The Experts below are selected from a list of 19407 Experts worldwide ranked by ideXlab platform
Allen J Bard - One of the best experts on this subject based on the ideXlab platform.
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surface interrogation scanning electrochemical microscopy of ni1 xfexooh 0 x 0 27 oxygen evolving catalyst kinetics of the fast Iron sites
Journal of the American Chemical Society, 2016Co-Authors: Allen J BardAbstract:Nickel-Iron mixed metal oxyhydroxides have attracted significant attention as an oxygen evolution reaction (OER) catalyst for solar fuel renewable energy applications. Here, we performed surface-selective and time-dependent redox titrations to directly measure the surface OER kinetics of NiIV and FeIV in NiOOH, FeOOH, and Ni1–xFexOOH (0 < x < 0.27) electrodes. Most importantly, two types of surface sites exhibiting “fast” and “slow” kinetics were found, where the fraction of “fast” sites in Ni1–xFexOOH matched the Iron Atom content in the film. This finding provides experimental support to the theory-proposed model of active sites in Ni1–xFexOOH. The OER rate constant of the “fast” site was 1.70 s–1 per Atom.
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Surface Interrogation Scanning Electrochemical Microscopy of Ni1–xFexOOH (0 < x < 0.27) Oxygen Evolving Catalyst: Kinetics of the “fast” Iron Sites
Journal of the American Chemical Society, 2015Co-Authors: Allen J BardAbstract:Nickel-Iron mixed metal oxyhydroxides have attracted significant attention as an oxygen evolution reaction (OER) catalyst for solar fuel renewable energy applications. Here, we performed surface-selective and time-dependent redox titrations to directly measure the surface OER kinetics of NiIV and FeIV in NiOOH, FeOOH, and Ni1–xFexOOH (0 < x < 0.27) electrodes. Most importantly, two types of surface sites exhibiting “fast” and “slow” kinetics were found, where the fraction of “fast” sites in Ni1–xFexOOH matched the Iron Atom content in the film. This finding provides experimental support to the theory-proposed model of active sites in Ni1–xFexOOH. The OER rate constant of the “fast” site was 1.70 s–1 per Atom.
Jianlin Shi - One of the best experts on this subject based on the ideXlab platform.
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construction of single Iron Atom nanocatalysts for highly efficient catalytic antibiotics
Small, 2019Co-Authors: Minfeng Huo, Liying Wang, Haixian Zhang, Linlin Zhang, Yu Chen, Jianlin ShiAbstract:Bacterial infection caused by pathogenic bacteria has long been an intractable issue that threatens human health. Herein, the fact that nanocatalysts with single Iron Atoms anchored in nitrogen-doped amorphous carbon (SAF NCs) can effectively induce peroxidase-like activities in the presence of H2 O2 , generating abundant hydroxyl radicals for highly effective bacterial elimination (e.g., Escherichia coli and Staphylococcus aureus), is reported. In combination with the intrinsic photothermal performance of the nanocatalysts, noticeable bacterial-killing effects are extensively investigated. Especially, the antibacterial mechanism of critical cell membrane destruction induced by SAF NCs is unveiled. Based on the bactericidal properties of SAF NCs, in vivo bacterial infections propagated at wounds by E. coli and S. aureus pathogens can be effectively eradicated, resulting in better wound healing. Collectively, the present study highlights the highly efficient in vitro antibacterial and in vivo anti-infection performances by the single-Iron-Atom-containing nanocatalysts.
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Construction of Single‐Iron‐Atom Nanocatalysts for Highly Efficient Catalytic Antibiotics
Small (Weinheim an der Bergstrasse Germany), 2019Co-Authors: Minfeng Huo, Liying Wang, Haixian Zhang, Linlin Zhang, Yu Chen, Jianlin ShiAbstract:Bacterial infection caused by pathogenic bacteria has long been an intractable issue that threatens human health. Herein, the fact that nanocatalysts with single Iron Atoms anchored in nitrogen-doped amorphous carbon (SAF NCs) can effectively induce peroxidase-like activities in the presence of H2 O2 , generating abundant hydroxyl radicals for highly effective bacterial elimination (e.g., Escherichia coli and Staphylococcus aureus), is reported. In combination with the intrinsic photothermal performance of the nanocatalysts, noticeable bacterial-killing effects are extensively investigated. Especially, the antibacterial mechanism of critical cell membrane destruction induced by SAF NCs is unveiled. Based on the bactericidal properties of SAF NCs, in vivo bacterial infections propagated at wounds by E. coli and S. aureus pathogens can be effectively eradicated, resulting in better wound healing. Collectively, the present study highlights the highly efficient in vitro antibacterial and in vivo anti-infection performances by the single-Iron-Atom-containing nanocatalysts.
Liying Wang - One of the best experts on this subject based on the ideXlab platform.
