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Title: Atomically precise single metal oxide cluster catalyst with oxygen-controlled activity
Authors: Li, Xinzhe
Guo, Na
Chen, Zhongxin
Zhou, Xin
Zhao, Xiaoxu
Du, Yonghua
Ma, Lu
Fang, Yiyun
Xu, Haomin
Yang, Huimin
Yu, Wei
Lu, Shangchen
Tian, Mingjiao
He, Qian
Loh, Kian Ping
Xi, Shibo
Zhang, Chun
Lu, Jiong
Keywords: Engineering::Materials
Issue Date: 2022
Source: Li, X., Guo, N., Chen, Z., Zhou, X., Zhao, X., Du, Y., Ma, L., Fang, Y., Xu, H., Yang, H., Yu, W., Lu, S., Tian, M., He, Q., Loh, K. P., Xi, S., Zhang, C. & Lu, J. (2022). Atomically precise single metal oxide cluster catalyst with oxygen-controlled activity. Advanced Functional Materials, 32(25), 2200933-.
Project: MOE2019-T2-2-044
Journal: Advanced Functional Materials
Abstract: Single cluster catalysts (SCCs) consisting of atomically precise metal nanoclusters dispersed on supports represent a new frontier of heterogeneous catalysis. However, the ability to synthesize SCCs with high loading and to precisely introduce non-metal atoms to further tune their catalytic activity and reaction scope of SCCs have been longstanding challenges. Here, a new interface confinement strategy is developed for the synthesis of a high density of atomically precise Ru oxide nanoclusters (Ru3O2) on reduced graphene oxide (rGO), attributed to the suppression of diffusion-induced metal cluster aggregation. Ru3O2/rGO exhibits a significantly enhanced activity for oxidative dehydrogenation of 1,2,3,4-tetrahydroquinoline (THQ) to quinoline with a high yield (≈86%) and selectivity (≈99%), superior to Ru and RuO2 nanoparticles, and homogeneous single/multiple-site Ru catalysts. In addition, Ru3O2/rGO is also capable of efficiently catalyzing more complex oxidative reactions involving three reactants. The theoretical calculations reveal that the presence of two oxygen atoms in the Ru3O2 motif not only leads to a weak hydrogen bonding interaction between the THQ reactant and the active site, but also dramatically depletes the density of states near the Fermi level, which is attributed to the increased positive valence state of Ru and the enhanced oxidative activity of the Ru3O2 cluster for hydrogen abstraction.
ISSN: 1616-301X
DOI: 10.1002/adfm.202200933
Rights: © 2022 Wiley-VCH GmbH. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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