Subnanometric Hybrid Pd-M(OH)2, M = Ni, Co, Clusters in Zeolites as Highly Efficient Nanocatalysts for Hydrogen Generation
作者:Qiming Sun、Ning Wang、Qiming Bing、Rui Si、Jingyao Liu、Risheng Bai、Peng Zhang、Mingjun Jia、Jihong Yu
DOI:10.1016/j.chempr.2017.07.001
日期:2017.9
synthesis method. The hybrid bimetallic nanocatalysts exhibit excellent shape-selective catalytic performance and superior thermal stability. The incorporation of secondary Ni(OH)2 species in S-1 can considerably increase the catalytic activity of the Pd nanoclusters for the dehydrogenation of formic acid (FA) as a result of the electron-enriched Pd surface and bimetallic interfacial effect. Notably
杂化多金属纳米催化剂由于金属种类的协同作用和明显改善的催化性能而引起了越来越多的关注,但是它们经常遭受严重的烧结和差的稳定性。在这里,我们展示了一种通过水热合成方法在silicalite-1(S-1)沸石中制备亚纳米杂化双金属簇Pd-M(OH)2(M = Ni,Co)的简便策略。杂化双金属纳米催化剂表现出优异的择形催化性能和优异的热稳定性。二级Ni(OH)2的引入由于电子富集的Pd表面和双金属界面效应,S-1中的Sb物种可以大大提高Pd纳米簇对甲酸(FA)脱氢的催化活性。值得注意的是,在60°C下,没有任何添加剂的情况下,朝着完全FA分解,0.8Pd0.2Ni(OH)2 @ S-1催化剂可提供最高的初始周转频率值,最高可达5,803 hr -1。局限在沸石中的亚纳米杂化双金属簇的优异的催化性能和出色的稳定性为其实用的高性能催化应用创造了新的前景。