Article
Chemistry, Physical
Jiaxin Song, Kai Zhang, Zhongye Huang, Jinyu Zhao, Zhengyi Yang, Lingbo Zong, Jianbin Chen, Congxia Xie, Xiaofei Jia
Summary: A Pd/Cu bimetal-loaded porous organic polymer catalyst was prepared and used in the oxidation of alkynes with O2 as the oxidant to produce 1,2-diketones. The catalyst exhibited high surface areas, hierarchical porosity, and good thermal stability.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Review
Chemistry, Physical
Ubong J. Etim, Peng Bai, Oz M. Gazit, Ziyi Zhong
Summary: This article discusses the importance of oxidation reactions in the origin of life and industrial applications. The development of green catalysis enables catalytic reactions to be conducted at mild conditions. Activating oxygen molecules under mild conditions remains a major challenge in catalytic oxidation reactions.
CATALYSIS REVIEWS-SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Shohei Ohno, Haruyasu Asahara, Tsuyoshi Inoue, Kei Ohkubo
Summary: Chlorocarboxylation of toluene was achieved by photoirradiation of a chlorine dioxide radical (ClO2) under ambient conditions (298 K and 1 atm), resulting in the formation of 2- and 4-chlorobenzoic acids in a 1:1 yield ratio. This metal-free and mild condition synthesis provides a single-step approach.
Article
Multidisciplinary Sciences
Yanyan Zhao, Sheng Dai, Ke R. Yang, Sufeng Cao, Kelly L. Materna, Hannah M. C. Lant, Li Cheng Kao, Xuefei Feng, Jinghua Guo, Gary W. Brudvig, Maria Flytzani-Stephanopoulos, Victor S. Batista, Xiaoqing Pan, Dunwei Wang
Summary: Atomically dispersed catalysts have shown high activity for selective oxidation of carbon monoxide with excess hydrogen, but their stability is not ideal. This study demonstrates that introducing a structural component to minimize the diffusion of the active metal center significantly improves stability without compromising activity. By using a dinuclear iridium heterogeneous catalyst as a study platform, two types of oxygen species, interfacial and bridge, are identified to work together for both activity and stability. This work provides important insights into the synergistic effect between the active metal center and the supporting substrate, with potential broad applications for atomically dispersed catalysts.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Review
Chemistry, Multidisciplinary
Jie Liu, Arnar Guomundsson, Jan-E. Backvall
Summary: This Minireview summarizes recent advances in homogenous aerobic oxidative reactions assisted by electron transfer mediators, emphasizing the cooperative catalytic process and the use of coupled catalyst systems to increase efficiency. The review also highlights progress in photochemical and electrochemical oxidative functionalization, showcasing the mechanisms of these transformations.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Afsar Ali, Divyansh Prakash, Piyali Majumder, Soumya Ghosh, Arnab Dutta
Summary: The development of a stable molecular copper catalyst with a labile diimine-dioxime ligand framework enables rapid and complete electrocatalysis for both oxygen reduction and water oxidation. Computational investigations highlight the importance of the interactive ligand scaffold in accommodating variable oxidation states of copper and influencing the dynamics of O-O bond cleavage/formation during catalysis. This study establishes a template for designing molecular catalysts to mediate energy-relevant multi-electron/multi-proton reactions in both oxidizing and reducing environments.
Article
Chemistry, Organic
Lamprini-Panagiota Apostolina, Artemis Bosveli, Antonia Profyllidou, Tamsyn Montagnon, Vasileios Tsopanakis, Maria Kaloumenou, Dimitris Kalaitzakis, Georgios Vassilikogiannakis
Summary: High value oxygenated polycycles can be rapidly and efficiently accessed from simple precursors using a new and mild method for butenolide synthesis mediated by thiols. The combination of initial photooxygenation and butenolide synthesis with subsequent photoredox reactions allows for rare dual-photocatalyst cascades, leading to fused butyrolactones and substituted cyclopentanones.
