Article
Chemistry, Multidisciplinary
Yuyu Chen, Xiaobing Zeng, Yawen Liu, Rongkai Ye, Qianwei Liang, Jianqiang Hu
Summary: The study achieved structure transformation between Au-Pd alloy and core-shell icosahedral nanoparticles through a one-step aqueous-phase strategy, providing a way to modulate Pd's electronic structure and enhance its electrocatalytic ability towards the hydrogen evolution reaction.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Darien K. Nguyen, Vibin Vargheese, Vinson Liao, Panagiotis Dimitrakellis, Sagar Sourav, Weiqing Zheng, Dionisios G. Vlachos
Summary: The study demonstrates that nonthermal, atmospheric He/O-2 plasma (NTAP) is an efficient and controllable method for removing organic ligands like PVP from nanoparticles, without altering the shape and size of the nanoparticles, making it a more efficient alternative to traditional calcination.
Article
Chemistry, Physical
Bobby D. Cox, Charles R. Martin, Massimo F. Bertino, Joseph E. Reiner
Summary: Traditional mass spectroscopy faces challenges in distinguishing isomers with identical mass to charge ratios, but biological nanopores can effectively identify subtle differences at the single molecule limit. This study demonstrates that continuous exposure to freely diffusing ligand complexes stabilizes gold clusters, while isolated clusters disintegrate or exit the nanopore within seconds, impacting long-term stability.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Kalvakunta Paul Reddy, Catherine Swetha, Arumugam Murugadoss
Summary: Here, a rational and highly sustainable method is reported for the gram-scale synthesis of solid chitosan polymer-supported palladium nanoparticles (Pd/Chit) without the use of toxic solvents or expensive purification processes. The Pd nanoparticles are deposited onto a chitosan polymer using ascorbic acid and NaOH. The Pd/Chit catalyst demonstrates enhanced catalytic activity and selectivity due to the novel interface structure at the Pd-chitosan site and the greater number of accessible active sites at the Pd NP sites.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Viktor Sabadasch, Maxim Dirksen, Pascal Fandrich, Thomas Hellweg
Summary: This work presents core-shell microgels with tailor-made architecture and properties for the incorporation of palladium nanoparticles, resulting in enhanced catalytic activity and recyclability.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Yidong Chen, Sarah Lerch, Zafer Say, Christopher Tiburski, Christoph Langhammer, Kasper Moth-Poulsen
Summary: Encapsulation of metal nanoparticles in mesoporous silica shells is an effective strategy for stabilizing them for high temperature catalytic applications. These protective shells provide structural support and efficient reactant transport, resulting in higher thermal stability and catalytic activity compared to surfactant-stabilized nanoparticles.
Article
Chemistry, Physical
Selina K. Kaiser, Jessi E. S. van der Hoeven, George Yan, Kang Rui Garrick Lim, Hio Tong Ngan, Sadhya Garg, Mustafa Karatok, Michael Aizenberg, Joanna Aizenberg, Philippe Sautet, Cynthia M. Friend, Robert J. Madix
Summary: Unraveling metal nuclearity effects is crucial for identifying active sites and developing high-performance heterogeneous catalysts. In this study, a platform of nanostructured palladium/gold alloy nanoparticles was used to assess the impact of palladium ensemble size on the catalytic performance in the hydrogenation of benzaldehyde. The results showed that Pd single atoms were inactive, while small Pd clusters exhibited optimal catalytic activity. The bimetallic catalyst also showed improved selectivity and stability compared to pure Pd nanoparticles.
Article
Chemistry, Multidisciplinary
Youhui Zhou, Yao Cheng, Ju Xu, Hang Lin, Yuansheng Wang
Summary: Recent discoveries have uncovered the temperature-dependent upconversion luminescence behavior of inert-core/active-shell UCNPs, where both the sensitizer and activator are located near the nanoparticle surface, leading to a stronger luminescence thermal enhancement tendency compared to active-core UCNPs. This thermal enhancement behavior appears to be core-size dependent and is suggested to be attributed to the alleviation of surface quenching induced by lattice thermal expansion, based on the relationship between size-dependent luminescence and lattice expansion coefficient.
Article
Nanoscience & Nanotechnology
Ryan G. Ellis, Swapnil D. Deshmukh, Jonathan W. Turnley, Dwi S. Sutandar, Jacob P. Fields, Rakesh Agrawal
Summary: A new method has been developed to synthesize anion impurity-free CuInS2 (CIS) nanoparticles directly, bypassing the need for ligand exchange completely. The use of thermally degradable thioacetamide (TAA) ligands has successfully enabled the preparation of a carbon-free CIS nanoparticle film for a CuInSe2 photovoltaic device with a total area power conversion efficiency of 7.1%. The developed methods represent a paradigm shift in the synthesis of metal sulfide nanomaterials and the subsequent solution processing of photovoltaics without the need for ligand exchange.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Vamakshi Yadav, Soojin Jeong, Xingchen Ye, Christina W. Li
Summary: In this study, the extent of galvanic replacement reactions between Ag-0 nanoparticles and Pd, Pt, and Au ions was tuned through tailored complexation of metal cations with organic amine and phosphine ligands. This synthetic method serves as a general strategy to synthesize bimetallic Ag@AgM or Ag@M (M = Pd, Pt, Au) core-shell nanoparticles and exhibits good mass-activity in the electrocatalytic hydrogen evolution reaction.
CHEMISTRY OF MATERIALS
(2022)
Article
Polymer Science
Khaled D. Khalil, Hoda A. Ahmed, Ali H. Bashal, Stefan Braese, AbdElAziz A. Nayl, Sobhi M. Gomha
Summary: Calcium oxide (CaO) nanoparticles have attracted much interest due to their catalytic activity. In this research, a chitosan-calcium oxide nanocomposite was synthesized under microwave irradiation. The nanocomposite showed good catalytic performance in thiazole production, with high yields and mild reaction conditions.
