Preparation,characterization,and performance of sandwich-like structure catalyst Ce-MOF@Pt@TpPa-COF
CONG Peiao
WANG Rongyao
LI Chunsheng
CHEN Guozhu
Abstract：Objective To improve the conversion rate and selectivity of phenylpropionaldehyde(HCAL)in cinnamaldehyde(CAL)hydrogenation,and to verify the effectiveness of covalent organic framework(COF)as a shell to improve the performance of heterogeneous catalytic hydrogenation,a selective catalytic hydrogenation catalyst with a sandwich-like structure is prepared.
Methods A metal-organic framework(MOF),Ce-UiO-66-NH2(Ce-MOF),was synthesized as a core via solvothermal method.Using the colloidal impregnation method,platinum(Pt)metal nanoparticles(NPs)were uniformly loaded on the surface of the Ce-MOF core to obtain Ce-MOF@Pt.2,4,6-trihydroxy-1,3,5-benzenetricarbaldehyde(Tp)and p-phenylenediamine(Pa)were added via solvothermal method to construct a covalent organic framework(COF)shell,TpPa-COF.The shell was then covalently bonded to the Ce-MOF through a C-N bond to prepare the composite catalyst Ce-MOF@Pt@TpPa-COF with Ce-MOF as the core,Pt NPs as the intermediate layer,and TpPa-COF as the shell.Thecatalyst TpPa-COF@Pt was also prepared,and the the structures and performance of Ce-MOF@Pt,Ce-MOF@Pt@TpPa-COF,and TpPa-COF@Pt were compared regard-ing to the conversion rate,selectivity,and stability of the three catalyst groups during the hydrogenation of CAL to HCAL.
Results and Discussion At a reaction time of 6 h,the conversion rates of CAL for Ce-MOF@Pt,Ce-MOF@Pt@TpPa-COF,and TpPa-COF@Pt were 92％,89％,and 99％,respectively.The selectivities for the target product HCAL were 21％,50％,and 1％,respectively.The yields of the target product HCAL were 19％,45％,and 1％,respectively.Compared to Ce-MOF@Pt and TpPa-COF@Pt,Ce-MOF@Pt@TpPa-COF effectively maintained activity and stability at high temperatures and exhib-ited stronger resistance to deactivation.
Conclusion In the catalytic hydrogenation of CAL,Ce-MOF@Pt@TpPa-COF significantly improves the selectivity and yield of HCAL in heterogeneous catalytic hydrogenation reactions while maintaining better cyclic stability.The study provides insights into the research and applications of sandwich-like structure catalysts with TpPa-COF as the shell in heterogeneous catalysis.
Keywords：sandwich-like structuremetal-organic frameworkcovalent organic frameworkcinnamaldehydeselective hydrogenation
Publication Date：2025-05-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：12( 101-112 )