High-performance flower-like and biocompatible nickel-coated Fe3O4@SiO2 magnetic nanoparticles decorated on a graphene electrocatalyst for the oxygen evolution reaction

Lin, Zongli; Li, Ye; Zhu, Pengcheng; Wang, Tian-xing; Li, Xiaolei

doi:10.1039/d3na00195d

Cited by 2 publications

(1 citation statement)

References 53 publications

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“…To produce the same catalytic current density (10 mA cm À 2 ), pure SiO 2 and TiN catalysts require a much greater onset potential (394 mV) and an overpotential (522 mV). SiO x /Ru NSs 234 mV 64 [46] Co 3 O 4 @SiO 2 529 mV 107.7 [47] Fe 3 O 4 @SiO 2 @NiO/graphene/C 3 N 4 288 mV 40.46 [48] Fe-Co 2 SiO 4 330 mV 64 [49] FeNi-Mo 2 C@SiO 2 180 mV 11.0 [50] TiN @ Co 5.47 N 398, 248, and 411 mV in acidic, basic, and neutral electrolyte, (50 mA cm À 2 ) 42.5 [51] Ir-TiN NWs 380 mV - [52] TiN/g-C 3 N 4 320 mV 181 [53] TiNO films 290 mV 57 [54] SiO 2 @TiN 256 40 This Study OER on SiO 2 @TiN catalyst involves a sequence of steps orchestrated by synergistic interplay of titanium nitride (TiN) and silicon dioxide (SiO 2 ). Initially, water molecules adsorb onto catalytic surface, facilitated by interaction between TiÀ N moieties and SiO 2 support.…”

Section: Resultsmentioning

confidence: 99%

Production of hydrogen via water oxidation using mesoporous‐assembled SiO2@TiN nanocomposite electrocatalyst

Alothman,

Shah,

Abid

et al. 2024

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Electrochemical water splitting is one of the promising approaches for the production of molecular hydrogen as well as to meet the clean and sustainable energy demand of the modern world. However, the key task for the research communities is to design a cost‐effective and efficient electrocatalyst to contribute positively to recent world crises. This study presents a novel SiO2@TiN nanocomposite and utilize it for oxygen evolution reaction (OER) as an electrocatalysts. The different techniques use for the characterization of SiO2@TiN nanocomposite. The electrochemical investigations encompass linear sweep voltammetry (LSV), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) which collectively yield critical parameters for assessing electrocatalytic performance. At a current density of 10 mAcm−2 the SiO2@TiN nanocomposite has a substantially lower overpotential of 256 mV compared to pure SiO2 and TiN. The composite also shows smaller tafel slope of 40 mV dec−1 as well as lower overpotential. The SiO2@TiN nanocomposite also demonstrates the enhanced redox activity as a result of its synergistic effect. Consequently, the increased electrical conductivity of TiN facilitates the attachment of metal oxides and more active sites are exposed to improve the OER activity of the fabricated materials.

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Section: Resultsmentioning

confidence: 99%

Production of hydrogen via water oxidation using mesoporous‐assembled SiO2@TiN nanocomposite electrocatalyst

Alothman,

Shah,

Abid

et al. 2024

ChemistrySelect

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Advances in Spin‐Modulated Electrocatalysis of Oxygen Evolution Reaction

Taspya,

Snigdha,

Islam

2024

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Electrochemical splitting of water for hydrogen generation has emerged as a potential strategy for transitioning towards renewable energy sources and mitigating the environmental impact of fossil fuel dependence. However, the efficiency of water splitting is mainly hindered by oxygen evolution reaction (OER) at the anode side, which involves kinetically sluggish four proton‐coupled electron‐transfer steps. Recent studies on OER demonstrate that a spin‐dependent mechanism governs the reaction kinetics, wherein the electronic exchange interactions in the catalytic activity of transition metals can provide a spin‐selective channel to filter out electron spins with the right orientation during the formation of O2. Maximizing efficiency and stability of such catalysts require optimization the geometric and electrical structures of transition metal systems. In addition, it is vital to understand the OER mechanism with spin considerations to be familiar with the connection between spin, charge, orbital, and lattice characteristics. This review focuses on current developments in understanding and the use of the spin‐related effect in the OER mechanism.

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High-performance flower-like and biocompatible nickel-coated Fe₃O₄@SiO₂ magnetic nanoparticles decorated on a graphene electrocatalyst for the oxygen evolution reaction

Abstract: The electrocatalytic oxygen evolution reaction (OER) plays a crucial role in renewable clean energy conversion technologies and has developed into an important direction in the field of advanced energy, becoming...

Cited by 2 publications

References 53 publications

Production of hydrogen via water oxidation using mesoporous‐assembled SiO2@TiN nanocomposite electrocatalyst

Production of hydrogen via water oxidation using mesoporous‐assembled SiO2@TiN nanocomposite electrocatalyst

Advances in Spin‐Modulated Electrocatalysis of Oxygen Evolution Reaction

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