Dipartimento di Ingegneria Meccanica, Chimica, e dei Materiali, CSGI Cagliari Research Unit, Università degli Studi di Cagliari, via Marengo 2, 09123, Cagliari, Italy.
Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, SS 554 bivio per Sestu, 09042, Monserrato, CA, Italy.
Sci Rep. 2023 Feb 11;13(1):2470. doi: 10.1038/s41598-023-28972-8.
In this work, we highlight and measure the intensity of mechanochemical effects at work in the hydrogenation of carbon monoxide by comparing the activity of a supported Co-Fe catalyst subjected, respectively, to ball milling and simple powder agitation. Paying due regard to the discontinuous nature of ball milling, we show that mechanochemical hydrogenation proceeds at significantly higher rate and disclose its connection with individual impacts. Experimental evidence suggests that the enhanced catalytic activity we observe can be ascribed to local processes affecting the amount of powder that gets involved in individual impacts.
在这项工作中，我们通过比较经过球磨和简单粉末搅拌的负载型 Co-Fe 催化剂的活性，突出并测量了一氧化碳加氢过程中机械化学效应的强度。我们充分考虑到球磨的不连续性，表明机械化学加氢反应以显著更高的速率进行，并揭示了其与单个冲击的关系。实验证据表明，我们观察到的增强的催化活性可以归因于影响参与单个冲击的粉末量的局部过程。
