Article
Chemistry, Physical
Iryna Tomashchuk, Liudmyla Kostenko, Jean-Marie Jouvard, Luc Lavisse, Maria del Carmen Marco de Lucas
Summary: This study evaluates the efficiency of different chemical reactions for grafting alkyl chains on laser-treated titanium surface. Both silanization and phosphonation reactions increase the hydrophobicity of the surface, but modification with octylphosphonic acid in water solution is more suitable.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Yuwei Qiu, Bo Yuan, Hua Mi, Jung-Hoon Lee, Shang-Wei Chou, Yung-Kang Peng
Summary: This study resolves the debate on the activity of Fe3O4 nanoparticles as peroxidase mimetics and provides an atomic view into their origin. The redox between H2O2 and Fe(II) sites on the Fe3O4 surface was identified as the key step in producing OH radicals.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Inorganic & Nuclear
Sharad S. Amin, Jamie M. Cameron, Richard B. Cousins, James Wrigley, Letizia Liiro-Peluso, Victor Sans, Darren A. Walsh, Graham N. Newton
Summary: The self-assembly of amphiphilic, organofunctionalized hybrid polyoxometalates on various types of carbon materials leads to the formation of hierarchical nanostructures. These nanostructures exhibit significant influence on electrochemical behavior and stability, suggesting a new approach for fabricating hierarchically modified electrode surfaces.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Nanoscience & Nanotechnology
Anand Parkash
Summary: Electrocatalysts with high ORR and OER activities are crucial for renewable energy technologies, and the Pt/Cu/NPC-900 catalyst, designed using CTAB-capped ultra-low Pt and Cu nanoparticles on Zn-MOF-74, shows superior catalytic performance, stability, and potential for rational bifunctional electrocatalyst development.
Article
Materials Science, Multidisciplinary
Tomoki Kawamoto, Anjana Krishnadas, Chia-Hsiu Hsu, Markel Pardo-Almanza, Yuita Fujisawa, Guoqing Chang, Takayuki Harada, Yoshinori Okada
Summary: Epitaxial PdCoO2 thin films with high crystalline quality and bipolar surface with mixed termination were studied using in situ angle-resolved photoemission spectroscopy. A surprisingly prominent bulklike single hexagonal large Fermi surface with suppressed surface state was observed. The sharp Fermi surface observation relies on the minimized atomic scale disorder in the high-quality film surface. The predominantly two-dimensional bulk electronic state with the Fermi group velocity parallel to the plane of PdCoO2 makes the near-surface bulklike state less sensitive to the scattering by longer length scale random bipolar surface potentials. These findings are invaluable for accelerating the search for exotic functionalities in epitaxial ultrathin films and heterostructures of metallic delafossites.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Engineering, Chemical
Yan Xu, Youlin Chen, Cheng Ma, Wenming Qiao, Jitong Wang, Licheng Ling
Summary: Simultaneous removal of NH3 and H2S at room temperature is important for industrial production safety and environmental protection. In this study, adsorbents with metal chlorides and metal oxides loaded in activated carbon fiber mat were prepared and shown to efficiently remove NH3 and H2S. The adsorbents have a large surface area and hierarchical porous structure, allowing for effective adsorption of NH3 and H2S.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Review
Chemistry, Physical
Geoffroy Roger Pointer Malpass, Artur de Jesus Motheo
Summary: Active anode materials, particularly those containing Ru and/or Ir oxides, are widely used in environmental electrochemistry for wastewater treatment. Recent studies have focused on enhancing mineralization capacity and producing free chlorine species for indirect organic reduction.
