Solid base catalysed 5-HMF oxidation to 2,5-FDCA over Au/hydrotalcites: fact or fiction?
Solid base catalysed 5-HMF oxidation to 2,5-FDCA over Au/hydrotalcites: fact or fiction?
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DOI:
10.1039/c5sc00854a
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发表时间:
2015-08-01
期刊:
影响因子:
8.4
通讯作者:
Wilson K
中科院分区:
文献类型:
--
作者:
Ardemani L;Cibin G;Dent AJ;Isaacs MA;Kyriakou G;Lee AF;Parlett CMA;Parry SA;Wilson K
Synergistic effects between alkali-free hydrotalcites and gold nanoparticles afford efficient heterogeneous catalysts for the cascade oxidation of 5-HMF to 2,5-FDCA. Nanoparticulate gold has emerged as a promising catalyst for diverse mild and efficient selective aerobic oxidations. However, the mechanism of such atom-economical transformations, and synergy with functional supports, remains poorly understood. Alkali-free Mg–Al hydrotalcites are excellent solid base catalysts for the aerobic oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furan dicarboxylic acid (FDCA), but only in concert with high concentrations of metallic gold nanoparticles. In the absence of soluble base, competitive adsorption between strongly-bound HMF and reactively-formed oxidation intermediates site-blocks gold. Aqueous NaOH dramatically promotes solution phase HMF activation, liberating free gold sites able to activate the alcohol function within the metastable 5-hydroxymethyl-2-furancarboxylic acid (HMFCA) reactive intermediate. Synergistic effects between moderate strength base sites within alkali-free hydrotalcites and high gold surface concentrations can afford highly selective and entirely heterogeneous catalysts for aqueous phase aldehyde and alcohol cascade oxidations pertinent to biomass transformation.
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影响因子:
5
作者:
Miao, Zhenzhen;Zhang, Yibo;Yang, Xiangguang
通讯作者:
Yang, Xiangguang
影响因子:
--
作者:
Biella, S;Prati, L;Rossi, M
通讯作者:
Rossi, M
DOI:
10.1146/annurev-anchem-061010-113906
发表时间:
2011-01-01
期刊:
ANNUAL REVIEW OF ANALYTICAL CHEMISTRY, VOL 4
影响因子:
--
作者:
Frenkel, Anatoly I.;Yevick, Aaron;Vasic, Relja
通讯作者:
Vasic, Relja
影响因子:
5.5
作者:
Cantrell, DG;Gillie, LJ;Wilson, K
通讯作者:
Wilson, K
影响因子:
8.4
作者:
Casanova, Onofre;Iborra, Sara;Corma, Avelino
通讯作者:
Corma, Avelino