Article
Chemistry, Multidisciplinary
Jie Gao, Rui Ma, Lu Feng, Yuefeng Liu, Ralf Jackstell, Rajenahally V. Jagadeesh, Matthias Beller
Summary: This study introduces a general protocol for the selective hydrogenation and deuteration of alkenes, utilizing a specific nickel-graphitic shell-based core-shell-structured catalyst to achieve high yields of corresponding alkanes and deuterium-labeled alkanes at ambient conditions. The synthetic utility and practicability of this Ni-based hydrogenation protocol is demonstrated through gram-scale reactions and efficient catalyst recycling experiments.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Gauravjyoti D. Kalita, Podma P. Sarmah, Golap Kalita, Pankaj Das
Summary: A facile ligand-assisted approach was used to synthesize bimetallic Au-Pd nanoparticles with a tunable core@shell structure. The Au-Pd materials exhibited superior performance in two important reactions, with the Pd-core-Au-shell structure showing higher activity compared to the Au-core-Pd-shell structure.
NANOSCALE ADVANCES
(2021)
Article
Chemistry, Multidisciplinary
Yuting Hu, Madison J. Wong, Bruce H. Lipshutz
Summary: A new technology has been reported that enables Negishi couplings to be conducted under sustainable and greener conditions using recyclable water as the medium and a low Pd loading. The results demonstrate the functional group tolerance associated with these couplings and the characterization of the reagent used.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
M. Dolores Fernandez-Martinez, Cyril Godard
Summary: A simple procedure was used to synthesize two series of ligand-capped supported Pd nanoparticles catalysts, which were tested in formate synthesis. Among these series, PPh3 showed the most appropriate stabilizing ligand, while TiO2 was the most efficient support for these catalysts. The hydrogenation of CO2 was conducted under mild reaction conditions (1.8 MPa CO2, 1.8 MPa H-2, 60 degrees C) using water as a solvent and a base, resulting in excellent selectivity towards formates with a TON of 1032 (TOF of 69 h(-1), [HCOOK]=1.1 mol/l).
Article
Nanoscience & Nanotechnology
Skylar T. Chuang, Young-Seok Shon, Vasanthy Narayanaswami
INTERNATIONAL JOURNAL OF NANOMEDICINE
(2017)
Article
Chemistry, Physical
May S. Maung, Young-Seok Shon
JOURNAL OF PHYSICAL CHEMISTRY C
(2017)
Article
Chemistry, Multidisciplinary
Vivian Chen, Hanqing Pan, Roxanne Jacobs, Shahab Derakhshan, Young-Seok Shon
NEW JOURNAL OF CHEMISTRY
(2017)
Article
Chemistry, Physical
Ting-An Chen, Young-Seok Shon
CATALYSIS SCIENCE & TECHNOLOGY
(2017)
Review
Chemistry, Multidisciplinary
Khin Aye San, Young-Seok Shon
Article
Chemistry, Multidisciplinary
Mohammed A. Mahdaly, Jie S. Zhu, Vincent Nguyen, Young-Seok Shon
Article
Chemistry, Multidisciplinary
Edwin Avila, Christos Nixarlidis, Young-Seok Shon
Summary: The catalytic activity and selectivity of two different water-soluble palladium nanoparticles capped with different ligands were investigated. The nanoparticles exhibited high regioselectivity in transforming allyl benzene to 3-phenylpropanal, and the yields reached up to 83%. The presence of benzylic hydrogen played a crucial role in the formation of a p-allyl Pd intermediate and the anti-Markovnikov addition of H2O.
Article
Chemistry, Multidisciplinary
Dominick D. Ortega, Nicholas Pavlakovich, Young-Seok Shon
Summary: This study investigates the structure-property relationships of lipid-nanoparticle assemblies (LNAs) and their catalytic activity in hydrogenation reactions. It is found that LNAs with palladium nanoparticles show decreased colloidal stability but increased catalytic activity. Temperature plays a significant role in the conversion yield of substrates in LNAs, with higher temperatures leading to higher conversion rates.
Review
Nanoscience & Nanotechnology
Al-Mahmnur Alam, Young-Seok Shon
Summary: This article summarizes a variety of interesting catalytic studies employing solubilized and freely movable noble metal nanoparticle catalysts for organic reactions in water-based systems. The impact of different ligands on the catalytic activity and selectivity of semi-heterogeneous nanoparticles in water is discussed in detail, with a categorization based on synthetic method and type of reaction. Systems using polymers, dendrimers, and ionic liquids as supporting or protecting materials are excluded from the review.
ACS APPLIED NANO MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Kevin M. Vargas, Khin Aye San, Young-Seok Shon
ACS APPLIED NANO MATERIALS
(2019)
Review
Materials Science, Biomaterials
Kevin M. Vargas, Young-Seok Shon
JOURNAL OF MATERIALS CHEMISTRY B
(2019)
Article
Nanoscience & Nanotechnology
Hanging Pan, Serena Low, Nisala Weerasuriya, Bingli Wang, Young-Seok Shon
Article
Chemistry, Physical
Ting-An Chen, Young-Seok Shon
Article
Nanoscience & Nanotechnology
Khin Aye San, Vivian Chen, Young-Seok Shon
ACS APPLIED MATERIALS & INTERFACES
(2017)
Article
Chemistry, Physical
May S. Maung, Tommy Dinh, Christian Salazar, Young-Seok Shon
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2017)