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Au‐Promoted Pt nanoparticles supported on MgO / SBA ‐15 as an efficient catalyst for selective oxidation of glycerol
Author(s) -
Liu Yibin,
Zha Minghao,
Qin Hansong,
Yao Shuang,
Zhou Xin,
Zhao Siming,
Sheng Nan,
Sun Yinghao,
Jin Xin,
Yan Hao,
Feng Xiang,
Chen Xiaobo,
Yang Chaohe
Publication year - 2021
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.17196
Subject(s) - bimetallic strip , catalysis , chemistry , glycerol , nanoparticle , selectivity , chemical engineering , adsorption , organic chemistry , engineering
A systematic study of Au‐promoted and unpromoted Pt/MgO/SBA‐15 catalyst is developed to separate the promoter effect from electron transfer effect between Au and Pt. Multi‐characterizations revealed that Au and Pt metals in these bimetallic catalysts mainly exist in the form of alloy, and the main role of Au is to reduce the size of AuPt alloy nanoparticles, thus enhancing the adsorption and activation of intermediate products. Through the optimization of various factors (including MgO content, Au/Pt molar ratio, reaction temperature and time), the Au 1 Pt 2 /MgO/SBA‐15 (0.05) catalyst exhibits excellent catalytic activity and glyceric acid selectivity for the selective oxidation of glycerol. Density functional theory calculation confirmed that the synergistic effect between Pt and Au active sites could facilitate the oxidation of primary hydroxyl group by promoting the activation of CH bond and the oxidation of aldehyde group. The results may give insights on designing effective Pt based bimetallic catalyst for selective oxidation of glycerol.