Article
Chemistry, Physical
Jiaqi Li, Anusheela Das, Qing Ma, Michael J. Bedzyk, Yosi Kratish, Tobin J. Marks
Summary: With the increasing importance of renewable resources, chemical research is focusing on substituting petrochemicals with biomass-derived analogues. In order to achieve this, understanding the mechanisms behind catalytic systems is crucial for rational design. This study discusses the structure and reactivity of a carbon-supported molybdenum-dioxo catalyst (AC/MoO2) and its role in alcohol dehydration, providing valuable insights for future biomass processes.
Article
Chemistry, Physical
Yo-hei Nagasaki, Masazumi Tamura, Mizuho Yabushita, Yoshinao Nakagawa, Keiichi Tomishige
Summary: The silica-supported molybdenum oxide catalyst showed high efficiency and reusability in the dehydration of various amides. The results of catalyst characterizations and activity tests revealed that the strong acid sites formed by the interaction between silanol groups and molybdenum oxide species, along with the acid-base pair sites, played a crucial role in the dehydration reaction.
Review
Chemistry, Multidisciplinary
Yiqi Liu, Amol Agarwal, Yosi Kratish, Tobin J. Marks
Summary: In this minireview, we analyze and summarize a less conventional type of SSHC in which molybdenum dioxo species are grafted onto unusual carbon-unsaturated scaffolds, such as activated carbon, reduced graphene oxide, and carbon nanohorns. The choice of earth-abundant, low-toxicity, versatile metal constituents, and various carbon supports illustrates catalyst by design principles and yields insights into new catalytic systems of both academic and technological interest. Here, we summarize experimental and computational investigations of the bonding, electronic structure, reaction scope, and mechanistic pathways of these unusual catalysts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Chemical
Fei Yan, Xiaohan Guo, Qingying Ye, Ping Li, Juanjuan Qi, Lidong Wang
Summary: In this study, supported molybdenum oxide catalysts were prepared and characterized for the efficient oxidation of DMSO in wastewater using green oxidant, H2O2. The degradation product of DMSO, DMSO2, is environmentally friendly and biodegradable, making it suitable for further removal by biological processes. The results demonstrate the potential of this catalyst for treating industrial wastewater containing DMSO.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Review
Environmental Sciences
Xiyu Sun, Guangzhi Wang, Huanzhang Feng, Xinyi Miao, Simin Zhou, Dongdong Wang, Likun Huang, Kun Wang
Summary: The utilization and high value-added development of sludge resources are environmentally friendly means for sludge treatment. Sludge-based activated carbon and catalyst have advantages in treating organic pollutants, with the reaction mechanisms involving various processes. Selection of appropriate preparation methods based on specific situations is necessary for research and development.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Inga Zinicovscaia, Nikita Yushin, Dmitrii Grozdov, Konstantin Vergel, Pavel Nekhoroshkov, Elena Rodlovskaya
Summary: The yeast Saccharomyces cerevisiae biomass was utilized for efficient removal of rhenium and accompanying elements from various systems. The biosorption process showed high removal efficiencies for rhenium, molybdenum, and copper ions under different experimental conditions, validating yeast biomass as a promising biosorbent for metal removal.
Review
Environmental Sciences
Nabila Shehata, Enas Taha Sayed, Mohammad Ali Abdelkareem
Summary: Geopolymerization technology is an effective alternative to cement with the ability to reduce CO2 emissions, lower building material costs, and minimize environmental impacts. Its key features include using alumina/silicate source materials and specific mixing and curing conditions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Physical
Kim N. R. Dumoleijn, Alberto Villa, Marcello Marelli, Laura Prati, Kristof Moonen, Christian V. Stevens
Summary: Utilizing a heterogeneous bimetallic catalyst combining palladium and copper can achieve high yields in chemoselective amination reactions, while also suppressing undesired side reactions in other chemical conversions.
Article
Engineering, Mechanical
Jiao Wang, Shunzhen Ren, Zhipeng Li, Chenchen Wang, Xuefei Huang, Chao Fu, Lei Zheng, Tianhui Ren
Summary: In this study, a new multifunctional organic molybdenum material was developed to enhance the tribological performance of biodegradable oils, with friction coefficient and wear scar diameter significantly reduced. The tribofilm is mainly composed of various metal oxides and sulfides, exhibiting a layered structure with diverse sulfur forms.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Chemistry, Physical
Xiaowen Lu, Chunmu Guo, Mingyang Zhang, Leipeng Leng, J. Hugh Horton, Wei Wu, Zhijun Li
Summary: This study presents a novel palladium catalyst with exceptional activity and selectivity for the hydrodeoxygenation of vanillin to produce 2-methoxy-4-methylphenol. The catalyst features atomically dispersed palladium single atoms and clusters, along with strong metal-support interactions, leading to superior catalytic performance and potential for the design of fully exposed metal catalysts.
