期刊
ACS APPLIED NANO MATERIALS
卷 1, 期 12, 页码 6692-6700出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.8b01506
关键词
oxygen rich h-BN; Cu nanoparticles; p-nitrophenol reduction; metal support interaction; mesopores; first-principles calculations
资金
- National Natural Science Foundation of China [21773217]
- China University of Geosciences
Hexagonal boron nitride (h-BN) with a unique 2D architecture is a promising support for catalyst due to its large surface area, high thermal stability, and chemical inertness. However, the weak interaction between h-BN and active metal particles would lead to unexpected agglomeration or loss of active components. In this work, an oxygen-rich mesoporous boron nitride (BNO) support was synthesized by a two-step calcining process, on which Cu nanoparticles were dispersed via a typical adsorption reduction procedure. The reduction of p-nitrophenol (4-NP) was successively carried out as a model reaction to determine the catalytic performance of the Cu/BNO catalyst. Excellent catalytic activity of 4-NP reduction was implemented with a reaction rate constant of 0.692 min(-1), which is maintained almost intact within five cycles. First-principles calculations suggest that the superior durability of Cu/BNO is largely attributed to the weakened conjugation effect of BNO upon O doping, which strengthens the interactions between Cu nanoparticles and BNO supports. Moreover, the doping O atom would significantly enrich the electron density of Cu, which is responsible for the superior activity toward 4-NP reduction.
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