coking. Unsupported NiPd and Pd model catalysts have high carbon deposition rates and solubility, resulting in severe carbon deposition and catalytic deactivation.
Article
Materials Science, Multidisciplinary
Zhuo Chen, Yonghui Zheng, Yong Huang, Zecui Gao, Huaping Sheng, Matthias Bartosik, Paul H. Mayrhofer, Zaoli Zhang
Summary: The mechanical properties of superlattice TMN coatings can differ significantly depending on their as-deposited structures, which can be attributed to distinct deformation and strengthening mechanisms. In this study, the strengthening mechanisms of single-crystalline and polycrystalline superlattice coatings under nanoindentation loads were investigated. The results showed that dislocation behaviors, such as accumulation and crossing interfaces, were responsible for the strengthening of single-crystalline coatings, while no pronounced strengthening was observed in polycrystalline coatings. The researchers further discovered a monoclinic phase transformation occurring in the single-crystalline coating, which altered the structure of the superlattice interface and facilitated dislocation accumulation. This study provides insights into the atomic-scale strengthening mechanism of TMN superlattice coatings.
Article
Materials Science, Multidisciplinary
Zhuo Chen, Yonghui Zheng, Yong Huang, Zecui Gao, Huaping Sheng, Matthias Bartosik, Paul H. Mayrhofer, Zaoli Zhang
Summary: At present, the theoretical predictions of the mechanical properties of transition-metal nitride superlattices primarily rely on the intrinsic properties of perfect epitaxial nanolayers. However, the experimentally determined strength, such as hardness, often deviates significantly from the theoretical predictions due to a lack of understanding of the specific strengthening mechanism. In this study, by using focused ion beam sectioning combined with transmission electron microscopy, the structural evolution of two representative TiN/AlN superlattice coatings, namely single-crystalline and polycrystalline superlattices, under identical loads was observed. It was found that the single-crystalline superlattice formed a larger 'intermixed' region compared to the polycrystalline superlattice, where the layer structure transformed into a solid solution under loads. The deformation of the single-crystalline superlattice involved distortion of the superlattice interfaces, polycrystalline deformation (grain rotation) in the solid solution, and superlattice slip deformation, while columnar grain boundary sliding was the primary deformation mechanism in the polycrystalline superlattice. The relatively large solid-solution zone in the single-crystalline superlattice was attributed to severe interfacial deformation. This research reveals the atomic-scale deformation behavior of transition-metal nitride superlattices.
Article
Chemistry, Physical
Kevin Ploner, Andrew Doran, Martin Kunz, Albert Gili, Aleksander Gurlo, Nicolas Koewitsch, Marc Armbruester, Johannes Bernardi, Maximilian Watschinger, Simon Penner
Summary: This study compared the performance of different intermetallic compounds in methanol steam reforming, finding that Cu2In exhibited the highest activity, while Cu7In3 and Cu11In9 showed stable performance with high CO2 selectivity. No significant self-activation of the intermetallic compounds was observed, but through redox activation, the catalytic performance was further enhanced. The formation of In2O3 patches under MSR conditions helped to explain the least deactivation of the interface with the highest indium content.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Kevin Ploner, Parastoo Delir Kheyrollahi Nezhad, Albert Gili, Franz Kamutzki, Aleksander Gurlo, Andrew Doran, Pengfei Cao, Marc Heggen, Nicolas Kowitsch, Marc Armbruster, Maximilian Watschinger, Bernhard Klotzer, Simon Penner
Summary: The study demonstrates that different morphologies of Cu/ZrO2 catalysts can be obtained by various calcination temperatures, and Cu/amorphous ZrO2 catalysts exhibit superior MSR activity and long-term stability compared to other morphologies.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Materials Science, Multidisciplinary
Jun Wang, Albert Gili, Matthias Gruenbacher, Sebastian Praetz, Jan Dirk Epping, Oliver Gorke, Gotz Schuck, Simon Penner, Christopher Schlesiger, Reinhard Schomacker, Aleksander Gurlo, Maged F. Bekheet
Summary: Nickel-containing silicon oxycarbonitride ceramic nanocomposites were synthesized through a room temperature chemical reaction and pyrolysis at elevated temperatures, exhibiting catalytic activity in dry methane reforming. Materials derived from different precursors showed differences in pore structure, with Durazane 1800-Ni precursor samples having microporous structure and PHPS-Ni precursor samples having nonporous structure. The materials with nickel nanoparticles in situ formed in the ceramic matrix are promising candidates for heterogeneous catalysis.
MATERIALS ADVANCES
(2021)