Article
Chemistry, Organic
Enbo Yu, Guojiang Mao, Guo-Jun Deng, Fuhong Xiao
Summary: This paper describes a metal-free chemoselective reduction of α,β-unsaturated carbonyl compounds using water as a hydrogen donor. Various functional groups attached to substrates were well tolerated, and the corresponding products were obtained in moderate to good yields under simple reaction conditions. This reaction has great potential to be a general and practical reduction methodology in organic transformation.
ORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Materials Science, Composites
Shengtao Dai, Peikun Li, Xuyang Li, Chen Ning, Lingqiang Kong, Lanqing Fang, Yu Liu, Liu Liu, Yuhui Ao
Summary: A novel self-catalytic waterborne polyurethane was designed and utilized to prepare sizing agent for carbon fibers, showing significant improvement in mechanical properties compared to unsized composites. The use of bio-based tartaric acid in the synthesis process contributes to potential industrial production of green WPU sizing agent.
COMPOSITES COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Qingquan Yu, Wanqiang Yu, Yujie Wang, Jietong He, Yuke Chen, Haifeng Yuan, Ruiying Liu, Junjian Wang, Shunyao Liu, Jiayuan Yu, Hong Liu, Weijia Zhou
Summary: In this study, Ru-Ru2P heterogeneous nanoparticles were successfully fabricated using an ion-exchange method and an environmentally friendly in situ green phosphating strategy. The obtained catalyst showed excellent hydrogen evolution reaction (HER) performance and stability in alkaline media. Additionally, an environmentally friendly membrane electrode with a sandwich structure was assembled for industrial H-2 production.
Article
Chemistry, Organic
Fedor Kliuev, Anton Kuznetsov, Oleg I. Afanasyev, Sofiya A. Runikhina, Ekaterina Kuchuk, Evgeniya Podyacheva, Alexey A. Tsygankov, Denis Chusov
Summary: NaH2PO2 has been found to be an effective reducing agent in promoting reductive amination. It possesses characteristics of being nontoxic, stable, environmentally friendly, and readily available in large quantities, making it a potential competitor to classical reductants used in the target process. A low E factor of 1 was achieved for the substrate scope. Various carbonyl compounds reacted with amines under the developed conditions, demonstrating compatibility with a wide range of functional groups. The reaction conditions were successfully scaled up to 200-fold.
Article
Chemistry, Multidisciplinary
Sascha Kessler, Elrike R. Reinalter, Johannes Schmidt, Helmut Coelfen
Summary: The study investigates the TMAH-controlled alkaline etching of nickel hexacyanoferrate mesocrystals, revealing the formation of hollow framework structures with increased surface area and retention of morphology. The etched mesoframes show significant catalytic activity in the degradation of organic pollutants and have potential applications in environmental remediation.
Article
Chemistry, Physical
Shengsi Liu, Jiaqi Li, Titel Jurca, Peter C. Stair, Tracy L. Lohr, Tobin J. Marks
CATALYSIS SCIENCE & TECHNOLOGY
(2017)
Article
Chemistry, Multidisciplinary
Bo Zhao, Peng Zhai, Pengfei Wang, Jiaqi Li, Teng Li, Mi Peng, Ming Zhao, Gang Hu, Yong Yang, Yong-Wang Li, Qianwen Zhang, Weibin Fan, Ding Ma
Article
Chemistry, Multidisciplinary
Yosi Kratish, Jiaqi Li, Shanfu Liu, Yanshan Gao, Tobin J. Marks
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2020)
Article
Chemistry, Multidisciplinary
Yosi Kratish, Takayuki Nakamuro, Yiqi Liu, Jiaqi Li, Issei Tomotsuka, Koji Harano, Eiichi Nakamura, Tobin J. Marks
Summary: The molybdenum dioxo catalyst CNH/MoO2, prepared by grafting (dme)MoO2Cl2 onto carbon nanohorn surfaces, exhibits excellent catalytic activity for various reactions and serves as an informative model catalyst for structural and mechanistic investigations.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2021)
Article
Chemistry, Multidisciplinary
Yiqi Liu, Jiaqi Li, Anusheela Das, Hacksung Kim, Leighton O. Jones, Qing Ma, Michael J. Bedzyk, George C. Schatz, Yosi Kratish, Tobin J. Marks
Summary: The study demonstrates the importance of molecularly derived single-site heterogeneous catalysts in bridging the understanding and performance gaps between conventional homogeneous and heterogeneous catalysis. The characterization of single-site Mo(=O)(2) species grafted onto reduced graphene oxide (rGO/MoO2) provides valuable insights into the structural properties and catalytic performance of the catalyst.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)