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Nickel Promoted Palladium Nanoparticles for Electrocatalysis of Carbohydrazide Oxidation Reaction
Author(s) -
Guo Min,
Wang Haining,
Cui Liting,
Zhang Jin,
Xiang Yan,
Lu Shanfu
Publication year - 2019
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201900929
Subject(s) - carbohydrazide , catalysis , palladium , electrocatalyst , hydrazine (antidepressant) , nickel , materials science , non blocking i/o , nanoparticle , inorganic chemistry , reversible hydrogen electrode , chemistry , nanotechnology , electrochemistry , electrode , metallurgy , working electrode , organic chemistry , chromatography
Carbohydrazide is a potential alternative to toxic hydrazine for fuel cell applications to overcome the challenges of storage and transportation of hydrogen. In this work, Ni‐alloyed Pd nanoparticles (NPs) with varied Pd–Ni ratios supported on carbon black (PdNi x /C) are prepared and their catalytic performance for the carbohydrazide electro‐oxidation reaction is investigated. The catalytic performance of PdNi x /C NPs is significantly improved in comparison to Pd/C NPs. The current density of PdNi x /C NPs with optimized Pd–Ni atom ratio can reach 3.26 A mg −1 metal at a potential of 0.4 V (vs reversible hydrogen electrode), which is an increase of 2.4 times compared to that of Pd/C. The density functional theory calculation indicates the enhanced catalytic activity is caused by the change of adsorption energy of carbohydrazide molecules on the metal surface. It exhibits a volcano relationship between the adsorption energy and the catalytic current density of PdNi x /C with varied Pd–Ni atom ratios.