【摘 要】
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Phase engineering is arising as an attractive strategy to tune the properties and functionalities of nanomaterials.In particular,amorphous/crystalline heteropha
【机 构】
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Center for Programmable Materials,School of Materials Science and Engineering,Nanyang Technological
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Phase engineering is arising as an attractive strategy to tune the properties and functionalities of nanomaterials.In particular,amorphous/crystalline heterophase nanostructures have exhibited some intriguing properties.Herein,the one-pot wet-chemical synthesis of two types of amorphous/crystalline heterophase PdCu nanosheets is reported,in which one is amorphous phase-dominant and the other one is crystalline phase-dominant.Then the aging process of the synthesized PdCu nanosheets is studied,during which their crystallinity increases,accompanied by changes in some physicochemical properties.As a proof-of-concept application,their aging effect on catalytic hydrogenation of 4-nitrostyrene is investigated.As a result,the amorphous phase-dominant nanosheets initially show excellent chemoselectivity.After aging for 14 days,their catalytic activity is higher than that of crystalline phase-dominant nanosheets.This work demonstrates the intriguing properties of heterophase nanostructures,providing a new platform for future studies on the regulation of functionalities and applications ofnanomaterials by phase engineering.
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