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Mg‐Al Mixed Oxides Supported Bimetallic Au‐Pd Nanoparticles with Superior Catalytic Properties in Aerobic Oxidation of Benzyl Alcohol and Glycerol
Author(s) -
Wang Liang,
Zhang Wei,
Zeng Shangjing,
Su Dangsheng,
Meng Xiangju,
Xiao Fengshou
Publication year - 2012
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201200271
Subject(s) - bimetallic strip , benzyl alcohol , chemistry , catalysis , nanoparticle , alcohol oxidation , glycerol , high resolution transmission electron microscopy , alcohol , metal , solvent , organic chemistry , chemical engineering , transmission electron microscopy , engineering
Nano‐sized Au and Pd catalysts are favorable for oxidations with molecular oxygen, and the preparation of this kind of nanoparticles with high catalytic activities is strongly desirable. We report a successful synthesis of bimetallic Au‐Pd nanoparticles with rich edge and corner sites on unique support of Mg‐Al mixed oxides (Au‐Pd/MAO), which are favorable for producing metal nanoparticles with high degree of coordinative unsaturation of metal atoms. The systematic microscopic characterizations confirm the bimetallic Au‐Pd nanoparticles are present as Au‐Pd alloy. The irregular shape of the bimetallic nanoparticles are directly observed in HRTEM images. As we expected, Au‐Pd/MAO gives very excellent catalytic performances in the aerobic oxidation of benzyl alcohol and glycerol. For example, Au‐Pd/MAO shows very high TOF of 91000 h −1 at 433 K with molecular oxygen at air pressure in solvent‐free oxidation of benzyl alcohol; this catalyst also shows relatively high selectivity for tartronic acid (TARAC, 36.6%) at high conversion (98.5%) in aerobic oxidation of glycerol. The superior catalytic properties of Au‐Pd/MAO would be potentially important for production of fine chemicals.