Catalytic enhancement of formic acid electro-oxidation through surface modifications with gold on supported Pt nanoparticles

Cappellari, Paula S.; Baena-Moncada, Angélica M.; Coneo-Rodríguez, Rusbel; Moreno, M. Sergio; Barbero, C.; Planes, Gabriel A.

doi:10.1016/j.ijhydene.2018.11.138

Cited by 13 publications

(8 citation statements)

References 30 publications

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“…Therefore, the results obtained in this work reveal that a well-developed pore structure (combination of macro-mesopores) promotes the catalyst dispersion, improving its electrochemical performance in the ORR process. This effect has been observed in our previous works where HPCs have been used to support NP of PtRu, PtPd, PtFe, and PtAu for applications in FC. ,− …”

Section: Resultssupporting

confidence: 68%

Hierarchical Porous Carbon-PtPd Catalysts and Their Activity toward Oxygen Reduction Reaction

et al. 2022

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PtPd bimetallic catalysts supported on hierarchical porous carbon (HPC) with different porous sizes were developed for the oxygen reduction reaction (ORR) toward fuel cell applications. The HPC pore size was controlled by using SiO 2 nanoparticles as a template with different sizes, 287, 371, and 425 nm, to obtain three HPC materials denoted as HPC-1, HPC-2, and HPC-3, respectively. PtPd/HPC catalysts were characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and high-resolution transmission electron microscopy. The electrochemical performance was examined by cyclic voltammetry and linear sweep voltammetry. PtPd/HPC-2 turned out to be the most optimal catalyst with an electroactive surface area (ESA) of 40.2 m 2 g –1 and a current density for ORR of −1285 A g –1 at 2 mV s –1 and 1600 rpm. In addition, we conducted a density functional theory computational study to examine the interactions between a PtPd cluster and a graphitic domain of HPC, as well as the interaction between the catalyst and the oxygen molecule. These results reveal the strong influence of the porous size (in HPC) and ESA values (in PtPd nanoparticles) in the mass transport process which rules the electrochemical performance.

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Section: Resultssupporting

confidence: 68%

Hierarchical Porous Carbon-PtPd Catalysts and Their Activity toward Oxygen Reduction Reaction

et al. 2022

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“…Recently, Rusbel et al. studied the formic acid electro‐oxidation over (Pt−Au) catalyst. Their work revealed that the presence of Au atoms on Pt improve the catalytic performance mainly shielding the active site poisoning of Pt.…”

Section: Introductionmentioning

confidence: 92%

Pd/CNT Catalysts for Glycerol Electro‐oxidation: Effect of Pd Loading on Production of Valuable Chemical Products

et al. 2020

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Glycerol (C3H8O3), a waste product of biodiesel, is considered as a suitable substrate for electro‐oxidation process to generate high value‐added products. A suitable active catalyst could improve the yield of desirable organic compounds from electro‐oxidation of glycerol. In this work, palladium nanoparticles supported over activated multi‐walled carbon nanotubes (MWCNTs) with varying loadings of 5 %–40 % were prepared using chemical reduction method and used to study their potential for electro‐oxidation of glycerol to produce various high value‐added products. The catalysts were characterized by different physicochemical methods, such as X‐ray diffraction (XRD), N2 adsorption‐desorption, and Transmission electron microscopy (TEM), whereas the electro‐oxidation activity of the catalysts was analysed using cyclic voltammetry (CV) and chronoamperometry (CA), and the products were identified by high performance liquid chromatography (HPLC). The electrochemical surface area (SESA) and mass activity (MA) were increased from 176.98 m2 g−1 to 282.29 m2 g−1 and 12.22 mA mg−1 to 49.53 mA mg−1 by increasing the Pd‐loading from 5 % to 20 %, respectively. While the further increase to 40 % Pd loading, the SESA and MA values decreased to 231.45 m2 g−1 and 47.63 mA mg−1respectively. The results found that the optimum 20 % Pd‐loading showed the excellent electrochemical properties due to uniform distribution of Pd‐metal particles over MWCNTs. High performance liquid chromatography (HPLC) showed the tartronic acid, glyceric acid and glyceraldehyde as dominant products. Mechanism of the reaction has also been proposed based on product distribution.

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“…The improvement is attributed to the [45] (Reproduced with permission from reference 45, Royal Chemical Society 2022) easy mass transfer in the porous support and facilitation of dehydrogenation pathway over PtAu NPs. [97] Fan et al synthesized high-loading (approximately 40-30 wt.%) PtAu catalysts on carbon black by ultrasound-assisted reduction without having to employ a surfactant. The synthesis is presented in Figure 6A.…”

Section: Goldmentioning

confidence: 99%

Recent Advances in Anode Electrocatalysts for Direct Formic Acid Fuel Cell‐II‐Platinum‐Based Catalysts

Hossain

Alwi

Saleem

et al. 2022

The Chemical Record

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Platinum-based catalysts have a long history of application in formic acid oxidation (FAO). The single metal Pt is active in FAO but expensive, scarce, and rapidly deactivates. Understanding the mechanism of FAO over Pt important for the rational design of catalysts. Pt nanomaterials rapidly deactivate because of the CO poisoning of Pt active sites via the dehydration pathway. Alloying with another transition metal improves the performance of Ptbased catalysts through bifunctional, ensemble, and steric effects. Supporting Pt catalysts on a high-surface-area support material is another technique to improve their overall catalytic activity. This review summarizes recent findings on the mechanism of FAO over Pt and Pt-based alloy catalysts. It also summarizes and analyzes binary and ternary Pt-based catalysts to understand their catalytic activity and structure relationship.

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Catalytic enhancement of formic acid electro-oxidation through surface modifications with gold on supported Pt nanoparticles

Cited by 13 publications

References 30 publications

Hierarchical Porous Carbon-PtPd Catalysts and Their Activity toward Oxygen Reduction Reaction

Hierarchical Porous Carbon-PtPd Catalysts and Their Activity toward Oxygen Reduction Reaction

Pd/CNT Catalysts for Glycerol Electro‐oxidation: Effect of Pd Loading on Production of Valuable Chemical Products

Recent Advances in Anode Electrocatalysts for Direct Formic Acid Fuel Cell‐II‐Platinum‐Based Catalysts

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