Design of bimetallic nickel-iron quantum dots with tunable compositions for enhanced electrochemical water splitting

Cirone, Joseph; Dondapati, Jesse S.; Chen, Aicheng

doi:10.1016/j.electacta.2021.139016

Cited by 11 publications

(2 citation statements)

References 46 publications

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“…However, the deposition of a desired active material onto these structures remains challenging due to long deposition times or complicated procedures with little or no control over the process. Quantum dots (QDs) have gained great attention mainly due to their large surface areas, unique electrochemical and photochemical properties, and tunable emissions. − Achieving very small particles such as CdS QDs has been made possible through a facile chemical bath deposition (CBD) method, which makes it a promising technique for deposition of various materials. The CBD method is a simple fabrication procedure where the loading amounts and the particle sizes can be controlled by the composition and concentration of the bath, number of cycles, and duration of the process …”

Section: Introductionmentioning

confidence: 99%

Sodium Hexa-Titanate Nanowires Modified with Cobalt Hydroxide Quantum Dots as an Efficient and Cost-Effective Electrocatalyst for Hydrogen Evolution in Alkaline Media

Amiri

Dondapati

Quintal

et al. 2022

ACS Appl. Mater. Interfaces

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A novel electrocatalyst with high activity and enhanced durability toward the hydrogen evolution reaction (HER) in alkaline media has been designed and fabricated based on sodium hexa-titanate (Na2Ti6O13) nanowires synthesized by a hydrothermal process and modified with Co(OH)2 quantum dots (QDs) by a facile chemical bath deposition (CBD) method. The current response of the developed Ti/Na2Ti6O13/Co(OH)2 nanocomposite electrode attained 10 mA cm–2 at an overpotential of 159 mV. The nanocomposite electrode exhibited a high stability at an applied current of 100 mA cm–2. The remarkable catalytic behavior was achieved with a loading amount of ca. 0.06 mg cm–2 cobalt hydroxide. This is attributed to the high electrochemically active surface area (EASA) gained by the nanowire-structured substrate and considerable enhancement of electrochemical conductivity with the use of Co(OH)2 quantum dots as an active material. The superior catalytic activity and high stability show that the developed catalyst is a promising candidate for hydrogen production in alkaline media.

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Section: Introductionmentioning

confidence: 99%

Sodium Hexa-Titanate Nanowires Modified with Cobalt Hydroxide Quantum Dots as an Efficient and Cost-Effective Electrocatalyst for Hydrogen Evolution in Alkaline Media

Amiri

Dondapati

Quintal

et al. 2022

ACS Appl. Mater. Interfaces

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“…CP is a material characterized by interconnected carbon fibers of micrometric dimensions, due to its structure and properties, and it has a high chemical stability, high surface area and good electrical conductivity. Furthermore, considering the excellent results obtained in the case of Ni-based nanostructured electrodes for alkaline electrolyzers [ 49 , 50 , 51 ], in this work, the Pd–Co alloys have been obtained in the form of an array of nanowires using alumina membranes (AAM) as the template [ 52 , 53 , 54 , 55 ]. In fact, as demonstrated in [ 56 , 57 , 58 , 59 , 60 , 61 , 62 ], due to the high surface area, the electrodes based on the arrays of nanowires showed very good performance compared to the planar ones.…”

Section: Introductionmentioning

confidence: 99%

Pd–Co-Based Electrodes for Hydrogen Production by Water Splitting in Acidic Media

et al. 2023

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To realize the benefits of a hydrogen economy, hydrogen must be produced cleanly, efficiently and affordably from renewable resources and, preferentially, close to the end-users. The goal is a sustainable cycle of hydrogen production and use: in the first stage of the cycle, hydrogen is produced from renewable resources and then used to feed a fuel cell. This cycle produces no pollution and no greenhouse gases. In this context, the development of electrolyzers producing high-purity hydrogen with a high efficiency and low cost is of great importance. Electrode materials play a fundamental role in influencing electrolyzer performances; consequently, in recent years considerable efforts have been made to obtain highly efficient and inexpensive catalyst materials. To reach both goals, we have developed electrodes based on Pd–Co alloys to be potentially used in the PEMEL electrolyzer. In fact, the Pd–Co alloy is a valid alternative to Pt for hydrogen evolution. The alloys were electrodeposited using two different types of support: carbon paper, to fabricate a porous structure, and anodic alumina membrane, to obtain regular arrays of nanowires. The goal was to obtain electrodes with very large active surface areas and a small amount of material. The research demonstrates that the electrochemical method is an ideal technique to obtain materials with good performances for the hydrogen evolution reaction. The Pd–Co alloy composition can be controlled by adjusting electrodeposition parameters (bath composition, current density and deposition time). The main results concerning the fabrication process and the characterization are presented and the performance in acid conditions is discussed.

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Metal–Organic Framework as Electrocatalyst in Electrochemical Water Splitting

Khandekar,

Yadav

2024

Electrocatalytic Materials

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Design of bimetallic nickel-iron quantum dots with tunable compositions for enhanced electrochemical water splitting

Cited by 11 publications

References 46 publications

Sodium Hexa-Titanate Nanowires Modified with Cobalt Hydroxide Quantum Dots as an Efficient and Cost-Effective Electrocatalyst for Hydrogen Evolution in Alkaline Media

Sodium Hexa-Titanate Nanowires Modified with Cobalt Hydroxide Quantum Dots as an Efficient and Cost-Effective Electrocatalyst for Hydrogen Evolution in Alkaline Media

Pd–Co-Based Electrodes for Hydrogen Production by Water Splitting in Acidic Media

Metal–Organic Framework as Electrocatalyst in Electrochemical Water Splitting

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