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Lanthanide oxide supported Ni nanoparticles for the selective hydrogenation of cinnamaldehyde
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2023-01-20 , DOI: 10.1039/d2cy01868c Huiyue Xin 1 , Mengnan Li 1 , Li Chen 1 , Chen Zhao 1, 2 , Peng Wu 1, 2 , Xiaohong Li 1, 2
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2023-01-20 , DOI: 10.1039/d2cy01868c Huiyue Xin 1 , Mengnan Li 1 , Li Chen 1 , Chen Zhao 1, 2 , Peng Wu 1, 2 , Xiaohong Li 1, 2
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NiO–LnOx (Ln = La, Ce or Pr) precursors were prepared using a sol–gel method with glucose as a template, and the corresponding Ni/LnOx catalysts were obtained by reduction in hydrogen at 500 °C. When applied to the selective hydrogenation of cinnamaldehyde (CAL), the Ni/La2O3 catalyst exhibited superior behavior to Ni/Pr6O11 and Ni/CeO2, affording 90.2% selectivity to hydrocinnamaldehyde (HCAL) with an initial activity of 0.57 s−1 under mild conditions. Various characterization techniques confirmed that the formation of the perovskite LaNiO3 precursor enhanced the interaction of Ni species with lanthanum species, and effectively avoided the agglomeration of Ni nanoparticles during the reduction. Hence, Ni nanoparticles could achieve high and uniform dispersion. Moreover, the C![[double bond, length as m-dash]](https://www.rsc.org/images/entities/char_e001.gif)
O group in CAL was preferentially adsorbed and fixed by weak and medium-strong basic sites (La3+–O2−) on the Ni/La2O3 catalyst, so that the chemisorption of the CC bond on active Ni nanoparticles becomes more favorable and thus the corresponding selective hydrogenation of the CC bond dominates.
中文翻译：
镧系元素负载的 Ni 纳米粒子用于肉桂醛的选择性加氢
以葡萄糖为模板，采用溶胶-凝胶法制备NiO-LnO x (Ln = La, Ce or Pr)前驱体，并在500 °C氢气中还原得到相应的Ni/LnO x催化剂。当应用于肉桂醛 (CAL) 的选择性加氢时，Ni/La 2 O 3催化剂表现出优于 Ni/Pr 6 O 11和 Ni/CeO 2的性能，对氢化肉桂醛 (HCAL) 的选择性为 90.2%，初始活性为0.57 s -1在温和条件下。各种表征技术证实钙钛矿 LaNiO 3的形成前驱体增强了Ni物种与镧物种的相互作用，有效避免了还原过程中Ni纳米颗粒的团聚。因此，镍纳米粒子可以实现高度均匀的分散。此外，CAL中的C O基团优先吸附固定在Ni/La 2 O 3 催化剂上的弱碱性和中强碱性位点（La 3+ –O 2− ） ，使得C C键化学吸附在Ni/La 2 O 3催化剂上活性 Ni 纳米粒子变得更有利，因此 C C 键的相应选择性氢化占主导地位。
更新日期：2023-01-20
O group in CAL was preferentially adsorbed and fixed by weak and medium-strong basic sites (La3+–O2−) on the Ni/La2O3 catalyst, so that the chemisorption of the CC bond on active Ni nanoparticles becomes more favorable and thus the corresponding selective hydrogenation of the CC bond dominates.
中文翻译：
镧系元素负载的 Ni 纳米粒子用于肉桂醛的选择性加氢
以葡萄糖为模板，采用溶胶-凝胶法制备NiO-LnO x (Ln = La, Ce or Pr)前驱体，并在500 °C氢气中还原得到相应的Ni/LnO x催化剂。当应用于肉桂醛 (CAL) 的选择性加氢时，Ni/La 2 O 3催化剂表现出优于 Ni/Pr 6 O 11和 Ni/CeO 2的性能，对氢化肉桂醛 (HCAL) 的选择性为 90.2%，初始活性为0.57 s -1在温和条件下。各种表征技术证实钙钛矿 LaNiO 3的形成前驱体增强了Ni物种与镧物种的相互作用，有效避免了还原过程中Ni纳米颗粒的团聚。因此，镍纳米粒子可以实现高度均匀的分散。此外，
CAL中的C O基团优先吸附固定在Ni/La 2 O 3 催化剂上的弱碱性和中强碱性位点（La 3+ –O 2− ） ，使得C C键化学吸附在Ni/La 2 O 3催化剂上活性 Ni 纳米粒子变得更有利，因此 C C 键的相应选择性氢化占主导地位。
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