期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 322, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2022.122128
关键词
Catalytic transfer hydrogenolysis; Palladium nanocubes; Nanosheets; C-O bond cleavage; Lignin
A top-down synthesis method was used to fabricate a bifunctional metallic catalyst with specific lattice planes. The catalyst exhibited excellent catalytic activity, recycling durability, and size selectivity towards lignin substrates.
A rational design of the intrinsic lattice structure of catalysts is vitally important to address catalytic perfor-mance. Herein is reported a top-down synthesis for the fabrication of a bifunctional metallic catalyst. First, palladium nanocubes with (100) lattices planes were synthesized through a shape-control strategy; next, the as -synthesized Pd/Co-ZIF was used as a template for in -situ phase reconstruction by a spontaneous phase trans-formation process in the presence of H4SiW under solvothermal conditions. Ultimately, formation of 3D hier-archical flower-like bimetallic nitride nanosheets (SiW12 @Pd/Co-ZIF-NS) were generated because of this process. The SiW12 @Pd/Co-ZIF-NS catalyst not only displays excellent catalytic transfer hydrogenolysis for C-O bond cleavage of lignin dimeric substrates, but also maintains superior recycling durability due to an encapsu-lation phenomenon preventing aggregation. Finally, the resulting nanocomposites exhibit superior activity and good size selectivity toward catalytic transfer hydrogenolysis of the actual lignin substrates to produce a sig-nificant amount of low-molecular-weight aromatic compounds.
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