Matching Relationship Between Carbon Material and Pd Precursor
- 73 Downloads
The matching relationship between carbon material and Pd precursor was investigated by constructing Pd@C catalysts with four carbon materials (mesoporous carbon, activated carbon, N-doped carbon and O-doped carbon) and three Pd precursors (PdCl2, Pd(C2H3O2)2 and Pd(NO3)2) and evaluating their catalytic performance in the phenol hydrogenation to cyclohexanone. The Pd precursor or the carbon material has no obvious influence on the cyclohexanone selectivity, but strongly affects the catalytic activity. The Pd@C prepared via PdCl2 shows good performance among all tested catalysts due to higher Pd content and better Pd dispersion. Conversely, although Pd(NO3)2 is easily adsorbed by carbon carriers, the catalytic activity is poor due to the worse Pd dispersion. The Pd(C2H3O2)2 adsorption is very sensitive to the surface properties of carbon, and the N-doping can enhance the binding force between carbon and Pd2+, leading to higher Pd content and better Pd dispersion, thereby enhanced catalytic activity. This work would provide valuable references for the selection of Pd precursor for a given support.
KeywordsCarbon Pd precursor Matching relationship Phenol hydrogenation Cyclohexanone
The financial supports from the National Key R&D Program (Grant No. 2016YFB0301503), the National Natural Science Foundation (Grant Nos. 21776127, 91534210) and the Jiangsu Province Natural Science Foundation for Distinguished Young Scholars (Grant No. BK20150044) of China are gratefully acknowledged.
Compliance with Ethical Standards
Conflict of interest
All authors declare no conflicts of interest.
- 31.Bachiller-Baeza B, Pena-Bahamonde J, Castillejos-Lopez E, Guerrero-Ruiz A, Rodriguez-Ramos I (2015) Improved performance of carbon nanofiber-supported palladium particles in the selective 1,3-butadiene hydrogenation: influence of carbon nanostructure, support functionalization treatment and metal precursor. Catal Today 249:63–81CrossRefGoogle Scholar
- 36.Lyalina NN, Dargina SV, Sobolev AN, Buslaeva TM, Romm IP (1993) Structure and properties of palladium(II) diacetate and its complexes. Koordinats Khim 19:57–63Google Scholar
- 42.Long X, Zhao ZM, Wu L, Luo S, Wen H, Wu W, Zhang HB, Ma JT (2017) Distinctive ligand effects of functionalized magnetic microparticles immobilizing palladium acetate as heterogeneous coordination catalysts for selective oxidation of styrene to acetophenone. Mol Catal 433:291–300CrossRefGoogle Scholar