Article
Biochemistry & Molecular Biology
Theodoros Tsolis, Neofyta Nikolaou, Konstantinos Ypsilantis, Anastasia Kougioumtzi, Dimitrios Kordias, Angeliki Magklara, Achilleas Garoufis
Summary: The different heterobimetallic complexes showed varying stability and activity when studied for their biological properties. Coordination of 9-MeG led to decomposition of some complexes, forming new complexes, with (6)Cl exhibiting higher cytotoxicity in cancer cells.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2021)
Article
Chemistry, Physical
Rodrigo Antunes, Roland Steiner, Laurent Marot, Ernst Meyer
Summary: This study investigates the decomposition of pure NH3 and ND3 using Pt/Al2O3 and Ru/Al2O3 catalysts on alumina. The results show that the decomposition with Ru/Al2O3 has higher efficiency and weaker inhibition effect.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Multidisciplinary Sciences
Mingjin Cui, Chunpeng Yang, Sooyeon Hwang, Menghao Yang, Sean Overa, Qi Dong, Yonggang Yao, Alexandra H. Brozena, David A. Cullen, Miaofang Chi, Thomas F. Blum, David Morris, Zou Finfrock, Xizheng Wang, Peng Zhang, Vitaliy G. Goncharov, Xiaofeng Guo, Jian Luo, Yifei Mo, Feng Jiao, Liangbing Hu
Summary: Nanoscale multi-principal element intermetallics (MPEIs) can be synthesized as ultrasmall and stable nanoparticles through a disorder-to-order phase transition approach, offering a broad and tunable compositional space of active, high-surface area materials with potential applications.
Article
Chemistry, Physical
Rebecca Y. Hodgetts, Hoang-Long Du, Tam D. Nguyen, Douglas MacFarlane, Alexandr N. Simonov
Summary: This study investigates the mechanism, kinetics, and suitable catalysts for the hydrogen oxidation reaction (HOR) in organic media relevant to the nitrogen reduction reaction (NRR). The results suggest that a high-performance catalyst for the H2 oxidation as an anode process for the Li-mediated NRR is likely to emerge through the design of multicomponent systems, facilitating the kinetics of both HOR pathways and suppressing poisoning of the catalytic surface.
Article
Materials Science, Multidisciplinary
Y. T. Li, T. Li, W. Li, L. J. Fan, S. Y. Zhang, S. M. Jiang, J. Gong, C. Sun
Summary: Pt modified aluminide (Pt-Al) coatings were prepared on third- and fourth-generation single crystal superalloys by electroplating Pt and successive aluminization. The isothermal oxidation behaviors of both coatings were investigated at 1100 celcius for 350 h. The Pt-Al coating on the fourth-generation single crystal superalloy demonstrated superior oxidation resistance. Ru diffusion into the Pt-Al coating during isothermal oxidation increased spallation resistance of oxide scale. The effects of Ru on the anti-spallation property of oxide scale and the interdiffusion between coating and substrate were discussed. The diffusion process of Ru was investigated.
Article
Thermodynamics
S. Aria Hosseini, Sarah Khanniche, Jeffrey Snyder, Samuel Huberman, Alex Greaney, Giuseppe Romano
Summary: In this study, the thermal conductivity reduction in porous alloys is calculated and analyzed by considering the scattering of phonons at different length scales. The effectiveness of a Ballistic Correction Model (BCM) is validated, which provides guidance for the design of alloy-based nanostructures. The research demonstrates that through the synergy of scattering at different scales, materials with ultra-low thermal conductivity can be designed.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Review
Biochemistry & Molecular Biology
Olga Klaudia Szewczyk, Piotr Roszczenko, Robert Czarnomysy, Anna Bielawska, Krzysztof Bielawski
Summary: Nanotechnology shows great potential in advanced cancer therapies, allowing for simultaneous drug administration and immune system engagement. Nanoparticles can locate metastases and deliver medications, effectively reducing tumors with minimal toxicity to healthy tissue.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Physical
Yu Wang, Chun Du, Zhang Liu, Yanfei Liu, Bin Shan, Limin Guo, Rong Chen
Summary: We designed and fabricated a novel subnanometer Ru-coating Pt/Al2O3 catalyst (named RuPt-ALD) via atomic layer deposition (ALD), which showed excellent capability of tuning catalysts' structure-property relationship for chlorobenzene (CB) oxidation. RuPt-ALD exhibited optimal activity and selectivity, with a stable CB conversion of similar to 98% for 600 minutes at 200°C in humid air, surpassing bare Ru or Pt samples. Experimental verification and theoretical calculation identified that the lower barriers of CB adsorption and O-2 dissociation on RuPt-ALD contributed to its stronger CB adsorption and appropriate oxygen activation capacity, which were the core factors for the excellent performance under humid feed.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Bayram Abay, Murat Rakap
