Oxygen reduction reaction (ORR) in alkaline solution catalysed by an atomically precise catalyst based on a Pd(<scp>ii</scp>) complex supported on multi-walled carbon nanotubes (MWCNTs). Electrochemical and structural considerations

Monini, Valeria; Bonechi, Marco; Bazzicalupi, Carla; Bianchi, Antonio; Gentilesca, Pietro; Giurlani, Walter; Innocenti, Massimo; Meoli, Arianna; Romano, Giammarco Maria; Savastano, Matteo

doi:10.1039/d3dt03947a

Cited by 4 publications

(2 citation statements)

References 78 publications

(122 reference statements)

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“…Carbon neutrality has become a crucial subject due to the need for alternatives to fossil fuels to address global warming and environmental damage. , Fuel cells (FCs) and rechargeable metal-air batteries (MABs) are essential components of the renewable energy system due to their exceptional efficiency, high power density, dependability, and environmentally beneficial nature. , Both the FCs and MABs share the cathodic reaction of oxygen reduction reaction (ORR), which is a crucial reaction that determines the rate due to its slow kinetics . Hence, creating highly efficient ORR electrocatalysts is crucial for their broad use.…”

Section: Introductionmentioning

confidence: 99%

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%

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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“…Currently, rechargeable Zn-air batteries have a broad application prospect in the new generation of renewable energy conversion due to their advantages of high specific capacity, low cost, high security, and being pollution-free. , However, the commercial development of Zn-air batteries faces the major challenge of the slow kinetics of the two main reactions, oxygen reduction reaction (ORR) and oxygen precipitation reaction (OER), on the air cathode. − Therefore, an ideal bifunctional catalyst needs to be designed to reduce the overpotential and accelerate the kinetic process. Pt-based and Ru-based catalysts based on precious metals are the best catalysts for catalytic activity, but their limited resources, expensive nature, and poor corrosion resistance inevitably restrict the commercialization of Zn-air batteries. − …”

Section: Introductionmentioning

confidence: 99%

Microenvironment Tailoring of NiCo Alloys Coupled with FePc as Efficient Bifunctional Catalysts for High-Rate Zn-Air Batteries

Chen,

Yue,

et al. 2024

Langmuir

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The practical application of Zn-air batteries require exploring cost-effective and durable bifunctional electrocatalysts. However, the simultaneous preparation of catalysts with bifunctional activities for oxygen reduction reaction (ORR) and oxygen precipitation reaction (OER) remains challenging. Herein, we synthesized a novel hybrid catalyst (FePc/ NiCo/CNT), which couples NiCo alloy with FePc through electrostatic interaction. The interaction between FePc and NiCo alloy can enhance the intrinsic catalytic activity of the active site Fe−N 4 and prevent the electrolyte corrosion of the metal alloy, ultimately improving the stability of the catalyst by the microenvironment-tailoring strategy. The resultant FePc/NiCo/CNT catalyst exhibits outstanding oxygen reduction reaction (ORR) activity with a half-wave potential of 0.88 V, which is attributed to the abundant Fe−N x active sites. Furthermore, the electron interactions between NiCo/CNT and FePc accelerate electron transfer and enhance the activation of oxygen intermediates, consequently boosting the OER activity with an overpotential of 260 mV at 10 mA cm −2 . The Zn-air batteries assembled with FePc/NiCo/CNT show a high power density of 175.1 mW cm −2 and excellent cycling stability for up to 430 h at 20 mA cm −2 . The preparation of oxygen electrode catalysts for renewable clean energy devices can be made more convenient with this directly engineered strategy for ORR and OER active centers.

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A combined solid state, solution and DFT study of a dimethyl-cyclen-Pd(ii) complex

Paderni,

Voccia,

Macedi

et al. 2024

Dalton Trans.

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Oxygen reduction reaction (ORR) in alkaline solution catalysed by an atomically precise catalyst based on a Pd(ii) complex supported on multi-walled carbon nanotubes (MWCNTs). Electrochemical and structural considerations

Abstract: A new atomically precise, single-ion catalyst (MWCNT-LPd) for ORR (oxygen reduction reaction), consisting of a Pd(II) complex of a tetraazacycloalkane anchored on multi walled carbon nanotubes, has been prepared through...

Cited by 4 publications

References 78 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

Microenvironment Tailoring of NiCo Alloys Coupled with FePc as Efficient Bifunctional Catalysts for High-Rate Zn-Air Batteries

A combined solid state, solution and DFT study of a dimethyl-cyclen-Pd(ii) complex

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