FeCoP nanosheets on NiO nanoparticles as electrocatalysts: tuning and stabilizing active sites for water splitting

Marimuthu, Sundaramoorthy; Shankar, Ayyavu; Maduraiveeran, Govindhan

doi:10.1039/d2cc06386g

Cited by 9 publications

(6 citation statements)

References 28 publications

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“…Additionally, shakeup satellites are observed at ∼860.8 and ∼878.6 eV, characteristic of the Ni 2+ valence state. 53 Similarly, the Pd@NiO|Ni electrode exhibits peaks around the binding energies of ∼854.9 and ∼872.7 eV corresponding to the Ni 2p 3/2 and Ni 2p 1/2 of the Ni 2p only. The satellite peaks are around ∼860.8 and ∼878.6 eV.…”

Section: ■ Results and Discussionmentioning

confidence: 97%

“…Regarding the Au@NiO|Ni electrode, the XPS peaks observed at ∼854.9 eV and ∼872.7 eV correspond to the Ni 2p 3/2 and Ni 2p 1/2 orbitals of the Ni 2p in the Ni(OH) 2 phase . Additionally, shakeup satellites are observed at ∼860.8 and ∼878.6 eV, characteristic of the Ni 2+ valence state . Similarly, the Pd@NiO|Ni electrode exhibits peaks around the binding energies of ∼854.9 and ∼872.7 eV corresponding to the Ni 2p 3/2 and Ni 2p 1/2 of the Ni 2p only.…”

Section: Resultsmentioning

confidence: 97%

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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: ■ Results and Discussionmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 97%

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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“…Metal hydroxide have shown potential for the water splitting. [19,[54][55][56] However, the surface of the material had a high capacity for adsorbing H*, which impeded the release of hydrogen and hence hindered the electrocatalytic activity. [57] Sun et al [58] have synthesized Pt nanoparticles on Ni(OH) 2 nanosheets (Figure 7a).…”

Section: Hydrogen Spillover Through the Interface Of Metal And Semico...mentioning

confidence: 99%

Hydrogen Spillover Effect in Electrocatalysis: Delving into the Mysteries of the Atomic Migration

Gaur,

Sharma,

Han

2024

Energy & Environ Materials

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Hydrogen spillover effect has recently garnered a lot of attention in the field of electrocatalytic hydrogen evolution reactions. A new avenue for understanding the dynamic behavior of atomic migration in which hydrogen atoms moving on a catalyst surface was opened up by the setup of the word “hydrogen spillover.” However, there is currently a dearth of thorough knowledge regarding the hydrogen spillover effect. Currently, the advancement of sophisticated characterization procedures offers progressively useful information to enhance our grasp of the hydrogen spillover effect. The understanding of material fabrication for hydrogen spillover effect has erupted. Considering these factors, we made an effort to review most of the articles published on the hydrogen spillover effect and carefully analyzed the aspect of material fabrication. All of our attention has been directed toward the molecular pathway that leads to improve hydrogen evolution reactions performance. In addition, we have attempted to elucidate the spillover paths through the utilization of DFT calculations. Furthermore, we provide some preliminary research suggestions and highlight the opportunities and obstacles that are still to be confronted in this study area.

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“…6 To increase the specific activities of the underlying electrocatalysts, one needs to consider improving the surface/interface reactive properties, reducing the size of the electrocatalysts to increase the accessible number of active sites, and stabilization of the active centres. 7,8 Despite the substantial advancements made with non-precious catalysts, 9,10 platinum (Pt)-, iridium (Ir)- and ruthenium (Ru)-based materials are considered to be the most effective catalysts for electrochemical green-hydrogen generation. 11–13 However, the high price and scarcity of state-of-the-art precious-metal-based catalysts hamper their widespread use in electrolyzers for the production of H 2 .…”

Section: Introductionmentioning

confidence: 99%

High-valent iron single-atom catalysts for improved overall water splitting via a reduced energy barrier and stabilization of the active center

Shankar,

Marimuthu,

Maduraiveeran

2024

J. Mater. Chem. A

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FeCoP nanosheets on NiO nanoparticles as electrocatalysts: tuning and stabilizing active sites for water splitting

Abstract: Herein, we demonstrate a novel strategy to tailoring and stabilizing the active sites interface on hierarchical three-dimensional (3-D) iron-cobalt phosphides Fe1-xCoxP nanosheets on nickel oxide nanoparticles for overall water splitting....

Cited by 9 publications

References 28 publications

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

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

Hydrogen Spillover Effect in Electrocatalysis: Delving into the Mysteries of the Atomic Migration

High-valent iron single-atom catalysts for improved overall water splitting via a reduced energy barrier and stabilization of the active center

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