Article
Chemistry, Multidisciplinary
Gollapalli Narasimha Rao, Govindasamy Sekar
Summary: A highly stable and reusable Pd-nanoparticle (Pd-BNP) catalyzed oxidation method using DMSO as an oxidant has been developed for the synthesis of 1,2-dicarbonyl compounds from 1,2-diarylalkynes. The Pd-BNP catalytic system also demonstrated efficient oxidation of alkenes and deoxy benzoin derivatives to 1,2-dicarbonyl compounds without any external additives.
NEW JOURNAL OF CHEMISTRY
(2023)
Review
Chemistry, Physical
Paul Kavanagh
Summary: Fuel cells have the potential to provide sustainable clean energy, but the reliance on Pt as an electrocatalyst for half-cell reactions poses challenges. Bio-inspired molecular catalysts, made of Earth-abundant elements, are being explored as alternative electrocatalysts. Progress in this area focuses on electrodes modified with molecular catalysts and fuel cells incorporating surface-confined molecular catalysts for both anodic and cathodic reactions. Prospect and challenges of using molecular catalysts in fuel cell assemblies are discussed.
CURRENT OPINION IN ELECTROCHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Yali Liu, Yuenan Zheng, Danyang Feng, Liangliang Zhang, Ling Zhang, Xiaowei Song, Zhen-An Qiao
Summary: The study found that mesoporous Co3O4 catalyst exhibited excellent catalytic activity for the selective oxidation of aromatic alkanes, particularly the conversion of ethylbenzene to acetophenone with a conversion rate of 42% and a selectivity of 90% at 120 degrees Celsius. Furthermore, it was discovered that mCo(3)O(4) followed a unique catalytic pathway of direct oxidation from aromatic alkanes to aromatic ketones, as opposed to the conventional stepwise oxidation to alcohols and then to ketones. This implied that mCo(3)O(4) had a higher kinetic favorability for the direct oxidation of ethylbenzene to acetophenone compared to non-selective oxidation on commercial Co3O4.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Jiaojiao Song, Yixuan Yang, Shoujie Liu, Lei Li, Nan Yu, Yuteng Fan, Zhiming Chen, Long Kuai, Baoyou Geng
Summary: This study investigates the impact of dispersion and support on the activity of Pt in CO oxidation reaction, revealing that reducible TiO2 significantly influences Pt activity with lower apparent activation barriers, and that single-atom dispersion of Pt maximizes active sites.
Article
Engineering, Environmental
Xinyuan Lv, Miao Yu, Yali Guo, Minghao Sui
Summary: In this study, silver-doped cobalt ferrite catalysts were synthesized and used for the activation of peroxymonosulfate in the degradation of sulfamethoxazole. The results showed that Ag-0.06-CoFe2O4 exhibited the best catalytic activity and utilization efficiency, and the silver doping led to the exposure of more active sites and an increase in the concentration of oxygen vacancies.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Deqing Hu, Xuefeng Jiang
Summary: Stepwise oxygenation at the benzylic position of aromatic molecules was achieved under ambient conditions via uranyl photocatalysis, producing carboxylic acids, ketones, and alcohols. The tunability of catalytic activity in uranyl photocatalysis, adjusted by solvents and additives, ensured the accuracy of the stepwise oxygenation. Hydrogen atom transfer between the benzylic position and the uranyl catalyst facilitated oxygenation, as confirmed by kinetic studies.
Review
Engineering, Environmental
Haoxi Dai, Ning Li, Jingya Ye, Jianhui Zhao, Xu He, Xiaoguang Duan, Beibei Yan, Guanyi Chen, Shaobin Wang
Summary: Recently, confined catalysts with large surface areas and adjustable pore and channel sizes have been used in advanced oxidation processes for water and wastewater treatment. In this review, the authors summarize the contaminant degradation behaviors in different confined catalytic systems, elaborate on the entire AOPs with confined catalysis, and provide suggestions and perspectives for the application of confined catalysis in AOPs.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Organic
Jie-Sheng Tian, Yu He, Zhi-Yuan Gao, Xu Liu, Shuang-Feng Dong, Peng Wu, Teck-Peng Loh
Summary: A metal-free, water-tolerant, one-pot process for ortho-acylation of phenols has been developed, promoted by the iodine source/hydrogen peroxide system. This transformation involves ether formation, iodocyclization, C-C bond cleavage, and oxidative hydrolysis in a one-step manner, as supported by control experiments.
