期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 142, 期 40, 页码 17167-17174出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.0c08139
关键词
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资金
- National Natural Science Foundation of China [21825203, 21688102, 91945302, 11227902, 21761132025]
- Ministry of Science and Technology of China [2016YFA0200200, 2017YFB0602205]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB17020000]
- Dalian National Laboratory for Clean Energy (DNL) Cooperation Fund [DNL201907]
- Youth Innovation Promotion Association CAS [2015152]
Encapsulation of metal nanocatalysts by support-derived materials is well known as a classical strong metal-support interaction (SMSI) effect that occurs almost exclusively with active oxide supports and often blocks metal-catalyzed surface reactions. In the present work this classical SMSI process has been surprisingly observed between metal nanoparticles, e.g., Ni, Fe, Co, and Ru, and inert hexagonal boron nitride (h-BN) nanosheets. We find that weak oxidizing gases such as CO2 and H2O induce the encapsulation of nickel (Ni) nanoparticles by ultrathin boron oxide (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 that surface B-O and B-OH sites in the formed BOx encapsulation overlayers work synergistically with surface Ni sites to promote the DRM process rather than blocking the surface reactions.
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