Single-atom catalysis of CO oxidation using Pt1/FeOx
Author: ["Botao Qiao","Aiqin Wang","Xiaofeng Yang","Lawrence F. Allard","Zheng Jiang","Yitao Cui","Jingyue Liu","Jun Li","Tao Zhang"]
Publication: Nature Chemistry
CITE.CC academic search helps you expand the influence of your papers.
Abstract
Platinum-based heterogeneous catalysts are critical to many important commercial chemical processes, but their efficiency is extremely low on a per metal atom basis, because only the surface active-site atoms are used. Catalysts with single-atom dispersions are thus highly desirable to maximize atom efficiency, but making them is challenging. Here we report the synthesis of a single-atom catalyst that consists of only isolated single Pt atoms anchored to the surfaces of iron oxide nanocrystallites. This single-atom catalyst has extremely high atom efficiency and shows excellent stability and high activity for both CO oxidation and preferential oxidation of CO in H2. Density functional theory calculations show that the high catalytic activity correlates with the partially vacant 5d orbitals of the positively charged, high-valent Pt atoms, which help to reduce both the CO adsorption energy and the activation barriers for CO oxidation. An important goal for the improvement of certain heterogeneous catalysts is to decrease the amount of platinum required while maintaining high catalytic activity. Now, the practical synthesis of a stable catalyst consisting of isolated single platinum atoms anchored onto iron oxide nanocrystallites has been developed that exhibits high activity for CO oxidation.
Cite this article
Qiao, B., Wang, A., Yang, X. et al. Single-atom catalysis of CO oxidation using Pt1/FeOx. Nature Chem 3, 634–641 (2011). https://doi.org/10.1038/nchem.1095
