Effect of Co‐catalyst on the Selective Electrooxidation of Glycerol over Ruthenium‐based Nanomaterials

Abstract

Ruthenium‐based Pd and Pt nanoparticles were prepared by mild microwave‐assisted heating and were characterized by X‐ray diffraction and transmission electron microscopy. The activities of these catalysts during the oxidation of glycerol in alkaline media were studied by electrochemical, analytical, and in situ spectroscopy techniques. Changing the noble metal (Pd or Pt) allowed the selectivity of the catalysts to be tailored during the electrooxidation of glycerol. This introduces the possibility of utilizing the catalysts in cogeneration processes for renewable energy sources and also of employing the catalysts to produce value‐added molecules selectively. High‐performance liquid chromatography evidenced that the PtRu material had excellent catalytic activity in the selective oxidation of glycerol to dihydroxyacetone, whereas the PdRu anode favored the production of glycerate.

Bromide-Regulated Anisotropic Growth of Desert-Rose-Like Nanostructured Gold onto Carbon Fiber Electrodes as Freestanding Electrocatalysts

“…20, 28,[53][54][55][56][57][58] Except for few examples of nanoalloynanoporous AuAg 19 and Pt-PtCo, 53,57 it can, therefore, be deduced that the performance of the asfabricated GDE-Au freestanding material is superior to the relevant activities reported in the literature for gold-, palladium-, and platinum-based electrocatalysts. 20, [54][55][56][58][59][60][61][62] To our knowledge, this is the first time a free-standing electrocatalyst made of desert rose-like nanostructured gold has been obtained directly onto carbon fiber electrode and demonstrate high performance towards the glycerol electrooxidation. The enhanced electrocatalytic performance of the present GDE-Au results from the absence of organic impurities or binding substances on the surface of the nanostructured particles, the particular morphology of the latter, and the strong particle-support interaction.…”

Decorating Pt/C Nanoparticles with Ru by Wall‐Jet Configuration: The Role of Coverage Degree on the Catalyst Activity for Glycerol Electrooxidation

“…Glycerol is a surplus byproduct of biodiesel production, which requires application in order to avoid inadequate disposal and to increase its market price . The presence of three hydrated carbons in its chain makes this alcohol a possible fuel for fuel cells and potential substrate for electrolysis . However, challenges must be surpassed to allow high energy production and/or selective electrolysis, indicating a need for new catalysts.…”

“…Therefore, it is reasonable to hypothesize that the use of PtRu may improve the electrooxidation of adsorbed CO, which will lead to an enhanced GEOR, accordingly. However, even considering the long‐time‐application of PtRu material in electrocatalysis, few researches have addressed the use of PtRu‐based catalysts for GEOR .…”

“…Palma et al. showed that PtRu might lead GEOR towards dihydroxyacetone in alkaline medium . Garcia et al.…”

Enhanced Catalytic Glycerol Oxidation Activity Enabled by Activated‐Carbon‐Supported Palladium Catalysts Prepared through Atomic Layer Deposition

“…Table S1 (SI) presents a relevant comparison of carbon supported Pd catalysts performance for glycerol electrooxidation reaction in alkaline media. The results from the normalization by either the geometric surface area (Figure S6a) or ECSA of Pd (Figure S6b) show that the present ACF@Pd300 material outperforms most of the data reported for monometallic Pd ,,,,,,…”