%0 Journal Article
%A Shamraiz, Umair
%A Ahmad, Zeeshan
%A Raza, Bareera
%A Badshah, Amin
%A Ullah, Sajid
%A Nadeem, Muhammad Arif
%D 2020
%T CaO-Promoted
Graphene-Supported Palladium Nanocrystals
as a Universal Electrocatalyst for Direct Liquid Fuel Cells
%U https://acs.figshare.com/articles/journal_contribution/CaO-Promoted_Graphene-Supported_Palladium_Nanocrystals_as_a_Universal_Electrocatalyst_for_Direct_Liquid_Fuel_Cells/11608323
%R 10.1021/acsami.9b16151.s001
%2 https://ndownloader.figshare.com/files/21009594
%K powder X-ray diffraction
%K energy-dispersive X-ray spectroscopy
%K Direct Liquid Fuel Cells
%K CaO-Promoted Graphene-Supported Palladium Nanocrystals
%K alcohol fuel cells
%K ethanol
%K plasma mass spectrometry
%K formic acid oxidation
%K calcium oxide
%K NaBH 4 reduction method
%K graphene oxide-supported PdCa
%K scanning electron microscopy
%K catalyst
%K transmission electron microscopy
%K formic acid fuel cells
%K formic acid
%K CO
%K methanol
%K X-ray photoelectron spectroscopy
%X Here, we present
the fabrication of a reduced graphene oxide-supported
PdCa (PdCa/rGO) alloyed catalyst via a NaBH4 reduction
method for direct alcohol fuel cells in basic medium and direct formic
acid fuel cells in acidic medium. Powder X-ray diffraction, energy-dispersive
X-ray spectroscopy, scanning electron microscopy, transmission electron
microscopy, high-resolution transmission electron microscopy, X-ray
photoelectron spectroscopy, Brunauer–Emmett–Teller,
inductively coupled plasma mass spectrometry, and Raman spectroscopy
are used to characterize the PdCa/rGO catalyst. We proved that the
calcium oxide significantly enhances the electrocatalytic methanol,
ethanol, and formic acid oxidation over the Pd/rGO surface. The obtained
mass activities for PdCa/rGO are 4838.06, 4674.70, and 3906.49 mA
mg–1 for formic acid, methanol, and ethanol, respectively.
Long-term stability, high activity, and high level of tolerance to
CO poisoning of the PdCa/rGO electrocatalyst are attributed to the
presence of calcium oxide. These results prove that the PdCa/rGO catalyst
has improved electrocatalytic performance for the oxidation of formic
acid, methanol, and ethanol with reference to the Pd/rGO.
%I ACS Publications