Rod-like MnO2 boost Pd/reduced graphene oxide nanocatalyst for ethylene glycol electrooxidation

PdPbAg alloy NPs immobilized on reduced graphene oxide/In2O3 composites as highly active electrocatalysts for direct ethylene glycol fuel cells

“…4(E) is the XPS spectrum of C 1 s, two peaks can be seen in the figure, the prominent peak at 285.1 eV belongs to the C–C bond of rGO, and the other peak at 289.1 eV corresponds to the O–C O functional group of rGO. 38 It can be found that the peaks of oxygen-containing functional groups are particularly small, indicating that GO is reduced to rGO in the electrocatalyst. Fig.…”

Manganese Oxides (Mn3O4 & α‐MnO2) as Co‐catalysts in Pd‐Based Nanomaterials for the Ethylene Glycol Electro‐Oxidation.

“…After these evaluations, 10 wt.% of Vulcan carbon was added to the Pd/α-MnO 2 and Pd/Mn 3 O 4 materials to obtain carbon-assisted electrocatalysts due to the poor electrical conductivity of MnO x . [15,16] The electrochemical characterization and electrocatalytic evaluation were similar to that before mentioned. After the EG and KOH evaluation, the temperature effect was analyzed to determine the activity improvement with the raise of temperature, and to calculate the apparent activation energies (E a, app ) [30] to stablish the effect of MnO x on the activity.…”

“…Ethylene glycol (≥99.9 %, Merk) and potassium hydroxide (≥85 %, Sigma‐Aldrich) electrolytic solutions were varied from 0.1 M EG to 2 M EG (maintaining 0.3 M KOH), and from 0.1 to 1 M KOH (maintaining 2 M EG), respectively. After these evaluations, 10 wt.% of Vulcan carbon was added to the Pd/α‐MnO 2 and Pd/Mn 3 O 4 materials to obtain carbon‐assisted electrocatalysts due to the poor electrical conductivity of MnO x [15,16] . The electrochemical characterization and electrocatalytic evaluation were similar to that before mentioned.…”

“…Additionally, the Mn 3+ /Mn 4+ redox couple provide acid centers (acting as strong Lewis's acid centers) promoting the dehydrogenation of the alcohol molecule to be further oxidized [14a] . In the case of the spinel (Mn 3 O 4 ), apart from the presence of mixed oxidation states, the presence of manganese in form of hydroxides has also an impact on the activity in alkaline media because a bifunctional mechanism take place, [15] where manganese hydroxides allow the adsorption of OH − at lower potentials, [16] being OH − required for the alcohol oxidation to CO 2 [17] . Additionally, the Mn 3 O 4 material can provide an appropriate base for the formation of small‐size noble metal nanoparticles like Pt [18] …”

Preparation of Reduced-Graphene-Oxide-Supported CoPt and Ag Nanoparticles for the Catalytic Reduction of 4-Nitrophenol

“…This material consists of a hydrophilic surface and has triggered the attention of several scientists since it can be employed as a catalytic support due to its excellent adsorption properties, its good chemical stability, etc. [25][26][27].…”