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Facile Transformation of Ni‐based Colloids into Highly Stable Nanocatalysts Embedded within h‐BN for the Water‐Gas Shift Reaction
Author(s) -
Gao Lijun,
Ta Na,
Dong Jinhu,
Song Tongyuan,
Chen Siru,
Fu Qiang
Publication year - 2020
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201902263
Subject(s) - nanomaterial based catalyst , materials science , catalysis , chemical engineering , colloid , nanotechnology , heterogeneous catalysis , nanoparticle , water gas shift reaction , nanostructure , metal , chemistry , organic chemistry , metallurgy , engineering
Advances in colloidal chemistry allow to prepare well‐controlled nanostructures, while application of the colloids in heterogeneous catalysis is strongly impeded by the presence of organic capping layers. However, removal of the protection layers inevitably results in changes of the well‐defined nanostructures such as sintering and agglomeration. Here, a simple way is suggested to solve the dilemma by replacing the organic capping layers with another flexible but robust capping layers made of two‐dimensional materials. We show simultaneous removal of surfactant layers in B‐containing Ni, Co, and Fe colloids and formation of hexagonal boron nitride (h‐BN) capping layers over metal nanoparticles. Metal particle size can be well kept even upon thermal treatment at 850 °C and Ni nanocatalysts embedded within h‐BN shells present high catalytic performance in water‐gas shift reaction. This work suggests a facile strategy to promote the application of metal colloids in heterogeneous catalysis.