期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 238, 期 -, 页码 51-60出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2018.07.001
关键词
Dry reforming of methane; Catalysts; Boron nitride; Density functional calculations
资金
- National Natural Science Foundation of China [21722704, U1462110]
- Science and Technology Commission of Shanghai Municipality [17230741400, 16DZ2292100, 15DZ2281400]
- Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan
- [17K1442907]
Efficient enhancement of catalytic stability and coke-resistance is a crucial aspect for dry reforming of methane. Here, we report Ni nanoparticles embedded on vacancy defects of hexagonal boron nitride nanosheets (Ni/h-BNNS) can optimize catalytic performance by taming two-dimensional (2D) interfacial electronic effects. Experimental results and density functional theory calculations indicate that surface engineering on defects of Ni/h-BNNS catalyst can strongly influence metal-support interaction via electron donor/acceptor mechanisms and favor the adsorption and catalytic activation of CH4 and CO2. The Ni/h-BNNS catalyst exhibits superior catalytic performance during a 120 h durability test. Furthermore, in situ techniques further reveal possible recovery mechanism of the active Ni sites, identifying the enhanced catalytic activities of the Ni/h-BNNS catalyst. This work highlights promotional mechanism of defect-modified interface and should be equally applicable for design of thermochemically stable catalysts.
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