The use of ultrasonic cavitation for near-surface structuring of robust and low-cost AlNi catalysts for hydrogen production
The use of ultrasonic cavitation for near-surface structuring of robust and low-cost AlNi catalysts for hydrogen production
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DOI：
10.1039/c5gc00047e
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发表时间：
2015-01-01
期刊：
影响因子：
9.8
通讯作者：
Andreeva, D. V.
中科院分区：
文献类型：
--
作者：
Cherepanov, P. V.;Melnyk, I.;Andreeva, D. V.
超声波引发的冲击波会刺激悬浮液中强烈的颗粒间碰撞，并在 AlNi 颗粒中产生较大的局部温度梯度。这些会在表面而不是颗粒内部触发相变。我们表明，超声波处理是在金属合金纳米厚的界面区域中形成所需成分梯度以及形成析氢反应有效催化剂的有效方法。
Ultrasonically induced shock waves stimulate intensive interparticle collisions in suspensions and create large local temperature gradients in AlNi particles. These trigger phase transformations at the surface rather than in the particle interior. We show that ultrasonic processing is an effective approach for developing the desired compositional gradients in nm-thick interfacial regions of metal alloys and formation of effective catalysts toward the hydrogen evolution reaction.