氨硼烷
材料科学
甲酸
催化作用
氨
甲醇
热解
硼烷
反应性(心理学)
二氧化碳
碳纤维
无机化学
氢
脱氢
有机化学
化学
复合数
替代医学
复合材料
病理
医学
作者
Carlos A. Castilla-Martinez,Bilge Coşkuner Fılız,Valérie Bert,Aysel Kantürk Fıgen,Umit B. Demirci
标识
DOI:10.1007/s11706-022-0610-z
摘要
Ammonia borane (NH3BH3) is a reducing agent, able to trap and convert carbon dioxide. In the present work, we used a reactive solid consisting of a mixture of 90 wt.% of NH3BH3 and 10 wt.% of palladium chloride, because the mixture reacts in a fast and exothermic way while releasing H2 and generating catalytic Pd0. We took advantage of such reactivity to trap and convert CO2 (7 bar), knowing besides that Pd0 is a CO2 hydrogenation catalyst. The operation (i.e. stage 1) was effective: BNH polymers, and B—O, C=O, C—O, and C—H bonds (like in BOCH3 and BOOCH groups) were identified. We then (in stage 2) pyrolyzed the as-obtained solid at 1250 °C and washed it with water. In doing so, we isolated cyclotriboric acid H3B3O6 (stemming from B2O3 formed at 1250 °C), hexagonal boron nitride, and graphitic carbon. In conclusion, the stage 1 showed that CO2 can be ‘trapped’ and converted, resulting in the formation of BOCH3 and BOOCH groups (possible sources of methanol and formic acid), and the stage 2 showed that CO2 transforms into graphitic carbon.
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