Summary: The synthesis and characterization of poly (N-vinyl-2-pyrrolidone)-protected platinum (Pt/ PVP) nanoparticles and their application as highly effective catalysts in the hydrolysis of ethylenediamine bisborane (EDAB) to liberate hydrogen are reported. The nanoparticles exhibit stability for a long period of time without precipitation and possess the highest reported TOF value for the hydrolysis of EDAB. Their activation energy in the same reaction is relatively low.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Leigang Li, Pengtang Wang, Qi Shao, Xiaoqing Huang
Summary: This Progress Report summarizes recent research progress in advanced electrocatalysts for improved acidic OER performance. It discusses fundamental understanding about acidic OER including reaction mechanisms and atomic understanding for rational design of efficient electrocatalysts. It also provides an overview of the progress in the design and synthesis of advanced acidic OER electrocatalysts in terms of catalyst category.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Elif Seref, Melek Tercan, Hava Ozay, Pinar Ilgin, Ozgur Ozay
Summary: The biohybrid Na-Alg@Ru catalyst was prepared by stabilizing Ru(0) nanoparticles with biopolymer chains of sodium alginate. The in-situ prepared Ru(0) nanoparticles with an average particle size of 1.023 ± 0.097 nm were successfully used as a catalyst in hydrogen production from ammonia borane (AB) by hydrolysis reaction. The Na-Alg@Ru catalyst containing 3 mg Ru(0) metal showed 100% yield in the hydrolysis of 50 mM AB, with an estimated activation energy (Ea) of 61.05 kJ mol-1. Additionally, the Na-Alg@Ru nanoparticles were used in p(AAm)/NaAlg@Ru hydrogel films for hydrogen production in fuel cells, simulating a battery-like environment.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Shenghan Su, Laure Bourgeois, Nikhil V. Medhekar
Summary: The high strength of structural aluminium alloys is due to the controlled precipitation of specific intermetallic phases. In this study, we investigate the AlPt system and design a workflow to predict the thermodynamics of various phases and their precipitation sequence in binary alloying systems. Our findings suggest that Al2Pt will precipitate first and form bulk-like interfaces similar to Al2Au rather than Al2Cu.
Article
Chemistry, Multidisciplinary
MohammadNavid Haddadnezhad, Woocheol Park, Insub Jung, Hajir Hilal, Jeongwon Kim, Sungjae Yoo, Qiang Zhao, Soohyun Lee, Jaewon Lee, Sungwoo Lee, Sungho Park
Summary: In this research, we successfully synthesized morphologically complex nanoframes with a mixture of frames and thin solid planes, known as walled-nanoframes. By controlling the chemical steps, we created a variety of Pt nanoframes, including cuboctahedral nanoframes and single-walled nanoframes. The synthesis of double-walled nanoframes, where two Pt single-walled nanoframes are overlapped with a discernible gap, resulted in enhanced catalytic activity and high-surface area, carbon-free, and volume-compact nanocatalysts.
Article
Chemistry, Physical
Q. Gouty, F. J. Castro, G. Urretavizcaya, J. Sabatier, J. -l. Bobet
Summary: This study investigates the hydrolysis performance of Mg alloys scraps with the addition of different elements and compounds during ball milling. The results show that the hydrolysis curve can be divided into an incubation period and a logarithmic stage, and a new model is proposed to describe this process.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Yanmin Hu, Mengzhao Zhu, Xuan Luo, Geng Wu, Tingting Chao, Yunteng Qu, Fangyao Zhou, Rongbo Sun, Xiao Han, Hai Li, Bin Jiang, Yuen Wu, Xun Hong
Summary: Efficient and highly stable catalysts for the oxygen reduction reaction are essential for long-term operation of proton exchange membrane fuel cells. The coplanar Pt-carbon nanomeshes synthesized in this study exhibit excellent activity and stability in fuel cell tests, with peak power density of 1.21 W cm(-2) and current density of 0.360 A cm(-2) at 0.80 V in the H-2/O-2 cell. Density-functional theory analysis suggests that the increased vacancy formation energy of Pt atoms in coplanar Pt/C NMs helps restrain Pt dissolution and aggregation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)