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construction of single Iron Atom nanocatalysts for highly efficient catalytic antibiotics
Small, 2019Co-Authors: Minfeng Huo, Liying Wang, Haixian Zhang, Linlin Zhang, Yu Chen, Jianlin ShiAbstract:Bacterial infection caused by pathogenic bacteria has long been an intractable issue that threatens human health. Herein, the fact that nanocatalysts with single Iron Atoms anchored in nitrogen-doped amorphous carbon (SAF NCs) can effectively induce peroxidase-like activities in the presence of H2 O2 , generating abundant hydroxyl radicals for highly effective bacterial elimination (e.g., Escherichia coli and Staphylococcus aureus), is reported. In combination with the intrinsic photothermal performance of the nanocatalysts, noticeable bacterial-killing effects are extensively investigated. Especially, the antibacterial mechanism of critical cell membrane destruction induced by SAF NCs is unveiled. Based on the bactericidal properties of SAF NCs, in vivo bacterial infections propagated at wounds by E. coli and S. aureus pathogens can be effectively eradicated, resulting in better wound healing. Collectively, the present study highlights the highly efficient in vitro antibacterial and in vivo anti-infection performances by the single-Iron-Atom-containing nanocatalysts.
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Construction of Single‐Iron‐Atom Nanocatalysts for Highly Efficient Catalytic Antibiotics
Small (Weinheim an der Bergstrasse Germany), 2019Co-Authors: Minfeng Huo, Liying Wang, Haixian Zhang, Linlin Zhang, Yu Chen, Jianlin ShiAbstract:Bacterial infection caused by pathogenic bacteria has long been an intractable issue that threatens human health. Herein, the fact that nanocatalysts with single Iron Atoms anchored in nitrogen-doped amorphous carbon (SAF NCs) can effectively induce peroxidase-like activities in the presence of H2 O2 , generating abundant hydroxyl radicals for highly effective bacterial elimination (e.g., Escherichia coli and Staphylococcus aureus), is reported. In combination with the intrinsic photothermal performance of the nanocatalysts, noticeable bacterial-killing effects are extensively investigated. Especially, the antibacterial mechanism of critical cell membrane destruction induced by SAF NCs is unveiled. Based on the bactericidal properties of SAF NCs, in vivo bacterial infections propagated at wounds by E. coli and S. aureus pathogens can be effectively eradicated, resulting in better wound healing. Collectively, the present study highlights the highly efficient in vitro antibacterial and in vivo anti-infection performances by the single-Iron-Atom-containing nanocatalysts.
Khalil Amine - One of the best experts on this subject based on the ideXlab platform.
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nitrogen coordinated single Iron Atom catalysts derived from metal organic frameworks for oxygen reduction reaction
Nano Energy, 2019Co-Authors: Fei Xiao, Chengjun Sun, Wen Wen, Qi Wang, Shangqian Zhu, Zidong Wei, Xiaoqing Pan, Jiangan Wang, Khalil AmineAbstract:Abstract Iron and nitrogen co-doped carbon (Fe-N-C) catalysts hold great promise to replace platinum group metal used for the oxygen reduction reaction (ORR) in low-temperature fuel cells. However, general synthesis routes require tedious acid washing and extensive heat treatment, usually resulting in uncontrollable morphologies and undesirable compounds. In this work, a zeolitic imidazolate framework (ZIF-8) was employed as a self-template for one-pot synthesis of a Fe-N-C catalyst consisting of uniformly dispersed Fe single Atoms. Atomically dispersed Fe Atoms were well distributed along the edges of the porous carbon matrix. Each of the Fe Atoms was coordinated with four N Atoms in the plane and two O Atoms in the axial direction. The optimized Fe-N-C catalyst showed excellent ORR activities with half-wave potentials of 0.81 and 0.90 V in acidic and alkaline solutions, respectively. The results may be important for the optimization of single-Atom-based catalysts for various reactions.
David J. Evans - One of the best experts on this subject based on the ideXlab platform.
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An extremely large 57Fe Mössbauer quadrupole splitting for a distorted tetrahedral high-spin Iron(II) complex
Chemical Physics Letters, 1996Co-Authors: David J. EvansAbstract:Abstract The zero-field, solid state, 57Fe Mossbauer spectrum of the trinuclear high-spin Iron(II) complex [Fe3(SC6H2iPr3−2,4,6)4∗N(SiMe3)2∗2] has been recorded at 77 K. ‘Unusually’ large quadrupole splitting values (≥3.5 mm s−1) are observed for both the distorted trigonal planar (3.60 mm s−1) and distorted tetrahedral Iron Atoms (4.55 mm s−1) of the complex. The quadrupole splitting of the distorted tetrahedral Iron Atom is extremely large and equals that previously reported as the largest. ‘Unusually’ large quadrupole splittings for high-spin Iron(II) are not that unusual and, in fact, are found for several coordination numbers and geometries.
