Ethanol electrooxidation on high-performance mesoporous ZnFe<sub>2</sub>O<sub>4</sub>-supported palladium nanoparticles

Kaedi, Fariba; Yavari, Zahra; Asmaei, Milad; Abbasian, Ahmad Reza; Noroozifar, Meissam

doi:10.1039/c8nj05950k

Cited by 23 publications

(9 citation statements)

References 62 publications

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“…In addition, results from our previous work estimated the ECSA around 92 m 2 •g −1 for a loading of 50 wt %, which confirms the trend observed here of a higher ECSA estimated with higher Pd loading [21]. Nevertheless, these ECSA values remain in the higher range of reported values for monometallic Pd catalysts more typically in the range 10-60 m 2 •g −1 [21,[39][40][41][42][43][44][45].…”

Section: As-synthesised Pd Nanoparticlessupporting

confidence: 88%

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Toward Overcoming the Challenges in the Comparison of Different Pd Nanocatalysts: Case Study of the Ethanol Oxidation Reaction

2020

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Precious metal nanoparticles, in particular palladium nanomaterials, show excellent catalytic properties and are key in the development of energy systems. For instance, ethanol fuel cells are promising devices for sustainable energy conversion, where Pd-based catalysts are key catalysts for the related ethanol oxidation reaction (EOR). Pd is a limited resource; thus, a remaining challenge is the development of efficient and stable Pd-based catalysts. This calls for a deeper understanding of the Pd properties at the nanoscale. This knowledge can be gained in comparative studies of different Pd nanomaterials. However, such studies remain challenging to perform and interpret due to the lack of cross-studies using the same Pd nanomaterials as a reference. Here, as-prepared sub 3 nm diameter surfactant-free Pd nanoparticles supported on carbon are obtained by a simple approach. The as-prepared catalysts with Pd loading 10 and 30 wt % show higher activity and stability compared to commercially available counterparts for the EOR. Upon electrochemical testing, a significant size increase and loss of electrochemical active surface are observed for the as-prepared catalysts, whereas the commercial samples show an increase in the electrochemically active surface area and moderate size increase. This study shines light on the challenging comparison of different catalysts across the literature. Further advancement in Pd (electro)catalyst design will gain from including self-prepared catalysts. The simple synthesis detailed easily leads to suitable nanoparticles to be used as a reference for more systematic comparative studies of Pd catalysts across the literature.

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Section: As-synthesised Pd Nanoparticlessupporting

confidence: 88%

“…x FOR PEER REVIEW 4 of 16 in the higher range of reported values for monometallic Pd catalysts more typically in the range 10-60 m 2 •g −1[21,[39][40][41][42][43][44][45].…”

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confidence: 97%

Toward Overcoming the Challenges in the Comparison of Different Pd Nanocatalysts: Case Study of the Ethanol Oxidation Reaction

2020

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“…The cyclic voltammetry (CV) curve in the formaldehyde bath shows an anodic peak in the forward scan at 0.1 V versus the saturated calomel electrode (SCE), which is attributed to the oxidation of formaldehyde. The peak at −0.1 V in the backward scan originates from the oxidation of organic fragments, which is also documented in the electro-oxidation of other small organics . These peaks were not observed in the experiments in the blank bath.…”

Section: Resultsmentioning

confidence: 59%

“…The peak at −0.1 V in the backward scan originates from the oxidation of organic fragments, which is also documented in the electro-oxidation of other small organics. 37 These peaks were not observed in the experiments in the blank bath. In contrast, when the Cu/C catalyst was tested, neither of these anodic peaks were observed.…”

Section: Resultsmentioning

confidence: 89%

Assembling Palladium and Cuprous Oxide Nanoclusters into Single Quantum Dots for the Electrocatalytic Oxidation of Formaldehyde, Ethanol, and Glucose

Biemolt

Noordenne

Liu

et al. 2020

ACS Appl. Nano Mater.

