Ontology type: schema:ScholarlyArticle Open Access: True
2019-12
AUTHORSXiaojuan Zhu, Qishui Guo, Yafei Sun, Shangjun Chen, Jian-Qiang Wang, Mengmeng Wu, Wenzhao Fu, Yanqiang Tang, Xuezhi Duan, De Chen, Ying Wan
ABSTRACTUnderstanding the catalytic mechanism of bimetallic nanocatalysts remains challenging. Here, we adopt an adsorbate mediated thermal reduction approach to yield monodispersed AuPd catalysts with continuous change of the Pd-Au coordination numbers embedded in a mesoporous carbonaceous matrix. The structure of nanoalloys is well-defined, allowing for a direct determination of the structure-property relationship. The results show that the Pd single atom and dimer are the active sites for the base-free oxidation of primary alcohols. Remarkably, the d-orbital charge on the surface of Pd serves as a descriptor to the adsorbate states and hence the catalytic performance. The maximum d-charge gain occurred in a composition with 33-50 at% Pd corresponds to up to 9 times enhancement in the reaction rate compared to the neat Pd. The findings not only open an avenue towards the rational design of catalysts but also enable the identification of key steps involved in the catalytic reactions. More... »
PAGES1428
http://scigraph.springernature.com/pub.10.1038/s41467-019-09421-5
DOIhttp://dx.doi.org/10.1038/s41467-019-09421-5
DIMENSIONShttps://app.dimensions.ai/details/publication/pub.1113059672
PUBMEDhttps://www.ncbi.nlm.nih.gov/pubmed/30926804
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