氮氧化物
纳米团簇
催化作用
选择性催化还原
还原(数学)
选择性还原
化学
材料科学
纳米技术
生物化学
有机化学
几何学
数学
燃烧
作者
Yong Yin,Bing Luo,Kezhi Li,Benjamin M. Moskowitz,Bar Mosevitzky Lis,Israel E. Wachs,Minghui Zhu,Yanan Sun,Tianle Zhu,Xiang Li
标识
DOI:10.1038/s41467-024-47878-1
摘要
Abstract Supported nanoclusters (SNCs) with distinct geometric and electronic structures have garnered significant attention in the field of heterogeneous catalysis. However, their directed synthesis remains a challenge due to limited efficient approaches. This study presents a plasma-assisted treatment strategy to achieve supported metal oxide nanoclusters from a rapid transformation of monomeric dispersed metal oxides. As a case study, oligomeric vanadia-dominated surface sites were derived from the classic supported V 2 O 5 -WO 3 /TiO 2 (VWT) catalyst and showed nearly an order of magnitude increase in turnover frequency (TOF) value via an H 2 -plasma treatment for selective catalytic reduction of NO with NH 3 . Such oligomeric surface VO x sites were not only successfully observed and firstly distinguished from WO x and TiO 2 by advanced electron microscopy, but also facilitated the generation of surface amide and nitrates intermediates that enable barrier-less steps in the SCR reaction as observed by modulation excitation spectroscopy technologies and predicted DFT calculations.
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