MoC demonstrates excellent performance in catalysis, and it has been found to possess excellent hydrogen evolution reaction (HER) catalytic activity and highly efficient nitrogen fixation. The catalytic activity of MoC is greatly influenced and restricted by the preparation method. Sintering and carbon deposition, which affect the catalytic activity of MoC, are inevitable in the traditional vapor-solid-solid (VSS) process. In this study, we report the controllable synthesis of α-MoC micron flowers by adjusting the growth temperature a vapor-liquid-solid (VLS) process. The density of the MoC micron flowers is closely related to the concentration of NaMoO aqueous solution. The as-grown MoC micron flowers dispersed with Pt are validated to be an enhanced collaborative electrocatalyst for HER against Pt/VSS-MoC.
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http://dx.doi.org/10.1039/d3ra04813f | DOI Listing |
Micron
December 2024
Department of Botany and Plant Physiology, University of Life Sciences in Lublin, Akademicka 15, Lublin 20-950, Poland. Electronic address:
The small flowers of Myosotis scorpioides are pollinated by various groups of insects feeding on their nectar accumulating at the base of the corolla tube. To date, only few studies have focused on the anatomy and ultrastructure of nectaries in plants from the family Boraginaceae. The aim of this study was to analyse the structure of the M.
View Article and Find Full Text PDFSoft Matter
September 2024
Department of Polymer Science and Engineering, University of Massachusetts, 120 Governors Drive, Amherst, MA 01003, USA.
We employ the phospholipid bilayer membranes of giant unilamellar vesicles as a free-standing environment for the growth of membrane-integrated ultrathin phospholipid crystals possessing a variety of shapes with 6-fold symmetry. Crystal growth within vesicle membranes, where more elaborate shapes grow on larger vesicles is dominated by the bending energy of the membrane itself, creating a means to manipulate crystal morphology. Here we demonstrate how cooling rate preconditions the membrane tension before nucleation, in turn regulating nucleation and growth, and directing the morphology of crystals by the time they are large enough to be visualized.
View Article and Find Full Text PDFAnal Chem
June 2024
College of Chemistry, Tianjin Key Laboratory of Biosensing and Molecular Recognition, Nankai University, Tianjin 300071, China.
In this work, a micron-sized flower-like metal-organic frameworks (MOFs)-based boronate-affinity sandwich-type immunoassay was fabricated for the dual-mode glycoprotein assay. For proof of concept, the flower-like MOFs were synthesized from transition Cu nodes and tetrakis (4-carboxyphenyl) porphyrin (TCPP) ligands by spontaneous standing assembly. In addition, the specificity toward glycoprotein involved the antigen recognition as well as covalent bonding via the boronate-glycan affinity, and the immediate signal responses were initiated by textural decomposition of the flower-like MOFs.
View Article and Find Full Text PDFMicron
August 2024
Balıkesir University, Balıkesir, Türkiye.
Pollen morphology and nutlet structures of some Prunella L. taxa were examined in detail by light microscopy (LM) and scanning electron (SEM) microscopy. Pollen grains of Prunella vary in size from small to large (Polar axis (P) = 22.
View Article and Find Full Text PDFPhysiol Plant
April 2024
Department of Wood Mechanics and Technology, Faculty of Forestry, Istanbul University-Cerrahpaşa, Istanbul, Turkey.
A number of natural fibers are being proposed for use in composite materials, especially those extracted from local plants, especially those able to grow spontaneously as they are cost-efficient and have unexplored potential. Sansevieria cylindrica, within the Asparagaceae (previously Agavacae) family, has recently been considered for application in polymer and rubber matrix composites. However, its characterization and even the sorting out of technical fiber from the stem remains scarce, with little available data, as is often the case when the fabrication of textiles is not involved.
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