The synergistic role of the support surface and Au–Cu alloys in a plasmonic Au–Cu@LDH photocatalyst for the oxidative esterification of benzyl alcohol with methanol

2020 ◽  
Vol 22 (3) ◽  
pp. 1655-1664 ◽  
Author(s):  
Xiaoyu Wang ◽  
Ruiyi Wang ◽  
Jie Wang ◽  
Chaoyang Fan ◽  
Zhanfeng Zheng
Keyword(s):  
Benzyl Alcohol ◽  
Support Surface ◽  
Acid Base ◽  
Base Pairs ◽  
Oxidative Esterification ◽  
Cu Alloy ◽  
Cu Alloys

The acid–base pairs of the support synergistic with Au–Cu alloy NPs could drive the oxidative esterification of benzyl alcohol with methanol.

Non-noble metal catalysts for transfer hydrogenation of levulinic acid: The role of surface morphology and acid-base pairs

2020 ◽  
Vol 18 ◽  
pp. 100501
Author(s):  
Jinyao Wang ◽  
Jiefeng Liu ◽  
Xiao Yu ◽  
Wenxiang Zhang ◽  
Guangyu Zhang ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Noble Metal ◽  
Levulinic Acid ◽  
Metal Catalysts ◽  
Transfer Hydrogenation ◽  
Acid Base ◽  
Base Pairs ◽  
Noble Metal Catalysts

Chemicals from biomass: Synthesis of glycerol carbonate by transesterification and carbonylation with urea with hydrotalcite catalysts. The role of acid–base pairs

2010 ◽  
Vol 269 (1) ◽  
pp. 140-149 ◽  
Author(s):  
Maria J. Climent ◽  
Avelino Corma ◽  
Pilar De Frutos ◽  
Sara Iborra ◽  
Maria Noy ◽  
...  
Keyword(s):  
Glycerol Carbonate ◽  
Acid Base ◽  
Base Pairs

Plastic deformation of θ ' in Al-4%Cu alloy

1978 ◽  
Vol 36 (1) ◽  
pp. 576-577
Author(s):  
Shrikant P. Bhat
Keyword(s):  
Deformation Behavior ◽  
Room Temperature ◽  
Electron Microscopic Observation ◽  
Bulk Alloy ◽  
Electron Microscopic ◽  
Cu Alloy ◽  
Cu Alloys ◽  
Orowan Mechanism ◽  
The Subject ◽  
Cyclic Straining

deformation behavior of Al-Cu alloys aged to contain θ ' has been the subject of many investigations (e.g., Ref. 1-5). Since θ ' is strong and hard, dislocations bypass θ ' plates (Orowan mechanism) at low strains. However, at high strains the partially coherent θ ' plates are probably sheared, although the mechanism is complex, depending on the form of deformation. Particularly, the cyclic straining of the bulk alloy is known to produce gross bends and twists of θ '. However, no detailed investigation of the deformation of θ ' has yet been reported; moreover, Calabrese and Laird interpreted the deformation of θ ' as largely being elastic.During an investigation of high temperature cyclic deformation, the detailed electron-microscopic observation revealed that, under reversed straining conditions, θ ' particles are severely distorted--bent and twisted depending on the local matrix constraint. A typical electronmicrograph, showing the twist is shown in Fig. 1. In order to establish whether the deformation is elastic or plastic, a sample from a specimen cycled at room temperature was heated inside the microscope and the results are presented in a series of micrographs (Fig. 2a-e).

Ethanol conversion over Ga2O3-ZrO2 solid solution: empirical evidences of the reaction pathway, the surface acid–base property, and role of isolated gallium ion

2021 ◽  
Author(s):  
Takashi Yamamoto ◽  
Akihito Kurimoto ◽  
Riona Sato ◽  
Shoki Katada ◽  
Hirotaka Mine ◽  
...  
Keyword(s):  
Solid Solution ◽  
Reaction Pathway ◽  
Ethanol Conversion ◽  
Acid Base ◽  
Base Property ◽  
Temperature Range ◽  
Acid Base Property

Ethanol conversion by Ga2O3-ZrO2 solid solution was examined in the temperature range 573–773 K, and acetone/isobutene formation was confirmed under cofeeding of H2O vapor. The reaction pathway was empirically investigated...

scholarly journals Adaptation, Ecology, and Evolution of the Halophilic Stromatolite ArchaeonHalococcus hamelinensisInferred through Genome Analyses

Archaea ◽  
2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Reema K. Gudhka ◽  
Brett A. Neilan ◽  
Brendan P. Burns
Keyword(s):  
Unknown Function ◽  
Energy Production ◽  
Extreme Environment ◽  
Evolutionary Significance ◽  
Base Pairs ◽  
Protein Coding ◽  
Inorganic Ion ◽  
Damage Repair ◽  
Genome Analyses

Halococcus hamelinensiswas the first archaeon isolated from stromatolites. These geomicrobial ecosystems are thought to be some of the earliest known on Earth, yet, despite their evolutionary significance, the role of Archaea in these systems is still not well understood. Detailed here is the genome sequencing and analysis of an archaeon isolated from stromatolites. The genome ofH. hamelinensisconsisted of 3,133,046 base pairs with an average G+C content of 60.08% and contained 3,150 predicted coding sequences or ORFs, 2,196 (68.67%) of which were protein-coding genes with functional assignments and 954 (29.83%) of which were of unknown function. Codon usage of theH. hamelinensisgenome was consistent with a highly acidic proteome, a major adaptive mechanism towards high salinity. Amino acid transport and metabolism, inorganic ion transport and metabolism, energy production and conversion, ribosomal structure, and unknown function COG genes were overrepresented. The genome ofH. hamelinensisalso revealed characteristics reflecting its survival in its extreme environment, including putative genes/pathways involved in osmoprotection, oxidative stress response, and UV damage repair. Finally, genome analyses indicated the presence of putative transposases as well as positive matches of genes ofH. hamelinensisagainst various genomes of Bacteria, Archaea, and viruses, suggesting the potential for horizontal gene transfer.

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