Compressive strain induced by multiple phase distribution and atomic ordering in PdCu nanoparticles to enhanced ethanol oxidation reaction performance

Ashly, P.C.; Sarkar, Shreya; Sarma, Saurav Ch.; Kaur, Komalpreet; Gautam, Ujjal K.; Peter, Sebastian C.

doi:10.1016/j.jpowsour.2021.230168

Cited by 10 publications

(2 citation statements)

References 35 publications

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“…Table 2 compares the performance of Fe/Pd-Fe bimetallic catalysts with the alkaline ethanol oxidation catalysts reported in the literature [31][32][33][34][35][36]. As shown in Table 2, although the ethanol concentration (0.05 M) in our used electrolyte is lower than those in the literature, the peak current density is comparable to these catalysts.…”

Section: Tablementioning

confidence: 78%

Alkaline ethanol oxidation on porous Fe/Pd–Fe nanostructured bimetallic electrodes

Abdolmaleki¹,

Hosseini

Allahgholipour³

et al. 2023

J Appl Electrochem

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In this work, to prepare nanostructured and porous Fe/Pd-Fe bimetallic catalysts, the iron coating is applied rstly onto the copper substrate by the electrochemical deposition method. Subsequently, iron-zinc alloy coating is deposited on the underlayer iron.Eventually, by immersing this alloy coating in an alkaline solution containing palladium ions, the palladium will replace the zinc, resulting in porous Fe/Pd-Fe catalysts.The X-ray diffraction (XRD) technique was used for the characterization of the physical properties of the as-prepared electrocatalysts. Their electrocatalytic activity was studied by electrochemical methods such as cyclic voltammetry (CV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS). The XRD results showed that the zinc element was the main component of the Fe/Zn-Fe alloy and was replaced by palladium as a result of leaching-galvanic replacement. The electrochemical investigations showed that a new porous Fe/Pd-Fe bimetallic catalyst had higher electro-catalytic activity and stability than pure Pd and Fe electrodes for ethanol electro-oxidation in alkaline media. The superiority of the Fe/Pd-Fe catalyst is related to the high surface area and a synergistic effect between Fe and Pd in Fe/Pd-Fe catalysts. Therefore, the nanostructured Fe/Pd-Fe catalysts can be proposed as potential anode materials for alkaline ethanol fuel cells.

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Section: Tablementioning

confidence: 78%

Alkaline ethanol oxidation on porous Fe/Pd–Fe nanostructured bimetallic electrodes

Abdolmaleki¹,

Hosseini

Allahgholipour³

et al. 2023

J Appl Electrochem

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“…In this strategy metal atoms are incorporated into the lattice of the solvent metal atom without changing the crystal structure of the solvent metal (figure 4(a)). Hence, alloys [67,68] can influence the activity and selectivity of the catalysts (figure 4(b)) by: change in the electronic structure, altering binding geometries for intermediates, creating mechanical strain at the catalyst surface [69][70][71][72]. Lattice parameter mismatch between the alloy components can lead to generation of mechanical strain which modulates the electronic structure.…”

Section: Alloyingmentioning

confidence: 99%

Catalyst designing strategies for electrochemical CO₂ reduction: a perspective

Sarkar

Peter

2022

Prog. Energy

Self Cite

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Electrochemical CO2 reduction (eCO2R) is one of the most promising and effective technologies to reduce CO2 into value-added chemicals and fuels, reducing the dependence on fossil fuels. However, the efficiency and selectivity of eCO2R is dependent on the interactions between the catalyst surface and the intermediates, which is majorly due to the inherent nature of the catalyst and other parameters like mass transport, electrolyte and intermediate coverage on the surface. There exists a parity between the existing experimental and theoretical catalyst design strategies. In this review we intend to discuss the rational design of catalysts based on transition metals to achieve highly efficient eCO2R. The strategies focused on here include the ligand effect, alloying, strain engineering, heterostructure formation, oxide derivation and the use of transition-metal chalcogenides, phosphides, nitrides and carbides. These strategies are effective in modulating the electronic structure, adsorption geometries and the local environment of the catalysts thus enhancing the eCO2R performance. In conclusion, the shortcomings and pivotal requirements in this field have been discussed in this perspective.

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In Situ Metal Vacancy Filling in Stable Pd‐Sn Intermetallic Catalyst for Enhanced CC Bond Cleavage in Ethanol Oxidation

Chandran,

Mondal,

Goud

et al. 2024

Advanced Materials

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A common challenge in electrochemical processes is developing high performance, stable catalysts for specific chemical reactions. In this work, a Pd‐Sn intermetallic compound with Pd site deficiency (Pd1.9−xSn) (x = 0.06) and trace amount of SnOx was synthesised by controlled process. Under the electrochemical conditions, the deficient Pd site is filled by metallic Sn, which generates a highly active and stable (Pd1.84Sn0.06)Sn catalyst for ethanol oxidation reaction (EOR). The crystal structure and atomic arrangements for synthesized and in situ generated compound are comprehensively characterized by various spectroscopic techniques. The in situ generated catalyst exhibits excellent performance toward EOR (anodic reaction in fuel cell), which outperforms the state‐of‐the‐art Pd/C catalyst by three times in terms of activity. Furthermore, it is observed that the catalyst preferentially cleaves the CC bond in ethanol, which is a crucial process that enhances the efficiency of the fuel cells. The catalyst retains its superlative activity even after 1500 cycles of continuous operation. The mechanism for EOR and CC bond cleavage is evidenced by operando Infra Red spectroscopy and Differential Electrochemical Mass Spectroscopy (DEMS), and the driving force toward excellent performance has been proposed via theoretical calculations.

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Compressive strain induced by multiple phase distribution and atomic ordering in PdCu nanoparticles to enhanced ethanol oxidation reaction performance

Cited by 10 publications

References 35 publications

Alkaline ethanol oxidation on porous Fe/Pd–Fe nanostructured bimetallic electrodes

Alkaline ethanol oxidation on porous Fe/Pd–Fe nanostructured bimetallic electrodes

Catalyst designing strategies for electrochemical CO₂ reduction: a perspective

In Situ Metal Vacancy Filling in Stable Pd‐Sn Intermetallic Catalyst for Enhanced CC Bond Cleavage in Ethanol Oxidation

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Compressive strain induced by multiple phase distribution and atomic ordering in PdCu nanoparticles to enhanced ethanol oxidation reaction performance

Cited by 10 publications

References 35 publications

Alkaline ethanol oxidation on porous Fe/Pd–Fe nanostructured bimetallic electrodes

Alkaline ethanol oxidation on porous Fe/Pd–Fe nanostructured bimetallic electrodes

Catalyst designing strategies for electrochemical CO2 reduction: a perspective

In Situ Metal Vacancy Filling in Stable Pd‐Sn Intermetallic Catalyst for Enhanced CC Bond Cleavage in Ethanol Oxidation

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Catalyst designing strategies for electrochemical CO₂ reduction: a perspective