CURRENT OPINION IN ELECTROCHEMISTRY
(2021)
Article
Chemistry, Analytical
Shanshan Jia, Shu Li, Anji Gao, Baojie Shen, Hongying Zhong
Summary: Metal ions on surfaces of different materials are crucial for determining their physical and chemical properties. Characterizing these surface-bound metal ions and their electron transfer is essential for understanding their relationship to macroscopic properties and applications. A new mass spectrometric technique has been developed to monitor metal ion-coupled electron transfer and gather information on their spatial distributions, identities, quantities, valences, redox activities, and associated anions. This technique offers insights into ligand-metal/metal-ligand and ligand-bridged electron transfers through mass spectrometry and tandem mass spectrometry experiments. It has been successfully applied to various applications such as monitoring hot electron transfer, residual positive metal ions in localized surface plasmon resonance, and photocatalytic activities of different facets of TiO2.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Runjia Lin, Liqun Kang, Tianqi Zhao, Jianrui Feng, Veronica Celorrio, Guohui Zhang, Giannantonio Cibin, Anthony Kucernak, Dan J. L. Brett, Furio Cora, Ivan P. Parkin, Guanjie He
Summary: This study investigates the competition between electrocatalytic organic compound oxidation reactions (OCORs) and oxygen evolution reaction (OER) using NiWO4-catalysed urea oxidation reaction (UOR) as an example. The competition is attributed to insufficient surface concentration of dynamic Ni3+. To address this issue, a controllable reconstruction of pseudo-crystalline bimetal oxides design strategy is proposed, resulting in an optimised electrocatalyst with significantly improved performance in alkaline urea electrolysis.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Physical
Dongyu Liu, Devan Solanki, Eli Stavitski, Mingtao Li, Shu Hu, Victor S. Batista, Ke R. Yang
Summary: This study demonstrates that alloyed TiO2 electrodes with subsurface redox-active transition metals can enable water oxidation to H2O2 at low overpotentials. The first-row transition metals (Cr, Mn, Fe, and Co) act as reservoirs of oxidizing equivalents that couple to substrate binding sites. The distinct sites for substrate binding and redox state transitions reduce the overpotential of the critical first step of water oxidation and enhance the selectivity for H2O2.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Engineering, Environmental
Miao Li, Jiacheng Li, Jiaxin Huang, Boyang Wu, Fei Chen, Xiang Liu
Summary: This study develops a new Cu-doped bimetallic oxide catalyst for electrochemical conversion of nitrate to ammonia, which shows high ammonia yield and stable cathode efficiency.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Weiqin Wei, Zhen Wei, Ruizhe Li, Zhenhua Li, Run Shi, Shuxin Ouyang, Yuhang Qi, David Lee Philips, Hong Yuan
Summary: The study demonstrates that metallic In-embedded In2O3 nanoflake catalyst effectively extracts electrons from subsurface oxygen defects, increasing electron density of surface active sites and improving electronic coupling with CO2. This opens up new insights for electronic manipulation of oxygen defects in catalytic reactions.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Carolyn L. Hartley, Jillian L. Dempsey
Summary: This study investigates defects on the surfaces of semiconductor quantum dots using redoxactive chemical probes and spectroscopic tools, revealing the impact of different sizes and reductant strengths on ligand displacement, as well as the conclusion that large quantum dots have more native disulfide defects.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
Dewmi A. Ekanayake, Arundhoti Chakraborty, Jeanette A. Krause, Hairong Guan
Summary: This study identified a series of copper borohydride complexes capable of catalyzing the hydrogenation of aldehydes, with some catalyst mixtures showing higher efficiency, although certain functional groups may inhibit the reaction. Modifying the catalyst structure can impact its catalytic activity.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Jonathan Ruiz Esquius, David J. Morgan, Gerardo Algara Siller, Diego Gianolio, Matteo Aramini, Leopold Lahn, Olga Kasian, Simon A. Kondrat, Robert Schloegl, Graham J. Hutchings, Rosa Arrigo, Simon J. Freakley
Summary: The oxygen evolution reaction (OER) is crucial for future energy systems based on water electrolysis. Iridium oxides show promise as catalysts due to their corrosion resistance in acidic and oxidizing conditions. The transformation of highly active iridium (oxy)-hydroxides prepared using alkali metal bases into rutile IrO2 at high temperatures (>350 degrees C) results in poor activity, but the transformation into Li-intercalated IrOx retains comparative activity and improved stability. This nanocrystalline lithium iridate form could be more resistant to industrial procedures and help stabilize the high populations of redox active sites in amorphous iridium (oxy)hydroxides.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Organic
Fuying Zhu, Yamei Lin
Summary: In this study, a low-metal iron-supported catalyst (Fe20/NC-Mg) was reported for the efficient synthesis of quinoxaline compounds, using water as a solvent and without additional bases. The synergistic effect of FeNx site and Mg (OH)2 nanorods in the catalyst played a key role in achieving high yields (82-91%) in 16 examples. The gram-level synthesis and reusability of the catalysts after four cycles demonstrated its industrial application potential.
Article
Chemistry, Organic
Mikhail Kozlov, Alexey Tyurin, Andrey Dmitrenok, Vyacheslav Rusak, Aleksander Fedorov, Igor Zavarzin, Yulia Volkova
Summary: This study presents a novel and practical synthesis method for phosphorus-substituted 1,3,4-thiadiazolines using phosphorylthioformic acid hydrazides and ketones. The protocol demonstrates operational simplicity, availability of reagents, and tolerance towards different functional groups.
Article
Chemistry, Organic
Jisna Jose, Thomas Mathew
Summary: 2-Cyclopentenone and its derivatives are highly esteemed synthetic intermediates with exceptional utility in organic synthesis. They are favored structural motifs in numerous pharmaceutical drugs and natural products, highlighting their significance. The review discusses the various methods used to synthesize cyclopentenones from 2016 to 2023.
