Carbon supported Pd–Cu nanoalloys: support and valence band structure influence on reduction and oxidation reactions

Castegnaro, Marcus V.; Gorgeski, Andreia; Alves, Maria do Carmo Martins; Morais, Jonder

doi:10.1039/d1na00537e

Nanoscale Adv.

2021

DOI: 10.1039/d1na00537e

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Carbon supported Pd–Cu nanoalloys: support and valence band structure influence on reduction and oxidation reactions

Marcus V. Castegnaro

Andreia Gorgeski

Maria do Carmo Martins Alves

et al.

Abstract: The present study has tracked the changes in the electronic and structural properties of Pd–Cu nanoalloys that were influenced by the composition and chosen support.

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Contrasting Capability of Single Atom Palladium for Thermocatalytic versus Electrocatalytic Nitrate Reduction Reaction

Nazemi

Gupta

et al. 2023

ACS Catal.

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The occurrence of high concentrations of nitrate in various water resources is a significant environmental and human health threat, demanding effective removal technologies. Single atom alloys (SAAs) have emerged as a promising bimetallic material architecture in various thermocatalytic and electrocatalytic schemes including nitrate reduction reaction (NRR). This study suggests that there exists a stark contrast between thermocatalytic (T-NRR) and electrocatalytic (E-NRR) pathways that resulted in dramatic differences in SAA performances. Among Pd/Cu nanoalloys with varying Pd–Cu ratios from 1:100 to 100:1, Pd/Cu(1:100) SAA exhibited the greatest activity (TOFPd = 2 min–1) and highest N2 selectivity (94%) for E-NRR, while the same SAA performed poorly for T-NRR as compared to other nanoalloy counterparts. DFT calculations demonstrate that the improved performance and N2 selectivity of Pd/Cu(1:100) in E-NRR compared to T-NRR originate from the higher stability of NO3* in electrocatalysis and a lower N2 formation barrier than NH due to localized pH effects and the ability to extract protons from water. This study establishes the performance and mechanistic differences of SAA and nanoalloys for T-NRR versus E-NRR.

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Contrasting Capability of Single Atom Palladium for Thermocatalytic versus Electrocatalytic Nitrate Reduction Reaction

Nazemi

Gupta

et al. 2023

ACS Catal.

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show abstract

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Carbon supported Pd–Cu nanoalloys: support and valence band structure influence on reduction and oxidation reactions

Abstract: The present study has tracked the changes in the electronic and structural properties of Pd–Cu nanoalloys that were influenced by the composition and chosen support.

Cited by 1 publication

References 25 publications

Contrasting Capability of Single Atom Palladium for Thermocatalytic versus Electrocatalytic Nitrate Reduction Reaction

Contrasting Capability of Single Atom Palladium for Thermocatalytic versus Electrocatalytic Nitrate Reduction Reaction

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