Efficient Cu catalyst for 5-hydroxymethylfurfural hydrogenolysis by forming Cu–O–Si bonds,Catalysis Science & Technology

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Efficient Cu catalyst for 5-hydroxymethylfurfural hydrogenolysis by forming Cu–O–Si bonds
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2020-08-25 , DOI: 10.1039/d0cy01032d
Yifeng Zhu _{1,

2,

3,

4,

5} , Xiao Kong _{6,

7,

8,

9} , Bo Peng _{5,

10,

11} , Luping Li _{6,

7,

8,

9} , Zhen Fang _{6,

7,

8,

9} , Yulei Zhu _{1,

2,

3,

4,

5}

Affiliation

Selective hydrogenolysis of C–O bonds of biomass derived precursors has been identified as a promising and essential way to produce fuel additives. Supported transition metals were explored to give efficient reactivity commonly based on a bifunctionality strategy. Here, we report that covalent bonding between SiO₂ and Cu features a homologous bifunctional catalyst with metallic Cu and Lewis acidic Cu cations. The catalyst gave superior reactivity for the conversion of 5-hydroxymethylfurfural into 2,5-dimethylfuran. Lewis acidic cations had more predominant roles than metallic sites for C–O hydrogenolysis by stretching and dissociating C–O bonds, whereas they remained inactive for C [double bond, length as m-dash]

C bonds. The results rationalize the valence-state-sensitive catalysis for chemistry involving C–O cleavage. The covalent metal–O–Si bonding provides an alternative for developing efficient catalysts since silicates with such a feature are versatile in nature.

中文翻译：

通过形成Cu–O–Si键的5-羟甲基糠醛氢解的高效Cu催化剂

生物质衍生的前体的C–O键的选择性氢解已被认为是生产燃料添加剂的一种有前途且必不可少的方法。通常在双功能策略的基础上，研究了负载的过渡金属以提供有效的反应性。在这里，我们报道了SiO ₂和Cu之间的共价键特征是具有金属Cu和路易斯酸性Cu阳离子的同源双功能催化剂。该催化剂对于5-羟甲基糠醛向2，5-二甲基呋喃的转化具有优异的反应性。路易斯酸性阳离子通过延伸和解离C-O键，比金属位置对C-O氢解作用起主要作用，而它们对C保持惰性 [双键，长度为m-破折号]