A boron-doped carbon aerogel-supported Cu catalyst for the selective hydrogenation of dimethyl oxalate,New Journal of Chemistry

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A boron-doped carbon aerogel-supported Cu catalyst for the selective hydrogenation of dimethyl oxalate
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2020/01/09 , DOI: 10.1039/c9nj05956c
Xiaodong Lu _{1,

2,

3,

4,

5} , Guofu Wang _{1,

2,

3,

4,

5} , Yu Yang _{1,

2,

3,

4,

5} , Xiangpeng Kong _{4,

5,

6} , Jiangang Chen _{1,

2,

3,

4,

5}

Affiliation

Carbon aerogels (CA) were applied in the synthesis of Cu/CA catalysts by the impregnation method and the catalysts with boron-doped CA supports were systematically characterized and evaluated in the hydrogenation of dimethyl oxalate (DMO). The Cu/xB–CA catalyst with 25 wt% copper showed 100% DMO conversion and the highest ethylene glycol (EG) or methyl glycolate (MG) selectivity of 70% at 230 °C as well as a lifetime of over 150 h. The characterization results disclosed the reason the performance of the catalysts could be tuned facilely by changing the amount of boron doping, which effectively influenced the interrelation between copper and CA, acidity and alkalinity of catalysts and Cu dispersion. Both the original carbon aerogels and that promoted with little B could provide larger surface areas and high dispersion of the metal. The species, size of copper particles and the ratio of Cu⁺/(Cu⁺ + Cu⁰) could be regulated by boron doping, thus adjusting the type of hydrogenation products.

中文翻译：

硼掺杂碳气凝胶负载的铜催化剂用于草酸二甲酯的选择性加氢

通过浸渍法将碳气凝胶（CA）应用于Cu / CA催化剂的合成中，并在草酸二甲酯（DMO）的加氢过程中系统地表征和评估了掺硼CA载体的催化剂。铜/ x含25％（重量）铜的B-CA催化剂在100°C时表现出100％的DMO转化率，最高的乙二醇（EG）或乙醇酸甲酯（MG）选择性达到70％，使用寿命超过150小时。表征结果揭示了通过改变硼掺杂量可以方便地调节催化剂性能的原因，这有效地影响了铜与CA之间的相互关系，催化剂的酸碱度和铜分散度。原始的碳气凝胶和少量B促进的碳气凝胶都可以提供更大的表面积和金属的高分散性。硼掺杂可以调节铜粒子的种类，大小和Cu ⁺ /（Cu ⁺ + Cu ⁰）的比例，从而调节氢化产物的类型。

更新日期：2020-02-24

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