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To effectively manipulate the electronic structure of the catalysts, we present here a simple bottom-up synthesis protocol for agglomerating palladium and cuprous oxide ultrasmall nanoclusters into single nanoparticles, forming so-called quantum dot assemblies (QDAs). Our synthesis is based on the galvanic displacement of copper with palladium cations under O2-free conditions, rendering the simultaneous and unique crystal growth of ∼3 nm Cu2O and Pd clusters. Such assemblies, comprising ultrasmall nanoconstitutes, offer much more phase boundaries, where the interfacial electronic effect becomes prominent in catalysis. This is demonstrated in the electrocatalytic oxidation of formaldehyde, ethanol, and glucose. In all three cases, the QDA catalyst, despite its similar Pd loading, outperforms the monometallic palladium catalyst. Indeed, complementing the experimental results with density functional theory calculations, we could confirm the sharply increased charge density at the Pd–Cu heterojunction and the decreased energy barrier of the formaldehyde oxidation on the QDA catalyst. Finally, we applied these catalysts in electroless copper deposition – an industrially relevant process for manufacturing printed circuit boards. The QDA catalysts gave uniform and robust copper wires at a rate that was three times faster than that of the monometallic Pd catalyst, showing their potential for real-life applications.

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“…(2) Herein, R is the gas constant, T is the absolute temperature, n is the number of electrons transferred (n = 1) and F is the Faraday constant [41]. According to this equation, the I 0 values calculated for bPGE, and NiO/ MWCNT/NNaM/PGE are 0.122 mA, and 2.617 mA, respectively indicating that modification was extremely increased catalytic activity.…”

Section: Electrochemical Performance Of Electrodesmentioning

confidence: 99%

Simultaneous Trace Electrochemical Determination of Xanthine Theophylline and Theobromine with a Novel Sensor Based on a Composite Including Metal Oxide Nanoparticle Multi‐walled Carbon Nanotube and Nano‐Na‐montmorillonite Clay

2021

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We report the simultaneous determination of purine molecules with biological significance on pencil graphite electrode (PGE) modified with a composite solution including NiO nanoparticles, multi-walled carbon nanotube (MWCNT), and natural nano-Na-montmorillonite clay (NNaM) using DPV technique. The novel sensor, NiO/MWCNT/NNaM/PGE, achieved simultane-ous determination of xanthine, theophylline, and theobromine at the detection limits 0.077 μM, 0.361 μM, and 0.458 μM with the linear working ranges 0.5-150 μM, 5-200 μM, and 5-250 μM in Britton-Robinson buffer at pH 2.0, respectively. The sensor revealed excellent performance for the simultaneous determination of XT, TP, and TB in three real-world samples.

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Ethanol electrooxidation on high-performance mesoporous ZnFe₂O₄-supported palladium nanoparticles

Abstract: As a catalyst for the electrooxidation of ethanol, a well-dispersed mesoporous ZnFe2O4 powder (ZnFe2O4MP) as a support for Pd nanoparticles (PdNPs) was fabricated using solution combustion synthesis, which is an easy and environmentally friendly method.

Cited by 23 publications

References 62 publications

Toward Overcoming the Challenges in the Comparison of Different Pd Nanocatalysts: Case Study of the Ethanol Oxidation Reaction

Toward Overcoming the Challenges in the Comparison of Different Pd Nanocatalysts: Case Study of the Ethanol Oxidation Reaction

Assembling Palladium and Cuprous Oxide Nanoclusters into Single Quantum Dots for the Electrocatalytic Oxidation of Formaldehyde, Ethanol, and Glucose

Simultaneous Trace Electrochemical Determination of Xanthine Theophylline and Theobromine with a Novel Sensor Based on a Composite Including Metal Oxide Nanoparticle Multi‐walled Carbon Nanotube and Nano‐Na‐montmorillonite Clay

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Ethanol electrooxidation on high-performance mesoporous ZnFe2O4-supported palladium nanoparticles

Abstract: As a catalyst for the electrooxidation of ethanol, a well-dispersed mesoporous ZnFe2O4 powder (ZnFe2O4MP) as a support for Pd nanoparticles (PdNPs) was fabricated using solution combustion synthesis, which is an easy and environmentally friendly method.

Cited by 23 publications

References 62 publications

Toward Overcoming the Challenges in the Comparison of Different Pd Nanocatalysts: Case Study of the Ethanol Oxidation Reaction

Toward Overcoming the Challenges in the Comparison of Different Pd Nanocatalysts: Case Study of the Ethanol Oxidation Reaction

Assembling Palladium and Cuprous Oxide Nanoclusters into Single Quantum Dots for the Electrocatalytic Oxidation of Formaldehyde, Ethanol, and Glucose

Simultaneous Trace Electrochemical Determination of Xanthine Theophylline and Theobromine with a Novel Sensor Based on a Composite Including Metal Oxide Nanoparticle Multi‐walled Carbon Nanotube and Nano‐Na‐montmorillonite Clay

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Ethanol electrooxidation on high-performance mesoporous ZnFe₂O₄-supported palladium nanoparticles