Plasma-assisted manipulation of vanadia nanoclusters for efficient selective catalytic reduction of NOx

Yong Yin, Bingcheng Luo, Kezhi Li, Benjamin M. Moskowitz, Bar Mosevitzky Lis, Israel E. Wachs (), Minghui Zhu (), Ye Sun, Tianle Zhu and Xiang Li ()
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Yong Yin: Beihang University
Bingcheng Luo: China Agricultural University
Kezhi Li: Sinopec Catalyst Co. Ltd.
Benjamin M. Moskowitz: Lehigh University
Bar Mosevitzky Lis: Lehigh University
Israel E. Wachs: Lehigh University
Minghui Zhu: East China University of Science and Technology
Ye Sun: Beihang University
Tianle Zhu: Beihang University
Xiang Li: Beihang University

Nature Communications, 2024, vol. 15, issue 1, 1-12

Abstract: 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 V2O5-WO3/TiO2 (VWT) catalyst and showed nearly an order of magnitude increase in turnover frequency (TOF) value via an H2-plasma treatment for selective catalytic reduction of NO with NH3. Such oligomeric surface VOx sites were not only successfully observed and firstly distinguished from WOx and TiO2 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.

Date: 2024
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DOI: 10.1038/s41467-024-47878-1

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