Biologically bound nickel as a sustainable catalyst for the selective hydrogenation of cinnamaldehyde
Biologically bound nickel as a sustainable catalyst for the selective hydrogenation of cinnamaldehyde
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DOI：
10.1016/j.apcatb.2022.121105
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发表时间：
2022-01-22
影响因子：
22.1
通讯作者：
Clark, James H.
中科院分区：
文献类型：
--
作者：
Johar, Parul;McElroy, C. Robert;Clark, James H.
随着对未来生物精炼厂关键元素可持续性的担忧日益增加，将植物提取的镍（来自污染土地）转化为廉价和清洁的催化剂可能有助于减少对原生贵金属的需求。利用这种绿色方法，需要大量下游加工的贵金属催化剂可能会被自然开发的非贵金属催化剂取代。我们报道了一种生物结合的非贵金属催化剂（Ni-phytocat，0.1- 2.5wt%Ni），其使用简单的、一步的、节能的、微波辅助热解（250 ℃，200 W，< 10分钟）制备。在植物基质中的生物结合的Ni引导肉桂醛的催化氢化选择性和有效性（高达97%的转化率和96%的选择性，在T&LE;120 &DEG; C），我们的研究结果表明，生物碳基质周围的植物提取的Ni的存在能够有效抑制过度氢化反应途径，并防止吸附的氢化肉桂醛分子的进一步解离。简单、长期稳定和易于处理使该催化剂成为雷尼镍和贵金属基催化剂的经济和环境有吸引力的替代品。
With mounting concerns over critical element sustainability in future bio-refineries, the conversion of phytoextracted nickel (from contaminated lands) into an inexpensive and clean catalyst could help to reduce demand for virgin precious metals. Utilizing this green approach, noble metal catalysts, which require substantial downstream processing, could potentially be replaced by a naturally developed non-noble metal catalyst. We report a biologically bound non-noble metal catalyst (Ni-phytocat, 0.1-2.5 wt% Ni) prepared using simple, onestep, energy efficient, microwave-assisted pyrolysis (250 & DEG;C, 200 W, < 10 min). The biologically bound Ni in the plant matrix directs the catalytic hydrogenation of cinnamaldehyde selectively and efficiently (up to 97% conversion and 96% selectivity at T & LE;120 & DEG;C), Our findings indicate that the presence of bio-carbon matrix around the phyto-extracted Ni enables an efficient suppression of the over-hydrogenation reaction pathway and prevents further dissociation of adsorbed hydrocinnamaldehyde molecules. The simplicity, long-term stability and ease of handling make this catalyst an economically and environmentally attractive alternative to Raney nickel and precious metal-based catalysts.