Pd Nanoparticles Supported on Triangle‐Shaped La<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> Nanosheets: A New Highly Efficient and Durable Catalyst for Selective Hydrogenation of Cinnamaldehyde to Hydrocinnamaldehyde
Fei Wang, Yanshuai Bi, Kai Hu, Xuejiao Wei
Abstract
Abstract A catalyst in which Pd nanoparticles are supported on triangle‐shaped La 2 O 2 CO 3 nanosheets exposing predominantly the (001) planes (Pd/La 2 O 2 CO 3 ‐TNS; where TNS denotes triangular nanosheets) was prepared by a facile solvothermal method. The Pd/La 2 O 2 CO 3 ‐TNS catalysts exhibited excellent catalytic activity and recycling stability for hydrogenation of cinnamaldehyde to hydrocinnamaldehyde with turnover frequency of up to 41 238 h −1 . This enhanced activity of Pd/La 2 O 2 CO 3 ‐TNS results from strong metal–support interactions. Structure analysis and characterization demonstrated that surface‐oxygen‐enriched La 2 O 2 CO 3 ‐TNS supports exposing (001) planes are beneficial to charge transfer between the Pd nanoparticles and triangle‐shaped La 2 O 2 CO 3 nanosheets and increase the electron density of Pd. Moreover, the modulated electronic states of the Pd/La 2 O 2 CO 3 ‐TNS catalysts can enhance the adsorption and activation of hydrogen to enhance the hydrogenation activity.