Core@shell structured NiCo@NiCoP nanorods vertically aligned on Ni foam as an efficient bifunctional electrocatalyst for overall water electrolysis

Lee, Yeeun; Min, Kyeongseok; Kim, Minjung; Min, Sojeong; Lee, Jaeseo; Baeck, Sung‐Hyeon

doi:10.1016/j.jallcom.2022.168683

“…Various types of thermal treatment, including annealing, calcination, pyrolysis, sintering, hydrothermal, and solvothermal among others, are examined, with a discussion on how temperature influences the treatment outcomes. [10][11] In addition, this review scrutinizes recent advances and case studies within the sphere of thermal treatmentenhanced electrocatalysis, specifically honing in on their implications for electrochemical technologies. Through an analytical lens applied to existing literature, noteworthy studies demonstrating the efficacy of thermal treatment in amplifying the electrocatalytic performance of diverse nanoelectrocatalysts are brought to the forefront.…”

Section: Introductionmentioning

confidence: 99%

“…A deep dive into the fundamentals of thermal treatment techniques and their effects on electrocatalytic materials is taken, with the intent to elucidate the underlying mechanisms and highlight the achievable benefits. Various types of thermal treatment, including annealing, calcination, pyrolysis, sintering, hydrothermal, and solvothermal among others, are examined, with a discussion on how temperature influences the treatment outcomes [10–11] …”

Section: Introductionmentioning

confidence: 99%

Unlocking Catalytic Potential: Exploring the Impact of Thermal Treatment on Enhanced Electrocatalysis of Nanomaterials

Kogularasu,

Lee,

Sriram

et al. 2023

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In the evolving field of electrocatalysis, thermal treatment of nano‐electrocatalysts has become an essential strategy for performance enhancement. This review systematically investigates the impact of various thermal treatments on the catalytic potential of nano‐electrocatalysts. The focus encompasses an in‐depth analysis of the changes induced in structural, morphological, and compositional properties, as well as alterations in electro‐active surface area, surface chemistry, and crystal defects. By providing a comprehensive comparison of commonly used thermal techniques, such as annealing, calcination, sintering, pyrolysis, hydrothermal, and solvothermal methods, this review serves as a scientific guide for selecting the right thermal technique and favorable temperature to tailor the nano‐electrocatalysts for optimal electrocatalysis. The resultant modifications in catalytic activity are explored across key electrochemical reactions such as electrochemical (bio)sensing, catalytic degradation, oxygen reduction reaction, hydrogen evolution reaction, overall water splitting, fuel cells, and carbon dioxide reduction reaction. Through a detailed examination of the underlying mechanisms and synergistic effects, this review contributes to a fundamental understanding of the role of thermal treatments in enhancing electrocatalytic properties. The insights provided offer a roadmap for future research aimed at optimizing the electrocatalytic performance of nanomaterials, fostering the development of next‐generation sensors and energy conversion technologies.

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Innovative Air Cathode with Ni‐Doped Cobalt Sulfide in Highly Ordered Macroporous Carbon Matrix for Rechargeable Zn–Air Battery

Son,

Min,

Cheong

et al. 2024

Advanced Science

0

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To realize the practical application of rechargeable Zn–Air batteries (ZABs), it is imperative to develop a non‐noble metal‐based electrocatalyst with high electrochemical performance for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Herein, Ni‐doped Co9S8 nanoparticles dispersed on an inverse opal‐structured N, S co‐doped carbon matrix (IO─NixCo9‐xS8@NSC) as a bifunctional electrocatalyst is presented. The unique 3D porous structure, arranged in an inverse opal pattern, provides a large active surface area. Also, the conductive carbon substrate ensures the homogeneous dispersion of NixCo9‐xS8 nanocrystals, preventing aggregation and increasing the exposure of active sites. The introduction of heteroatom dopants into the Co9S8 structure generates defect sites and enhances surface polarity, thereby improving electrocatalytic performance in alkaline solutions. Consequently, the IO─NixCo9‐xS8@NSC shows excellent bifunctional activity with a high half‐wave potential of 0.926 V for ORR and a low overpotential of 289 mV at 10 mA cm−2 for OER. Moreover, the rechargeable ZAB assembled with prepared electrocatalyst exhibits a higher specific capacity (768 mAh gZn−1), peak power density (180.2 mW cm−2), and outstanding stability (over 160 h) compared to precious metal‐based electrocatalyst.

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Unlocking Catalytic Potential: Exploring the Impact of Thermal Treatment on Enhanced Electrocatalysis of Nanomaterials

Kogularasu,

Lee,

Sriram

et al. 2023

View full text Add to dashboard Cite

In the evolving field of electrocatalysis, thermal treatment of nano‐electrocatalysts has become an essential strategy for performance enhancement. This review systematically investigates the impact of various thermal treatments on the catalytic potential of nano‐electrocatalysts. The focus encompasses an in‐depth analysis of the changes induced in structural, morphological, and compositional properties, as well as alterations in electro‐active surface area, surface chemistry, and crystal defects. By providing a comprehensive comparison of commonly used thermal techniques, such as annealing, calcination, sintering, pyrolysis, hydrothermal, and solvothermal methods, this review serves as a scientific guide for selecting the right thermal technique and favorable temperature to tailor the nano‐electrocatalysts for optimal electrocatalysis. The resultant modifications in catalytic activity are explored across key electrochemical reactions such as electrochemical (bio)sensing, catalytic degradation, oxygen reduction reaction, hydrogen evolution reaction, overall water splitting, fuel cells, and carbon dioxide reduction reaction. Through a detailed examination of the underlying mechanisms and synergistic effects, this review contributes to a fundamental understanding of the role of thermal treatments in enhancing electrocatalytic properties. The insights provided offer a roadmap for future research aimed at optimizing the electrocatalytic performance of nanomaterials, fostering the development of next‐generation sensors and energy conversion technologies.

show abstract

Core@shell structured NiCo@NiCoP nanorods vertically aligned on Ni foam as an efficient bifunctional electrocatalyst for overall water electrolysis

Cited by 17 publications

References 77 publications

Unlocking Catalytic Potential: Exploring the Impact of Thermal Treatment on Enhanced Electrocatalysis of Nanomaterials

Unlocking Catalytic Potential: Exploring the Impact of Thermal Treatment on Enhanced Electrocatalysis of Nanomaterials

Innovative Air Cathode with Ni‐Doped Cobalt Sulfide in Highly Ordered Macroporous Carbon Matrix for Rechargeable Zn–Air Battery

Unlocking Catalytic Potential: Exploring the Impact of Thermal Treatment on Enhanced Electrocatalysis of Nanomaterials

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