Atom efficient PtCu bimetallic catalysts and ultra dilute alloys for the selective hydrogenation of furfural
Atom efficient PtCu bimetallic catalysts and ultra dilute alloys for the selective hydrogenation of furfural
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DOI：
10.1016/j.apcatb.2020.119737
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发表时间：
2021-05-05
影响因子：
22.1
通讯作者：
Kyriakou, Georgios
中科院分区：
文献类型：
--
作者：
Taylor, Martin J.;Beaumont, Simon K.;Kyriakou, Georgios
研究了Pt:Cu双金属纳米颗粒液相选择性加氢糠醛（一种重要的平台生物质原料）。这两种金属的合金化对整体催化活性产生了深远的影响，提供了优越的反应速率，并实现了对糠醇所需的高选择性。此外，我们研究了一种超稀合金（UDA）的催化活性，这种超稀合金是通过在分散的Cu纳米粒子（Pt:Cu原子比1:20）上用Pt原子电替换Cu原子形成的。在克服诱导期后，在10和20巴的适度氢压力下，该UDA表现出异常高的初始氢化速率，与单金属Pt（含Pt的12倍）的催化转化率相当，并优于纯Cu或其他双金属纳米颗粒合金催化剂成分。由于它们的活性和更大的经济可行性，这些原子高效催化剂是糠醛增值的理想候选物。
A range of Pt:Cu bimetallic nanoparticles were investigated for the liquid-phase selective hydrogenation of furfural, an important platform biomass feedstock. Alloying of the two metals had a profound effect on the overall catalytic activity, providing superior rates of reaction and achieving the needed high selectivity towards furfuryl alcohol. Furthermore, we investigated the catalytic activity of an Ultra Dilute Alloy (UDA) formed via the galvanic replacement of Cu atoms by Pt atoms on dispersed host Cu nanoparticles (atomic ratio Pt:Cu 1:20). This UDA, after overcoming an induction period, exhibits exceptionally high initial rates of hydrogenation under modest hydrogen pressures of 10 and 20 bar, rivalling the catalytic turnover for the monometallic Pt (containing 12 times more Pt), and outdoing the pure Cu or other compositions of bimetallic nanoparticle alloy catalysts. These atom efficient catalysts are ideal candidates for the valorization of furfural due to their activity and vastly greater economic viability.