低温等离子体制备改性催化剂

低温等离子体在催化剂制备与改性中具有一些特殊效应,本文通过分析低温等离子体处理代替焙烧制备催化剂、低温等离子体处理结合传统热力学改性强化催化剂两个方向的研究,总结了低温等离子体在改善催化剂结构和表面性能、强化负载-载体之间的相互作用、构建传统制备不易得到的催化剂化学形态等方面的研究发现,并对低温等离子体处理所取得的优良效果进行作用机理分析总结。此外,概述了不同低温等离子体发生装置在强化制备催化剂过程中的应用,并对不同发生装置所造成的影响进行分析、对比。最后,根据目前研究进展对低温等离子体制备与改性强化催化剂的现状进行分析与未来展望。

Latest Advance in Synthesisand Modification of Catalysts with Low Temperature Plasma

The latest development in synthesis and modification of catalysts,at nano scales with low temperature(LT)plasma,was briefly reviewed.The discussions with specific examples focused on:i)The advangtages of LT-plasma over conventioanl synthesis/modification techniques of catalysts,including but not limited to the milder reaction conditions,fewer limitations,high-energy electrons/ions-induced direct/indirect oxidation/reduction/creation of active sites,larger reaction area,faster reaction-rate,lower carbon accumulation/contamination,much less agglomeration/sintering of catalyst frameworks,higher efficiency,greater environmental friendliness and lower energy consumption;ii)Strengths/weakness of LT-plasma sources available,including the glow/corona/dielectric-barrier discharges and plasma jet;iii)The impact of LT-plasma irradiation on the characteristics of catalysts.Moreover,the development trends,basic and technological problems and possible solutions in synthesis/modification of catalysts with LT-plasma were also tentatively discussed in a thought provoking way.