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Effect of Hexadecylpyridinium Bromide (HDPB) on Morphology and Electrocatalytic Performance of Porous Palladium Nanoparticles
Author(s) -
Cui Zelin,
Bai Xuefeng,
Liu Teng
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201903892
Subject(s) - bromide , palladium , transmission electron microscopy , catalysis , nanoparticle , methanol , porosity , chemical engineering , morphology (biology) , chemistry , materials science , nanotechnology , inorganic chemistry , organic chemistry , biology , engineering , genetics
Structure‐controlled synthesis of palladium nanoparticles has long been a hot subject because of their remarkable catalytic performance. Herein, hexadecylpyridinium bromide (HDPB) was introduced as capping agent in the preparation of Pd nanoparticles (PdNPs) through a facile none‐seeded routine using Na 2 PdCl 4 as precursor. The as‐prepared PdNPs was in the shape of flocculus and it had a highly porous feature with an average size of 53.1 nm. The morphology evolution along with time was investigated by transmission electron microscopy and a possible formation mechanism of PdNPs was proposed. Meanwhile, the structural changes of PdNPs along with the concentration of HDPB and temperature were also studied. The relationship between structure and electrocatalytic activity were discussed. The electrocatalytic performance of PdNPs was much superior than commercial Pd/C toward methanol electro‐oxidation in the alkaline medium. The optimum electrocatalytic activity (j f =19.4 mA cm −2 ) was obtained catalyzing by PdNPs synthesized when n(HDPB)/n(Pd 2+ )=0.6 : 1 at 50°C for 3 h.