Highly active Ag/C nanoparticles containing ultra-low quantities of sub-surface Pt for the electrooxidation of glycerol in alkaline media

Lima, Carlos; Rodrigues, Marta V. F.; Neto, Antonio Florentino; Zanata, Cinthia R.; Pires, Cléo T. G. V. M. T.; Costa, Luelc Souza da; Solla-Gullón, José; Fernández, Pablo S.

doi:10.1016/j.apcatb.2020.119369

Cited by 48 publications

(64 citation statements)

References 34 publications

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“…The identified reaction products by HPLC (Figures 8e and S23) are shown in Figure 8f in terms of the selectivity; all quantitative metrics are reported in Tables S6 and S7. Among the five products (to compare, up to nine products were reported 9 ), the main reaction products are glycolate, formate, and glycerol; lactate was not detected contrary to the recent report of Lima et al 8 Based on these findings (no carbonate from full C−C bond cleavage was detected), a scheme was proposed (Figure 8g). Given the high amount of formate (42%) at the commercial Pd/C, the carbon−carbon bond is easily broken at this catalyst than the as-synthesized material (18−21%).…”

Section: Electrocatalytic Performance Toward the Orrmentioning

confidence: 74%

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Fe-Modified Pd as an Effective Multifunctional Electrocatalyst for Catalytic Oxygen Reduction and Glycerol Oxidation Reactions in Alkaline Media

Cassani

Tuleushova

Wang

et al. 2021

ACS Appl. Energy Mater.

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The development of high-performance catalytic nanomaterials is important to implement sustainable and electrochemical energy devices of alkaline fuel cells, metal−air batteries, and electrolyzers in the envisaged energy-transition scenarios. Synthesizing effective nanocatalysts as both anode materials for oxidation of glycerol (byproduct of the biodiesel industry) and cathode materials for the oxygen reduction reaction (ORR) is still a bottleneck. Herein, we report palladium-based nanomaterials whose physicochemical and electrochemical properties are tuned by the judicious choice of the support (rGO, Vulcan XC72R), the addition of a coelement (Fe), and the structure (alloy/core−shell). The bimetallic-based electrode shows a drastically enhanced electrocatalytic performance with a beneficial shifting of the onset potential, production of high currents, and good durability for both the ORR (kinetic current density j k = 2 mA cm Pd −2 or 1 A mg Pd −1) and glycerol oxidation (j p = 2.3 mA cm Pd −2 or 1.11 A mg Pd −1 at the peak), higher than those of commercial catalysts and existing literature values. The present results also provide new fundamental insights about the accurate measurement of the kinetic metrics of the ORR by employing a rotating-disk (-ring) electrode setup in alkaline electrolytes with metallic catalysts. Indeed, the anodic scanning of the electrode from a low potential to a higher one results in an ultrafast electrochemical kinetics with a positive shift of the half-wave potential of ΔE 1/2,anodic/cathodic = 60 mV from the cathodic direction to the anodic one. The kinetic current density dramatically increases, j k,anodic = 19.0×, 6.9×, 3.4×, and 2.4× j k,cathodic at 950, 900, 870, and 850 mV RHE , respectively. The advantage of the synthesis methodology relies on the nonuse of organic molecules as capping agents and surfactants in order to produce bare (ligand-free) bimetallic PdFe electrocatalysts with a clean catalytic surface in a facile and straightforward way.

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Section: Electrocatalytic Performance Toward the Orrmentioning

confidence: 74%

“…) and where the metal loading can be very high, that is, it reaches 500 μg metal cm −2 . 6,[8][9][10][11][12]45 Furthermore, at 1 M glycerol (Figures 5h and S8b,c), the achieved j p = 4 mA cm Pd −2 (2 A mg Pd −1 and 59 mA cm geo −2…”

Section: Resultsmentioning

confidence: 99%

Fe-Modified Pd as an Effective Multifunctional Electrocatalyst for Catalytic Oxygen Reduction and Glycerol Oxidation Reactions in Alkaline Media

Cassani

Tuleushova

Wang

et al. 2021

ACS Appl. Energy Mater.

