Metal-organic frameworks-based single-atom catalysts: From synthesis to sustainable electrocatalytic systems

Marimuthu, Sundaramoorthy; Yabesh, Nesan R.K.; Maduraiveeran, Govindhan

doi:10.1016/j.mtchem.2024.102035

Cited by 1 publication

(2 citation statements)

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“…This modulation aims to optimize the adsorption energy of oxygen species, thereby enhancing the kinetics of the ORR reaction and resulting in increased ORR activity. 26,27 However, stability problems that arose in carbonbased noble metal catalysts would be significantly reduced, thanks to the special qualities of metal oxide, such as strong corrosion resistance, especially in the acidic environment. 28−30 Sathyaseelan et al synthesized sPdNiA using a simple hydrazine-assisted reduction technique.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Strong metal–support interaction, the original notion, is the basis of this promising technique. , The metal–support interaction will modulate the local electronic structure of noble metals, specifically the d-band center, which is correlated with the number of unpaired electrons in the metal. This modulation aims to optimize the adsorption energy of oxygen species, thereby enhancing the kinetics of the ORR reaction and resulting in increased ORR activity. , However, stability problems that arose in carbon-based noble metal catalysts would be significantly reduced, thanks to the special qualities of metal oxide, such as strong corrosion resistance, especially in the acidic environment. − …”

Section: Introductionmentioning

confidence: 99%

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Potent Noble Metal–Nickel Oxide Interaction: A Strategy for Improved Oxygen Reduction Reaction via Engineering the Electronic Structure

Yabesh,

Marimuthu,

Maduraiveeran

2024

J. Phys. Chem. C

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Design of both efficient and durable electrode materials is key for oxygen reduction reaction (ORR) in influencing the efficacy of both fuel cells (FCs) and metal-air batteries (MABs). Here, we demonstrate the uniform dispersion of noble metals like (Au), palladium (Pd), and platinum (Pt) on nickel oxide on nickel electrodes (NM@NiO|Ni) for promoting ORR under alkaline electrolytes through engineering the electronic structures of noble metals as active sites. The NM@NiO|Ni electrodes are fabricated using acid etching followed by the galvanic replacement reaction method. Nickel oxide functions as an appropriate and encouraging support that can intensely interact with noble metals for both high catalytic activity and stability improvement. The Pd@NiO|Ni electrode exhibits prominent electrocatalytic ORR performance with an onset potential (E onset ) of ∼0.98 V [vs. reversible hydrogen electrode (RHE)], reduction potential (E) of ∼0.88 V (vs. RHE), catalytic cathodic current density of ∼−0.125 mA cm −2 at ∼0.88 V (vs. RHE), and mass activity of ∼0.38 Ag −1 in 0.1 M KOH, among the other developed electrodes in this study. The introduction of Pd as a second constituent to the NiO nanostructures enhanced the ORR performance expressively. The synergistic effects of Pd and Ni seem to possess a key impact on both catalytic ORR activity and stability. This strategy for enriching the catalytic active sites and the durability of the electrocatalysts demonstrates great potential for FC and MAB applications.

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Section: ■ Introductionmentioning

confidence: 99%