Chemo-enzymatic cascade processes are invaluable due to their ability to rapidly construct high-value products from available feedstock chemicals in a one-pot relay manner. In an article, author is Wu, Fan, once mentioned the application of 16606-55-6, Name is (R)-4-Methyl-1,3-dioxolan-2-one, molecular formula is C4H6O3, molecular weight is 102.09, MDL number is MFCD00798265, category is copper-catalyst. Now introduce a scientific discovery about this category, SDS of cas: 16606-55-6.
Highly dispersed boron-nitride/CuOx-supported Au nanoparticles for catalytic CO oxidation at low temperatures
Supported-Au catalysts show excellent activity in CO oxidation, where the nature of the support has a significant impact on catalytic activity. In this work, a hexagonal boron nitride (BN) support with a high surface area and adequately exposed edges was obtained by the ball-milling technique. Thereafter, impregnation of the BN support with Cu(NO3)(2) followed by calcination under air at 400 degrees C yielded a CuO-modified support. After Au loading, the obtained Au-CuOx/BN catalyst exhibited high CO oxidation activity at low temperatures with a 50% CO conversion temperature (T-50%) of 25 degrees C and a complete CO conversion temperature (T-100%) of 80 degrees C, well within the operational temperature range of proton exchange membrane fuel cells. However, the CO oxidation activity of Au/BN, prepared without CuOx for comparison, was found to be relatively low. Our study reveals that BN alone disperses both Cu and Au nanoparticles well. However, Au nanoparticles on the surface of BN in the absence of CuO species tend to aggregate upon CO oxidation reactions. Conversely, Au nanoparticles supported on the surface of CuO-modified BN remain small with an average size of similar to 2.0 nm before and after CO oxidation. Moreover, electron transfer between Au and Cu species possibly favors the stabilization of highly dispersed Au nanoparticles on the BN surface and also enhances CO adsorption. Thus, our results demonstrate that thermally stable and conductive CuO-modified BN is an excellent support for the preparation of highly dispersed and stable Au catalysts. (C) 2021, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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Reference:
Copper catalysis in organic synthesis – NCBI,
,Special Issue “Fundamentals and Applications of Copper-Based Catalysts”