PtCo/MWCNTs Prepared by a Microwave‐assisted Polyol Method for Selective Cinnamaldehyde Hydrogenation
PtCo/MWCNTs Prepared by a Microwave‐assisted Polyol Method for Selective Cinnamaldehyde Hydrogenation
复制标题
微波辅助多元醇法选择性肉桂醛加氢制备 PtCo/MWCNTs
DOI：
10.1002/cnma.202300294
复制
发表时间：
2023
期刊：
影响因子：
3.8
通讯作者：
Liang, Xinhua
中科院分区：
文献类型：
--
作者：
Wang, Kaiying;Liu, Yuzi;Wang, Jee‐Ching;Liang, Xinhua
使用微波辐射，PtCo合金纳米颗粒在几分钟内沉积在COOH官能化的MWCNT载体上。将所得催化剂用于肉桂醛的选择性加氢反应，肉桂醛的产物广泛应用于各个领域。在肉桂醛选择性氢化为肉桂醇的反应中，微波制备的催化剂（一般为PtxCoy-MW）优于传统方法制备的催化剂（Pt1Co2-con）。使用Pt1Co2-MW获得了最高的肉桂醇氢化选择性，为89%，而Pt1Co2-con显示出76%的选择性。表征结果证实，微波制备的样品比Pt1Co2-con样品中的Pt和Co之间具有更强的相互作用。合金化的Co改变了Pt的电子结构，导致C = O键被其氧原子的孤对电子有利地吸附。此外，Pt1Co2-MW样品显示出催化性能的可忽略的变化（例如，肉桂醛转化和选择性氢化为肉桂醇）。
Using microwave irradiation, PtCo alloy nanoparticles were deposited within a few minutes on COOH‐functionalized MWCNT supports. The obtained catalysts were used for selective hydrogenation of cinnamaldehyde, a reaction whose products are widely used in various fields. In the selective cinnamaldehyde hydrogenation to cinnamyl alcohol, microwave‐prepared catalysts (generically, PtxCoy‐MW) outperformed a catalyst prepared by the conventional method (Pt1Co2‐con). The highest selective hydrogenation to cinnamyl alcohol, 89%, was obtained using Pt1Co2‐MW, while Pt1Co2‐con showed a selectivity of 76%. Characterization results confirmed that the microwave prepared samples had a stronger interaction between Pt and Co than that in the Pt1Co2‐con sample. The alloyed Co altered the electronic structure of Pt, leading to favorable adsorption of the C=O bond by the lone‐pair electrons of its oxygen atom. Moreover, the Pt1Co2‐MW sample showed neglectable change in catalytic performance (e. g., cinnamaldehyde conversion and selective hydrogenation to cinnamyl alcohol) during recycling experiments.