Gold Bull

Energies

The commonly used electrode Pt supported on a carbon (Pt/C) catalyst has demonstrated underperforming electrochemical durability in proton exchange membrane fuel cell (PEMFC) harsh operation conditions, especially in terms of Pt electrochemical instability and carbon corrosion. Gold nanoparticles (AuNPs) are considered one of the best alternative catalysts of PtNPs due to their remarkable selectivity for oxygen reduction reaction (ORR) and electrochemical stability in strong acid conditions, attributes which are ideal for practical PEMFC applications. In this work, we propose a new, facile and low-cost approach to prepare AuNPs supported on reduced graphene oxide nanocompounds (AuNPs/rGO). The morphological and structural properties of the as-prepared AuNPs/rGO were studied using various microscopic and spectroscopic techniques, namely, Raman Spectroscopy, Scanning Electron Microscopy (SEM), Scanning Transmission Electron Microscopy (STEM), X-Ray Diffraction (XRD), Fourier Transform...

Electrochimica Acta, 2013

J. Mater. Chem. A, 2015

Electrochemical reduction of carbon dioxide is one of the methods which have the capability to recycle CO 2 into valuable products for energy and industrial applications. This research article describes about a new electrocatalyst Breduced graphene oxide supported gold nanoparticles^ for selective electro-chemical conversion of carbon dioxide to carbon monoxide. The main aim for conversion of CO 2 to CO lies in the fact that the latter is an important component of syn gas (a mixture of hydrogen and carbon monoxide), which is then converted into liquid fuel via well-known industrial process called Fischer-Tropsch process. In this work, we have synthesized different composites of the gold nanoparticles supported on defective reduced graphene oxide to evaluate the catalytic activity of reduced graphene oxide (RGO)-supported gold nano-particles and the role of defective RGO support towards the electrochemical reduction of CO 2. Electrochemical and impedance measurements demonstrate that higher concentration of gold nanoparticles on the graphene support led to remarkable decrease in the onset potential of 240 mV and increase in the current density for CO 2 reduction. Lower impedance and Tafel slope values also clearly support our findings for the better performance of RGOAu than bare Au for CO 2 reduction.

Journal of Molecular Catalysis A: Chemical, 2016

Materials Sciences and Applications, 2013

Molecules, 2022

Journal of Materials Chemistry, 2009

Applied Surface Science, 2019

Arabian Journal of Chemistry, 2018