Molecular catalyst of Fe phthalocyanine loaded into In-based MOF-derived defective carbon nanoflowers for oxygen reduction

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 483, P. 149243 - 149243

Published: Feb. 2, 2024

Language: Английский

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Insights on Ni-based layered double hydroxides for electrochemical supercapacitors: Underlying aspects in rational design and structural evolution

Journal of Energy Storage, Journal Year: 2023, Volume and Issue: 72, P. 108305 - 108305

Published: July 12, 2023

Language: Английский

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Revealing the Impact of Pulsed Laser-Produced Single-Pd Nanoparticles on a Bimetallic NiCo₂O₄ Electrocatalyst for Energy-Saving Hydrogen Production via Hybrid Water Electrolysis

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(5), P. 3320 - 3335

Published: Feb. 16, 2024

Nowadays, the assembling of hybrid water electrolysis using a hydrazine oxidation reaction (HzOR) instead slow anodic oxygen evolution (OER) has been established as favorable technology for efficient hydrogen (H2) production. Nevertheless, it is still critical to develop highly effective bifunctional electrocatalysts both (HER) and HzOR. In this work, we propose facile approach design synthesis single-Pd-nanoparticles-decorated bimetallic NiCo2O4 nanoplates electrocatalyst HER Initially, are synthesized by combination hydrothermal high-temperature calcination. Subsequently, single-Pd nanoparticles with varying proportions decorated on via pulsed laser irradiation (PLI), leading formation Pd/NiCo2O4 composites. The optimized composite shows remarkable electrocatalytic ability low overpotential 294 mV an ultrasmall working potential −6 (vs RHE) HzOR at 10 mA cm–2 in 1 M KOH electrolyte. Thus, overall splitting (OHzS) electrolyzer Pd/NiCo2O4∥Pd/NiCo2O4 system presents current densities 100 respective cell voltages 0.35 0.94 V. Notably, situ/operando Raman spectroscopy confirms surface α-Co(OH)2 during γ-NiOOH Furthermore, density function theory (DFT) calculations demonstrate that decoration Pd onto facilitates optimization adsorption free energy (ΔGH*) enhancement dehydrogenation kinetics. This work introduces strategy fabricating electrocatalysts, potentially useful energy-saving H2

Language: Английский

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Exploring Ir-doped NiFe-LDH nanosheets via a pulsed laser for oxygen evolution kinetics: in situ Raman and DFT insights

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(15), P. 8694 - 8706

Published: Jan. 1, 2024

Herein, we present Ir-doped NiFe-LDH nanosheets synthesized via a pulsed laser irradiation strategy, showing superior electrocatalytic OER kinetics. We investigate the origin of activity in NiFeIr-LDH through situ / operando Raman and DFT studies.

Language: Английский

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Growth-Controllable Spindle Chain Heterostructural Anodes Based on MIL-88A for Enhanced Lithium/Sodium Storage

Advanced Fiber Materials, Journal Year: 2024, Volume and Issue: 6(1), P. 297 - 311

Published: Jan. 19, 2024

Language: Английский

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Constructing Ag Single Atoms and Nanoparticles Co‐Decorated CoO(O)H as Highly Active Electrocatalyst for Oxygen Evolution Reaction under Large Current Density

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(32)

Published: April 3, 2024

Abstract Developing highly active and stable electrocatalysts is essential for the large‐scale production of hydrogen from alkaline water. In this work, Ag single atoms nanoparticles co‐decorated Co hydro(oxy)oxide (Ag SAs&NPs@CoO(O)H) synthesized by a facile one‐step approach. Notably, overpotential SAs&NPs@CoO(O)H 200 mV at current density 50 mA cm −2 during oxygen evolution reaction (OER). Meanwhile, it can display mass activity 637.47 A g −1 under 300 mV, which 212.49 times higher than that commercial IrO 2 . Moreover, assembled Pt/C // system only requires 1.9 V to reach an industrial 1000 in water electrolyzer exhibits excellent stability large Furthermore, situ Raman spectroscopy analysis coupled with theoretical calculations reveals novel site switching mechanism found on SAs&NPs@CoO(O)H. Specifically, O* preferentially generates NPs then switches toward 3+ CoO(O)H produce OOH* O SAs lattice exert inhibitory force reconstruction process CoOOH Co(OH) , resulting anti‐dissolution stability.

Language: Английский

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Synergistic Cu/Cu2O/Co3O4 catalyst with crystalline-amorphous interfaces for efficient electrochemical nitrate reduction to ammonia

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: 507, P. 160393 - 160393

Published: Feb. 7, 2025

Language: Английский

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Ru-triggered domino effect constructs a local acid-like environment to achieve the ampere-level current density of a/c-Ru-FeP/IF electrode for alkaline HER

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: unknown, P. 125030 - 125030

Published: Jan. 1, 2025

Language: Английский

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Novel Co3O4 decorated with rGO nanocatalyst to boost microwave-assisted biodiesel production and as nano-additive to enhance the performance-emission characteristics of diesel engine

Energy, Journal Year: 2023, Volume and Issue: 289, P. 129944 - 129944

Published: Dec. 14, 2023

Language: Английский

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Multicomponent Interface and Electronic Structure Engineering in Ir-Doped CoMO₄–Co(OH)₂ (M = W and Mo) Enable Promoted Oxygen Evolution Reaction

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(34), P. 16037 - 16046

Published: Aug. 9, 2024

The core principles of multicomponent interface and electronic structure engineering are essential in designing high-performance catalysts for the oxygen evolution reaction (OER). However, combining these aspects within a catalyst is significant challenge. In this investigation, novel approach involving development hybrid Ir-doped CoMO4–Co(OH)2 (M = W Mo) hollow nanoboxes was introduced, enabling remarkably efficient water oxidation electrocatalysis. Constructed from ultrathin nanosheet-assembled nanoboxes, structures boast wealth active centers intermediate species, which turn enhance both charge transfer mass transport capabilities. Moreover, compelling synergistic effects arising interaction between CoMO4 Co(OH)2 significantly bolster OER electrocatalysis by facilitating electron transfer. introduction Ir atoms serves to strategically adjust structure, fine-tune its state, operate as electrocatalysis, thus diminishing overpotential. This configuration results Ir-CoWO4–Co(OH)2 Ir-CoMoO4–Co(OH)2 exhibiting impressively low overpotentials 252 261 mV, respectively, 10 mA cm–2. Utilized conjunction with Pt/C two-electrode system overall splitting, mere 1.53 V cell potential needed achieve desired cm–2 current density.

Language: Английский

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