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Facile Synthesis and in situ TEM Observation of Nanoporous Pd for Enhanced Catalytic Applications
Author(s) -
Liu Haiyang,
Ke Kai,
Li Chang,
Chen Xin,
Wu Yulian
Publication year - 2019
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201900037
Subject(s) - chemistry , catalysis , nanoparticle , porosity , nanoporous , aqueous solution , chemical engineering , in situ , noble metal , electrochemistry , nanotechnology , organic chemistry , materials science , electrode , engineering
Summary of main observation and conclusion A facile, efficient and green photochemical synthetic approach has been used to prepare sponge‐like porous Pd nanoparticles. Obtained by ultraviolet irradiation using a K 2 PdCl 4 precursor solution, the final products exhibited three dimensionally interconnected porous structures made up of ~3.6 nm sized Pd nanoparticles. In situ liquid cell TEM results indicated such porous structures are in a dynamic stable state when the particles are distributed in aqueous solution. The porous Pd nanoparticles exhibited electrochemical active surface area (ECSA) of up to 43 m 2 ·g –1 and mass activity of 1144 mA·mg –1 in menthol oxidation, k app of 0.22 min –1 and normalized k app / m ( k n ) of 8.3×10 4 min –1 ·g –1 in 4‐nitrophenol (4‐NP) reduction reactions. Comparing with the literature, it is demonstrated that our porous Pd nanoparticles with clean surfaces exhibited very high catalytic performances. This work may shed a light on facile and green synthesis of noble‐metal particles with better catalytic performances.