One catalyst for two uses: TiOx–C acts as either a photocatalyst or thermocatalyst to promote reductive amination,Reaction Chemistry & Engineering

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One catalyst for two uses: TiOx–C acts as either a photocatalyst or thermocatalyst to promote reductive amination
Reaction Chemistry & Engineering ( IF 3.4 ) Pub Date : 2021-10-24 , DOI: 10.1039/d1re00294e
Shun Wang ₁ , Xinli Tong ₁ , Lingwu Meng ₁ , Yujun Zhao ₂

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The selective reductive amination of carbonyl compounds is efficiently promoted using titanium oxide uniformly doped with carbon (TiO_x–C), either as a photocatalyst or thermocatalyst. For the reductive amination of 3-phenylpropanal, 82.7% conversion of 3-phenylpropanal and 99.0% selectivity of N,N-dimethyl-3-phenylpropan-1-amine was achieved using TiO_x–C as a photocatalyst at room temperature under visible light irradiation. In addition, 98.9% conversion with 99.0% product selectivity was attained at 90 °C under no light when TiO_x–C was employed as a thermocatalyst. Therein, the efficient separation of photogenerated electron and holes of TiO_x–C is the key factor during the photocatalytic process; while, the acidic sites of the surface and oxygen vacancies of TiO_x–C are responsible for its high efficiency in the thermocatalytic reductive amination reaction.

中文翻译：

一种催化剂有两种用途：TiOx-C 作为光催化剂或热催化剂促进还原胺化

使用均匀掺杂碳的氧化钛 (TiO _x -C) 作为光催化剂或热催化剂，可以有效地促进羰基化合物的选择性还原胺化。对于 3-苯基丙醛的还原胺化，使用 TiO _x -C 作为光催化剂在室温可见光下实现了82.7% 的 3-苯基丙醛转化率和 99.0% 的N , N-二甲基-3-苯基丙-1-胺的选择性辐照。此外，当 TiO _x -C 用作热催化剂时，在 90 °C 和无光照条件下实现了 98.9% 的转化率和 99.0% 的产物选择性。其中，TiO _x的光生电子和空穴的有效分离-C是光催化过程中的关键因素；同时，TiO _x -C表面的酸性位点和氧空位是其在热催化还原胺化反应中高效的原因。

更新日期：2021-11-16

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