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Invited Review for Acc. Chem. Res. Written by DICP Scientists on Interface Confined Effect in Heterogeneous Catalysis
  English.dicp.cas.cn    Posted:2013-03-26

In recent years, studies on the interface confined effect in heterogeneous catalysis conducted by DICP researchers of the State Key Laboratory of Catalysis have attracted extensive attentions from international catalytic scientists. Accordingly, the journal of Accounts of Chemical Research has invited the DICP scientists to write a review on the research accomplishments in this area, and the title was “Interface-confined oxide nanostructures for catalytic oxidation reactions”Qiang Fu, Fan Yang, Xinhe Bao, Acc. Chem. Res. 2013, doi: 10/1021/ar300249b.

The DICP team of Nano and Interface Catalysis first constructed a coordinatively unsaturated ferrous structure (CUF) on a platinum surface, and then observed that due to a synergistic action between the interface-confined CUF sites and the Pt surface, the catalyst so formed exhibited very unique catalytic activities towards low-temperature activation of oxygen molecules. Thus, this kind of catalysts could be applied for selective oxidation of CO in hydrogen-rich atmospheres. Specifically, this kind of catalysts has been employed for a highly efficient removal of traces of CO under practical operating conditions of proton exchange membrane fuel cells(PEMFC) (Science, 2010, 328, 1141; E&ES 2012, 5, 6313. Following this achievement, the concept of interface-confined catalysts was further extended to Pt-NiJACS, 2011, 133, 1978) and Pt-Co (ChemCatChem 2012, 4, 1645) catalyst systems, thus confirming that oxides of 3d transition metals and Pt can form highly efficient oxide-on-metal inverted catalysts. Recently, this DICP research team has found further that this kind of highly active surface oxide structures could exist stably on monolayer Pt as well as on non-platinum metals such as gold and silver, and all showed excellent catalytic activities. This implied that such oxide/metal inverted catalysts have potentials for diminishing the amount of noble metals or even for replacing noble metals on catalysts. It can be conceived that these novel catalytic active structures have opened a new route for directed synthesis of new and efficient nano catalysts systems.

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