Introduction of TiO2 enhancing the catalytic performance of Ti(SO4)2/SiO2 for dimethyl ether oxidation,Chemical Communications

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Introduction of TiO2 enhancing the catalytic performance of Ti(SO4)2/SiO2 for dimethyl ether oxidation
Chemical Communications ( IF 4.3 ) Pub Date : 2023-11-10 , DOI: 10.1039/d3cc04819e
Guozhuang Cao _{1,

2} , Xiujuan Gao ₁ , Faen Song ₁ , Xiaqing Wang _{1,

2} , Xiaoxing Wang ₁ , Junfeng Zhang ₁ , Yizhuo Han ₁ , Qingde Zhang ₁

Affiliation

The introduction of a small amount of TiO₂ changes the surface properties of the SiO₂ material, which further significantly affects the dispersion state of Ti(SO₄)₂. The differences in acidity and redox caused by the distribution of Ti(SO₄)₂ are closely related to the catalyst performance for dimethyl ether (DME) oxidation. In particular, the calcination temperature could adjust the surface hydroxyl content of TiO₂/SiO₂, which determines the dispersion of Ti(SO₄)₂ components, resulting in distinct acid sites and Ti valence. The most number of weak acid sites and the highest proportion of Ti³⁺/Ti⁴⁺ in the Ti(SO₄)₂/TS-400 °C catalyst remarkably promote the formation of dimethoxymethane (DMM) from 14.4% to 82.6%, compared to the Ti(SO₄)₂/SiO₂ catalyst.

中文翻译：

TiO2 的引入增强了 Ti(SO4)2/SiO2 对二甲醚氧化的催化性能

少量TiO ₂的引入改变了SiO ₂材料的表面性质，进而显着影响Ti(SO ₄ ) ₂的分散状态。 Ti(SO ₄ ) ₂分布引起的酸度和氧化还原差异与二甲醚(DME)氧化催化剂性能密切相关。特别是，煅烧温度可以调节TiO ₂ /SiO ₂的表面羟基含量，这决定了Ti(SO ₄ ) ₂组分的分散性，从而产生不同的酸位和Ti价态。 Ti(SO ₄ ) ₂ /TS-400 °C催化剂中最多的弱酸位和最高的Ti ³⁺ /Ti ⁴⁺比例显着促进了二甲氧基甲烷(DMM)的生成，从14.4%提高到82.6%，与Ti(SO ₄ ) ₂ /SiO ₂催化剂相比。

更新日期：2023-11-10

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