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Section: Characterization and Properties Of Copt Go Rgo Rgo/copt And Rgo/copt/agmentioning

confidence: 85%

“…Figure4eshows the spectra of Pt4f, and the two peaks at 71.6 and 74.8 eV correspond to Pt4f 7/2 and Pt4f 5/2 , respectively. Figure4fshows that the peaks at 367.8 and 373.8 eV in the Ag3d spectrum accord with Ag3d 5/2 and Ag3d 3/2 , respectively[46].High-angle annular dark-field scanning TEM (HAADF-STEM) and EDS mapping were applied to study the elemental distribution of rGO/CoPt/Ag. The results are shown in Figure5a-e: C, Ag, Co, and Pt elements are evenly distributed in the sample, proving the formation of rGO/CoPt/Ag.…”

mentioning

confidence: 96%

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

et al. 2021

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Composite nanostructure materials are widely used in catalysis. They exhibit several characteristics, such as the unique structural advantage and the synergism among their components, which significantly enhances their catalytic performance. In this work, CoPt nanoparticles and reduced-graphene-oxide-based nanocomposite catalysts (rGO/CoPt, rGO/CoPt/Ag) were prepared by using a facile co-reduction strategy. The crystalline structure, morphology, composition, and optical characteristics of the CoPt nanoparticles, rGO/CoPt nanocomposite, and rGO/CoPt/Ag nanocomposite catalysts were investigated by a set of techniques. The ID/IG value of the rGO/CoPt/Ag nanocomposite is 1.158, higher than that of rGO/CoPt (1.042). The kinetic apparent rate constant, k, of the rGO/CoPt/Ag nanocomposite against 4-nitrophenol (4-NP) reduction is 5.306 min−1, which is higher than that of CoPt (0.495 min−1) and rGO/CoPt (1.283 min−1). The normalized rate constant, knor, of the rGO/CoPt/Ag nanocomposite is 56.76 min−1mg−1, which is higher than some other catalytic materials. The rGO/CoPt/Ag nanocomposite shows a significantly enhanced catalytic performance when compared to CoPt nanoparticles and the rGO/CoPt nanocomposite, which may confirm that the novel rGO/CoPt/Ag nanocomposite is a promising catalyst for the application of catalytic fields.

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“…Experimental results obtained from in situ FTIR, electrolysis, and HPLC analysis showed that both Pt(1%)Ag/C and Pt/C could electrochemically convert glycerol to C 3 , C 2, and C 1 products, but Pt/C produced more carbonate and was more easy to be poisoned by these intermediates from breaking CC owing to its stronger ability to break CC bonds. [ 43 ]…”

Section: Electrocatalystsmentioning

confidence: 99%

Recent Progress in Electrocatalytic Glycerol Oxidation

et al. 2020

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Glycerol, as the major by‐product of biodiesel, can be oxidized into diverse value‐added chemical products via either traditional chemical methods or electrochemical routes. Electrocatalytic glycerol oxidation reaction (GOR) driven by renewable‐derived electricity (e.g., wind and solar) is a promising pathway for fine chemicals production. In an electrochemical cell, GOR can be coupled with various cathodic reactions, including hydrogen evolution reaction (HER), CO2 reduction reaction (CO2RR), and oxygen reduction reaction (ORR); in this manner, different benefits of either energy effectiveness or additional value‐added products can be obtained depending on the cathode reduction reaction selected. Comprehensively understanding of electrocatalytic GOR and the associated processes is of great significance to promote its industrial application. Herein, recent progress of GOR is focused on. The background of biomass‐derived glycerol valorization to energy and value‐added chemicals as well as the electrochemical conversion techniques via GOR is introduced. Then, the electrocatalytic reaction pathways, the potential application of GOR, and the measurement method for products are also discussed and summarized. Special emphasis is put on the design and the development of high‐selectivity and high‐activity electrocatalysts for GOR. Finally, the challenges and the future prospects in the fields of GOR are highlighted.

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Highly active Ag/C nanoparticles containing ultra-low quantities of sub-surface Pt for the electrooxidation of glycerol in alkaline media

Cited by 48 publications

References 34 publications

Fe-Modified Pd as an Effective Multifunctional Electrocatalyst for Catalytic Oxygen Reduction and Glycerol Oxidation Reactions in Alkaline Media

Fe-Modified Pd as an Effective Multifunctional Electrocatalyst for Catalytic Oxygen Reduction and Glycerol Oxidation Reactions in Alkaline Media

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

Recent Progress in Electrocatalytic Glycerol Oxidation

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