Facile synthesis of PdAg nanocatalysts on CeO<sub>2</sub>/C composite supports as high-performance catalysts toward alkaline ethanol electro-oxidation

Xie, Ayong; Zhang, Qing; He, Huiqing; Peng, Cheng

doi:10.1039/d0nj03757e

Cited by 8 publications

(2 citation statements)

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“…B-R buffer at pH 7 containing v/v ethanol was subjected to square wave voltammetric analysis in the absence of CHL to obtain any background signals that might affect the CHL sensing. It can be noted that the presence of ethanol in the electrolyte only produces signals at much higher concentrations (40 % v/v) at different potentials (À 0.2 V and À 0.7 V vs. Ag/AgCl) than that of CHL [46,47]. Hence, it doesn't interfere with the response of CHL (Figure 5a).…”

Section: Electrochemical Sensing Of Chlmentioning

confidence: 99%

Carbon Dots Derived from Waste Psidium Guajava Leaves for Electrocatalytic Sensing of Chlorpyrifos

2022

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Carbon dots (CDs) modified GCE was used for the electrochemical sensing of Chlorpyrifos (CHL). The hydrothermal synthesis (200 °C for 10 h) produced CDs of 3.7 nm using Psidium guajava leaves. Square wave voltammetry was employed for the determination of CHL and the electrokinetic parameters. The reduction of CHL involved an irreversible two‐electron process with heterogeneous reaction rate (k°) and formal potential (E°) of 1.21 s−1 and −1.34 V respectively. The modified GCEs exhibited good repeatability (RSD 4.7 %), reproducibility (RSD 1.17 %), and sensitivity (1.30 mA μM−1 cm−2). The detection limit and linear ranges were 1.5 nM and 0.01–1 μM, respectively. Electrochemical sensing of CHL was comparable with the HPLC (∼5 % variation).

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Section: Electrochemical Sensing Of Chlmentioning

confidence: 99%

Carbon Dots Derived from Waste Psidium Guajava Leaves for Electrocatalytic Sensing of Chlorpyrifos

2022

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“…The results displayed an enhancement of EEO activity with a smaller onset potential and a higher EEO maximum current density. In alkaline medium, several studies have also demonstrated the ability of rare-earth metals to promote Pt, Pd, or Ni EEO activity by the electronic (further boosted by the oxygen vacancies present in some REO) and bifunctional effects [14][15][16][17][18][19][20][21], extending the promotional effect of the REO to the whole range of pH.…”

Section: Introductionmentioning

confidence: 99%

The Promotional Effect of Rare Earth on Pt for Ethanol Electro-Oxidation and Its Application on DEFC

et al. 2023

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Bimetallic Pt3Eu/C, Pt3La/C, and Pt3Ce/C electrocatalysts have been prepared, characterized, and tested for ethanol electro-oxidation (EEO). The materials were synthesized by chemical reduction with NaBH4, rendering nanosized particles with actual compositions close to the nominals and no alloy formation. X-ray photoelectron spectroscopy (XPS) confirmed that the auxiliary rare-earth metals were present on the surface in oxide form. The electrochemical analyses in acid and alkaline EEO evidenced that, compared to Pt/C, the addition of rare earth metals in the form of oxides reduced the onset potential, increased the current density, and enhanced the stability. The results were fully confirmed in the DEFC single-cell measurements. Finally, the presence of rare earth metals in the oxidized form increased the percentage of acetic acid as the final product, making the electrocatalysts more selective and efficient than Pt/C, where acetaldehyde was the main product.

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Rational Design and Facile Preparation of Palladium‐Based Electrocatalysts for Small Molecules Oxidation

Wu,

Zhang,

Yang

2024

ChemSusChem

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Direct liquid fuel cells (DLFCs) can convert the chemical energy of small organic molecules directly into electrical energy, which is a promising technique and always calls for electrocatalysts with high activity, stability and selectivity. Palladium (Pd)‐based catalysts for DLFCs have been widely studied with the pursuit of ultra‐high performance, however, most of the preparation routes require complex agents, multi‐operation steps, even extreme experimental conditions, which are high‐cost, energy‐consuming, and not conducive to the scalable and sustainable production of catalysts. In this review, the recent progresses on not only the rational design strategies, but also the facile preparation methods of Pd‐based electrocatalysts for small molecules oxidation reaction (SMOR) are comprehensively summarized. Based on the principles of green chemistry in material synthesis, the basic rules of “facile method” have been restricted, and the fabrication processes, perks and drawbacks, as well as practical applications of the “real” facile methods have been highlighted. The landscape of this review is to facilitate the mild preparation of efficient Pd‐based electrocatalysts for SMOR, that is, to achieve a balance between “facile preparation” and “outstanding performance”, thereby to stimulate the huge potential of sustainable nano‐electrocatalysts in various research and industrial fields.

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Facile synthesis of PdAg nanocatalysts on CeO₂/C composite supports as high-performance catalysts toward alkaline ethanol electro-oxidation

Abstract: Direct alkaline ethanol fuel cells (DAEFCs) has attracted great interest as one of the most promising portable energy systems. In this work, we report a novel and facile method to...

Cited by 8 publications

References 51 publications

Carbon Dots Derived from Waste Psidium Guajava Leaves for Electrocatalytic Sensing of Chlorpyrifos

Carbon Dots Derived from Waste Psidium Guajava Leaves for Electrocatalytic Sensing of Chlorpyrifos

The Promotional Effect of Rare Earth on Pt for Ethanol Electro-Oxidation and Its Application on DEFC

Rational Design and Facile Preparation of Palladium‐Based Electrocatalysts for Small Molecules Oxidation

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Facile synthesis of PdAg nanocatalysts on CeO2/C composite supports as high-performance catalysts toward alkaline ethanol electro-oxidation

Abstract: Direct alkaline ethanol fuel cells (DAEFCs) has attracted great interest as one of the most promising portable energy systems. In this work, we report a novel and facile method to...

Cited by 8 publications

References 51 publications

Carbon Dots Derived from Waste Psidium Guajava Leaves for Electrocatalytic Sensing of Chlorpyrifos

Carbon Dots Derived from Waste Psidium Guajava Leaves for Electrocatalytic Sensing of Chlorpyrifos

The Promotional Effect of Rare Earth on Pt for Ethanol Electro-Oxidation and Its Application on DEFC

Rational Design and Facile Preparation of Palladium‐Based Electrocatalysts for Small Molecules Oxidation

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Facile synthesis of PdAg nanocatalysts on CeO₂/C composite supports as high-performance catalysts toward alkaline ethanol electro-oxidation