Direct synthesis of formic acid from carbon dioxide by hydrogenation in acidic media.

Direct synthesis of formic acid from carbon dioxide by hydrogenation in acidic media.
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DOI:
10.1038/ncomms5017
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发表时间:
2014-06-02
影响因子:
16.6
通讯作者:
Laurenczy, Gabor
Laurenczy, Gabor
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Moret, Severine;Dyson, Paul J.;Laurenczy, Gabor

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由于人类活动导致大气中的二氧化碳浓度持续上升,二氧化碳的化学转化为有用的产物变得越来越重要。在本文中,我们描述了在水溶液和二甲基亚砜(DMSO)中,不使用任何添加剂的情况下,使用均相钌催化剂将CO2直接加氢成甲酸。在40°C的水中,在200 bar下可以得到0.2 M甲酸,而在DMSO中,同样的催化剂可以产生1.9 M甲酸。在这两种溶剂中,催化剂可以多次重复使用而不降低活性。全世界对甲酸的需求持续增长,特别是在可再生能源氢载体的背景下,通过直接催化二氧化碳加氢,从无碱的二氧化碳中生产甲酸,比现有的路线更具可持续性。将二氧化碳转化为甲酸对能源储存和化学生产具有吸引力,但通常使用碱或其他添加剂使游离酸的分离变得困难。在这里,作者报告了不需要任何添加剂的催化将二氧化碳转化为甲酸。
The chemical transformation of carbon dioxide into useful products becomes increasingly important as CO2 levels in the atmosphere continue to rise as a consequence of human activities. In this article we describe the direct hydrogenation of CO2 into formic acid using a homogeneous ruthenium catalyst, in aqueous solution and in dimethyl sulphoxide (DMSO), without any additives. In water, at 40 °C, 0.2 M formic acid can be obtained under 200 bar, however, in DMSO the same catalyst affords 1.9 M formic acid. In both solvents the catalysts can be reused multiple times without a decrease in activity. Worldwide demand for formic acid continues to grow, especially in the context of a renewable energy hydrogen carrier, and its production from CO2 without base, via the direct catalytic carbon dioxide hydrogenation, is considerably more sustainable than the existing routes. The conversion of carbon dioxide into formic acid is attractive for energy storage and chemical production, but the typical use of bases or other additives make isolation of the free acid difficult. Here, the authors report the catalytic conversion of carbon dioxide into formic acid without the need for any additives.
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