JACS: Reaction-Induced Strong Metal-Support Interactions betweenMetals and Inert Boron Nitride Nanosheets
发布时间：2020-11-23 作者：Jinhu Dong, Qiang Fu,*Haobo Li, Jianping Xiao, Bing Yang, Bingsen Zhang, Yunxing Bai,Tongyuan Song, Rankun Zhang, Lijun Gao, Jun Cai, Hui Zhang, Zhi Liu, and Xinhe Bao
J.Am.Chem.Soc.2020, 142, 17167？17174
ABSTRACT:Encapsulation of metal nanocatalysts by support-derived materials is well known as a classical strong metal？supportinteraction (SMSI) effect that occurs almost exclusively with activeoxide supports and often blocks metal-catalyzed surface reactions.In the present work this classical SMSI process has beensurprisingly observed between metal nanoparticles, e.g., Ni, Fe,Co, and Ru, and inert hexagonal boron nitride (h-BN) nanosheets.Wefind that weak oxidizing gases such as CO2and H2O inducethe encapsulation of nickel (Ni) nanoparticles by ultrathin boronoxide (BOx) overlayers derived from the h-BN support (Ni@BOx/h-BN) during the dry reforming of methane (DRM) reaction. In-situ surface characterization and theory calculations reveal thatsurface B？O and B？OH sites in the formed BOxencapsulation overlayers work synergistically with surface Ni sites to promote theDRM process rather than blocking the surface reactions.
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