Abstract

Transforming carbon dioxide (CO₂) into value-added fuels is an innovative way to address both the energy and the climate issues. In particular, formic acid, as formate salt, is recently attracting attention because this acid can be used as a chemical fuel in fuel cells. Here we present a novel method for hydrogenating CO₂-containing industrially relevant salts, such as sodium bicarbonate ammonium bicarbonate and ammonium carbonate, to formate. Metal sodium (Na₀) was used as the reducing agent to break the C–O bond and as a inducer of hydrogen transfer. A ball-milling mechanochemical method was used for the solid-phase reaction. Results show that reducing (NH₄)₂CO₃(s) with sodium yielded 41.4% formate after 7 h under catalyst-free conditions. Our new method has thus promising potential applications in the emerging CO₂ economy.

中文翻译：

---

机械化学作用的钠诱导的二氧化碳固相加氢制甲酸

摘要

将二氧化碳（CO ₂）转化为增值燃料是解决能源和气候问题的创新方法。尤其是，作为甲酸盐的甲酸最近受到关注，因为该酸可以用作燃料电池中的化学燃料。在这里，我们提出了一种将含CO ₂的工业上相关的盐（如碳酸氢钠，碳酸氢铵和碳酸铵）加氢成甲酸的新方法。金属钠（Na ₀）被用作还原C–O键的还原剂和氢转移的诱导剂。球磨机械化学方法用于固相反应。结果表明，还原（NH ₄）₂ CO ₃在无催化剂条件下7小时后，含钠的溶剂可生成41.4％的甲酸。因此，我们的新方法在新兴的CO ₂经济中具有广阔的应用前景。