By Mei Yan
In this thesis, the point of interest is at the learn of latest catalytic homes of unsupported nanoporous metals in heterogeneous natural reactions less than liquid-phase stipulations. the writer was once the 1st to manufacture nanoporous copper with tunable nanoporosity and observe it for natural reactions. The catalyst will be reused as much as ten occasions with out lack of catalytic job. moreover, the writer built the hugely selective semihydrogenation of alkynes utilizing nanoporous gold as a catalyst for the 1st time, affording Z-alkenes in a hundred% selectivity, which can't be discovered by means of conventional catalysts. the entire effects defined right here may also help readers to boost new catalytic functionality of nanoporous metals for natural reactions.
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Extra resources for Development of New Catalytic Performance of Nanoporous Metals for Organic Reactions
EDX analysis showed that the residual Mn composition of the 0 °C dealloyed sample (cat-4) is &4 at. 2 Results and Discussion 21 Fig. 7 (cat-10) Fig. 01 M MnSO4; B: HCl solution b 1 H NMR yield determined using CH2Br2 as an internal standard c Isolated yield remains approximately constant at &2 at. % for cat-5 to cat-7 (Fig. 4). Dealloying of the 200 lm thickness Cu30Mn70 alloy in HCl solution resulted in large ligaments with an average diameter of 60–70 nm (Fig. 3a, b, cat-8 and cat-9); in the reduced concentration, a non-nanopore structure was observed (Fig.
1314. 0793. 0845. 1158. 0900. 1266. 0885. 1764. 2233. 1451. 4 Experimental Section 49 50 2 Nanoporous Copper Metal Catalyst in Click Chemistry References 51 References 1. Zielasek V, Jürgens B, Schulz C et al (2006) Gold catalysts: nanoporous gold foams. Angew Chem Int Ed 45:8241–8244 2. Xu C, Su J, Xu X et al (2007) Low temperature CO oxidation over unsupported nanoporous gold. J Am Chem Soc 129:42–43 3. Xu C, Xu X, Su J et al (2007) Research on unsupported nanoporous gold catalyst for CO oxidation.
10 Formation of Nanostructured Copper Acetylide (Figs. 5 h, the cat-1 surface was turned to yellow (Fig. 11). The SEM image showed that the surface was covered with a uniform grass-like material. When the grass-like material was treated with an excess amount of benzyl azide 2a, the grass-like material was disappeared from SEM image. The nanoporous structure of cat-1 surface was recovered and a small amount of 3a was observed from 1H NMR and GC-MS. The grass-like material should be the nanostructured copper acetylide.