10.1021/acsami.7b01874.s001
Hucheng Zhang
Hucheng
Zhang
Yingying Shang
Yingying
Shang
Jing Zhao
Jing
Zhao
Jianji Wang
Jianji
Wang
Enhanced
Electrocatalytic Activity of Ethanol Oxidation Reaction on Palladium–Silver
Nanoparticles via Removable Surface Ligands
American Chemical Society
2017
surface area
BH
EOR
anodic catalyst
alloying degree
ethanol fuel cells
Pd x Ag y NPs
charge transfer
OH
Removable Surface Ligands
Pd x Ag y nanoparticles
amimRG nanocomposite exhibits
4.7 nm
energy barrier
C n mim
oxidation potentials
reaction intermediates
Ethanol Oxidation Reaction
interface-modified RG nanosheets
ethanol oxidation reaction
Enhanced Electrocatalytic Activity
poison resistance
2017-04-26 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Enhanced_Electrocatalytic_Activity_of_Ethanol_Oxidation_Reaction_on_Palladium_Silver_Nanoparticles_via_Removable_Surface_Ligands/4961498
This
work developed a facile colloidal route to synthesize BH<sub>4</sub><sup>–</sup>-capped Pd<sub><i>x</i></sub>Ag<sub><i>y</i></sub> nanoparticles (NPs) in water using the reducing
ionic liquids of [C<sub><i>n</i></sub>mim]BH<sub>4</sub>, and the resulting NPs were prone to form the nanocomposites with
[amim]<sup>+</sup>-modified reduced graphene (RG). The removal of
the metal-free inorganic ions of BH<sub>4</sub><sup>–</sup> can create the profoundly exposed interfaces on the Pd<sub><i>x</i></sub>Ag<sub><i>y</i></sub> NPs during the electrooxidation,
and favor the ethanol oxidation reaction (EOR) in lowering energy
barrier. The counterions of [C<sub><i>n</i></sub>mim]<sup>+</sup> can gather ethanol, OH<sup>–</sup> ions, and the reaction
intermediates on catalysts, and synergistically interact with RG to
facilitate the charge transfer in nanocomposites. The interface-modified
RG nanosheets can effectively segregate the Pd<sub><i>x</i></sub>Ag<sub><i>y</i></sub> NPs from aggregation during
the EOR. Along with the small size of 4.7 nm, the high alloying degree
of 60.2%, the large electrochemical active surface area of 64.1 m<sup>2</sup> g<sup>–1</sup>, and the great peak current density
of 1501 mA cm<sup>–2</sup> mg<sup>–1</sup>, Pd<sub>1</sub>Ag<sub>2</sub>@[C<sub>2</sub>mim]BH<sub>4</sub>-amimRG nanocomposite
exhibits the low oxidation potentials, strong poison resistance, and
stable catalytic activity for EOR in alkaline media, and hence can
be employed as a promising anodic catalyst in ethanol fuel cells.