Page 130 - 《精细化工》2022年第12期

·2496· 精细化工 FINE CHEMICALS 第 39 卷

由图 6 可以看出，催化剂循环使用 4 次，催化 [3] HUA B (华兵). Optimization of preparation conditions of Pd /C catalyst
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活性几乎不变，说明催化剂具有很高的稳定性，这
Energy Chemical Industry (能源化工), 2019, 40(2): 33-37.
主要得益于 SiO 2 纳米球的良好保护作用。为了进一 [4] DONG C Y, LI Y L, CHENG D Y, et al. Supported metal clusters:
步检验 Pd 亚纳米簇@SiO 2 催化芳香硝基化合物选 Fabrication and application in heterogeneous catalysis[J]. ACS
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列于表 2。可以看出，反应产率均高于 98%，证明
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Pd 亚纳米簇@SiO 2 可用于其他硝基物的加氢。 [6] HUDA M, MINAMISAWA K, TSUKAMOTO T, et al. Aerobic
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行加氢反应生成相应的芳胺化合物的底物拓展
particle size effects in the direct synthesis of H 2O 2: Is smaller
Table 2 Substrate expansion of the hydrogenation of aromatic better?[J]. Journal of Catalysis, 2017, 349: 30-40.
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对硝基甲苯 对甲苯胺 100.0
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对氟硝基苯 对氟苯胺 98.7 via reverse microemulsions: Classifications, preparations, and
对乙酰硝基苯 对乙酰苯胺 98.5 applications[J]. Nanoscale, 2014, 6(9): 4418-4437.
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注：反应条件为 0.1 mmol 底物，5 mg 催化剂，0.05 mmol
ultrasmall mesoporous silica nanoparticles: An efficient catalyst for
联苯，1 mL 乙醇，1 MPa H 2，50 ℃，4 h；反应产率由气相色谱
oxidative desulfurization[J]. RSC Advances, 2017, 7(71): 44827-44833.
内标法计算。 [11] WANG J S, LI X, ZHANG S F, et al. Facile synthesis of ultrasmall
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3 结论 [12] WANG J S, JIN H H, WANG W H, et al. Ultrasmall Ni-ZnO/SiO 2
synergistic catalyst for highly efficient hydrogenation of NaHCO 3 to
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采用反相微乳液法，在 CTAB/正丁醇/环己烷体
19581-19586.
系中制得 Pd 亚纳米簇，并原位包覆在 SiO 2 球壳中 [13] JIN H H, WANG J S, WANG W H, et al. Enhancing the activity,
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粒子的平均粒径为 0.7 nm，Pd 粒子均匀地分散在整 106013.
个 SiO 2 球壳中，且 Pd 质量分数为 4%。将制备的 [14] ALMANA N, PHIVILAY S P, LAVEILLE P, et al. Design of a
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基化合物的加氢反应中，在 50 ℃、1 MPa 的温和
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@SiO 2 对于硝基的加氢具有很好的应用前景。 Synthesis of supported Pd@CMP-1 catalyst and its catalytic
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