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PdAg Nanoparticles with Different Sizes: Facile One‐Step Synthesis and High Electrocatalytic Activity for Formic Acid Oxidation
Author(s) -
Yang Lei,
Wang Yawen,
Feng Hetian,
Zeng Huajie,
Tan Changhui,
Yao Junjie,
Zhang Junchang,
Jiang Lin,
Sun Yinghui
Publication year - 2021
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.202001253
Subject(s) - bimetallic strip , formic acid , nanoparticle , chemical engineering , chemistry , alloy , solubility , adsorption , catalysis , inorganic chemistry , materials science , nanotechnology , organic chemistry , engineering
Recently, direct formic acid fuel cells (DFAFCs) which possess superior advantages such as a low operating temperature, light environmental pollution and high energy density, have been considered as one of the power generation technologies with a bright prospect. Herein, bimetallic PdAg nanoparticles (NPs) with different particle sizes were successfully produced via an easy one‐pot solvothermal co‐reduction synthetic route and their electrocatalytic performance for formic acid oxidation (FAO) were further investigated. In our strategy, the size of PdAg NPs can be easily controlled by only varying the concentration of precursors. The larger sized PdAg alloy (9.5 nm, noted as PdAg−L) was obtained at a low concentration of precursors, while the smaller PdAg alloy (3.7 nm, named as PdAg−S) was separated from the reaction system with higher solubility by centrifugation. The electrocatalytic activity and stability of the obtained PdAg NPs could be well optimized when incorporated with carbon (C), which is owing to a synergetic effect. The PdAg−S/C exhibits the highest mass activity with around 1.6 times that of PdAg−L/C and 2 times that of commercial Pd/C, which can be attributed to its larger ECSA and lower adsorption energy of the intermediate to facilitate the direct oxidation of HCOOH molecule.