3D Hierarchical‐Architectured Nanoarray Electrode for Boosted and Sustained Urea Electro‐Oxidation

Small, Journal Year: 2023, Volume and Issue: 19(30)

Published: April 10, 2023

Exploring active and durable Ni-based materials with optimized electronic architectural engineering to promote the urea oxidation reaction (UOR) is pivotal for urea-related technologies. Herein a 3D self-supported hierarchical-architectured nanoarray electrode (CC/MnNi@NC) proposed in which 1D N-doped carbon nanotubes (N-CNTs) 0D MnNi nanoparticles (NPs) encapsulation are intertwined into 2D nanosheet aligned on cloth prominently boosted sustained UOR electrocatalysis. From combined experimental theoretical investigations, Mn-alloying can regulate Ni state downshift of d-band center, facilitating Ni3+ species generation prompting rate-determining step (*COO intermediate desorption). Meanwhile, micro/nano-hierarchical configuration N-CNTs encapsulating NPs not only endow strong operational durability against metal corrosion/agglomeration enrich density sites, but also accelerate electron transfer, more intriguingly, mass transfer as result desirable superhydrophilic quasi-superaerophobic characteristics. Therefore, such elegant integration 0D, motifs architecture, resulting CC/MnNi@NC deliver admirable performance, favorably comparable best-performing electrocatalysts reported thus far. This work opens fresh prospect developing advanced via manipulation coupled various energy conversion

Language: Английский

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Construction of nickel phosphide/iron oxyhydroxide heterostructure nanoparticles for oxygen evolution

Nano Energy, Journal Year: 2024, Volume and Issue: 123, P. 109402 - 109402

Published: Feb. 21, 2024

Language: Английский

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Recent advances in hydrogen production coupled with alternative oxidation reactions

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 509, P. 215777 - 215777

Published: March 26, 2024

Language: Английский

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Facing the “Cutting Edge:” Edge Site Engineering on 2D Materials for Electrocatalysis and Photocatalysis

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 31, 2025

The utilization of 2D materials as catalysts has garnered significant attention in recent years, primarily due to their exceptional features including high surface area, abundant exposed active sites, and tunable physicochemical properties. unique geometry imparts them with versatile sites for catalysis, basal plane, interlayer, defect, edge sites. Among these, hold particular significance they not only enable the activation inert but also serve platforms engineering achieve enhanced catalytic performance. Here it is comprehensively aimed summarize state-of-the-art advancements on electrocatalysis photocatalysis, applications ranging from water splitting, oxygen reduction, nitrogen reduction CO2 reduction. Additionally, various approaches harnessing modifying are summarized discussed. guidelines rational heterogeneous catalysis provided.

Language: Английский

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Stabilizing efficient structures of superwetting electrocatalysts for enhanced urea oxidation reactions

Chem Catalysis, Journal Year: 2022, Volume and Issue: 2(11), P. 3254 - 3270

Published: Oct. 13, 2022

Layered hydroxides have shown superior catalytic activity for the electrocatalytic organic compound oxidation reaction. However, metal leaching can lead to uncontrollable structural phase transformation. Here, we report a Cr-Ni(OH)2 electrocatalyst as model of pre-catalyst identification structure-performance relationship. The optimized delivered superb performances, i.e., low potential 1.38 V (versus reversible hydrogen electrode [RHE]) reach 100 mA cm−2 and stable over 200 h at 10 cm−2. In situ analyses theoretical calculations demonstrate that well-tuned electronic structures superhydrophilic-superaerophobic surface enable rapid urea reaction (UOR) kinetics, which reduces specific adsorption OH− significantly depresses Cr dopants leaching, this helps maintain high UOR performance. Furthermore, crucial role mass transfer improvement alleviate decay under potentials is disclosed.

Language: Английский

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Copper foam-derived electrodes as efficient electrocatalysts for conventional and hybrid water electrolysis

Materials Reports Energy, Journal Year: 2022, Volume and Issue: 2(2), P. 100092 - 100092

Published: April 11, 2022

Electrochemical water splitting has been demonstrated as a promising technology for the renewable generation of green hydrogen from water. Despite extensive progress in materials science, one particular challenge further development towards industrial application lies rational design and exploitation efficient cost-effective materials, especially oxygen evolution reaction (OER) electrocatalysts at anode. In addition, attempts to replace OER with other more oxidizable anode reactions are being evaluated groundbreaking strategy generating lower potentials reducing overall energy costs while producing valuable chemicals simultaneously. Compared Fe/Co/Ni-based compounds, Cu-based have not received research attention electrode designs despite their high conductivity abundant earth reserves. this review, combining advantages three-dimensional network structure metal foams, we summarize recent on Cu foam (CF)-derived pure electrolysis hybrid electrolysis. The CF strategies enhance electrocatalytic activity operational durability presented first. Catalyst fabrication then highlighted structure-activity relationship is also discussed. Finally, propose challenges perspectives self-supported electrodes beyond CF-derived materials.

Language: Английский

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Ni‐Doped CuO Nanoarrays Activate Urea Adsorption and Stabilizes Reaction Intermediates to Achieve High‐Performance Urea Oxidation Catalysts

Advanced Science, Journal Year: 2022, Volume and Issue: 9(34)

Published: Oct. 20, 2022

Urea oxidation reaction (UOR) with a low equilibrium potential offers promising route to replace the oxygen evolution for energy-saving hydrogen generation. However, overpotential of UOR is still high due complicated 6e

Language: Английский

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Lattice-disordered high-entropy metal hydroxide nanosheets as efficient precatalysts for bifunctional electro-oxidation

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 642, P. 41 - 52

Published: March 25, 2023

Language: Английский

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Realizing highly-efficient urea oxidation via decreasing the energy barrier of deprotonation over regulated electronic structure of Co doped Ni(OH)2

Applied Surface Science, Journal Year: 2023, Volume and Issue: 640, P. 158391 - 158391

Published: Sept. 7, 2023

Language: Английский

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Multi-site trifunctional hydrangea-like electrocatalysts for efficient industrial-level water/urea electrolysis with current density exceeding 1000 mA cm−2

Science China Materials, Journal Year: 2023, Volume and Issue: 66(9), P. 3520 - 3529

Published: Aug. 18, 2023

Language: Английский

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