Challenges and Prospects of Catalyst Design and Environmental Applications for On‐Site Hydrogen Peroxide Production via Diverse (Photo)Electrochemical Reaction Pathways

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 9, 2025

Hydrogen peroxide (H2O2) is an environmentally friendly and efficient oxidant with diverse applications in the chemical industry, medicine, energy, environmental protection. While anthraquinone oxidation process has traditionally dominated industrial H2O2 production, its complexity high pollution levels present significant challenges. In response, alternative methods such as electrochemical, photochemical, photoelectrochemical pathways have emerged, providing greener more sustainable solutions. These innovative approaches leverage only water, oxygen, solar or electrical positioning them viable substitutes for energy-intensive process. This review delves into latest advancements production through twoelectron oxygen reduction reaction (2e-ORR), water (2e-WOR), synergistic two-channel pathway (2e-ORR + 2e-WOR) (photo)electrochemical systems, focusing on pathways. It discusses underlying mechanisms, evaluation parameters, design of high-performance catalysts on-site applications. Recent developments advanced (photo)electrocatalysts over past five years are highlighted, including key strategies that enhance catalytic performance. The also addresses future challenges prospects catalyst practical systems serving a valuable reference researchers field.

Language: Английский

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Monomolecule Coupled to Oxygen‐Doped Carbon for Efficient Electrocatalytic Hydrogen Peroxide Production

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

Published: Feb. 25, 2025

The electrocatalytic production of hydrogen peroxide (H2O2) is an ideal alternative for the industrial anthraquinone process because environmental friendliness and energy efficiency, depending on activity selectivity catalysts. Carbon-based materials possess prospects as candidate catalysts H2O2. Herein, cedar-derived monolithic carbon modified with coupling oxygen doping phthalocyanine molecules are synthesized. Cobalt (CoPc) introduced onto surface to construct monomolecular active sites via π-π stacking. electronic structure CoPc modulated by substrates, mediated A synergistic effect optimally interaction between key intermediate barrier reduction reduced optimize CoPc@OCW provided up 99% H2O2 at 0.7 V versus RHE. In a three-phase flow cell, achieved yield 10.4 mol·g-1·h-1 0.2 RHE stable running 24 h. advantages carbon-based including adjustable chemical stacking atoms through improved catalytic performances in This proof-to-concept research demonstrates potential application molecular electrochemical synthesis.

Language: Английский

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Modulating the Oxygen Evolution Reaction of Single-Crystal Cobalt Carbonate Hydroxide via Surface Fe Doping and Facet Dependence

The Journal of Physical Chemistry Letters, Journal Year: 2025, Volume and Issue: unknown, P. 1073 - 1080

Published: Jan. 22, 2025

The oxygen evolution reaction (OER) is a critical half-reaction in water splitting and metal–air cells. sensitivity of the OER to composition structure electrocatalyst presents significant challenge elucidating structure–property relationship. In this study, highly stable single-crystal cobalt carbonate hydroxide [Co2(OH)2CO3, CoCH] was used as model investigate correlations among structure, composition, reactivity. Single-crystal CoCH nanowires (denoted NWs) Fe-doped Fe-CoCH with an exposed (210) facet nanosheets NSs) (2–13) were synthesized using electrochemical one-step hydrothermal strategies, respectively. Their activity decreased following order: NWs > NSs NWs. Theoretical investigation suggested that doped Fe sites serve active sites, crystal-facet dependence can finely adjust 3d configuration resulting optimal adsorption strengths energy barriers for potential-determining steps on CoCH. This renders as-prepared some most promising Co-based catalysts.

Language: Английский

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Surface Ni/Fe/Mn active diffusion layer formed via dual-cation etching of LaNiO3 perovskite: An efficient bifunctional catalyst for Zn-Air batteries

Applied Surface Science, Journal Year: 2025, Volume and Issue: unknown, P. 162547 - 162547

Published: Jan. 1, 2025

Language: Английский

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Prokaryote‐Inspired and Derived Oxygen Reduction Electrocatalysts for Ultra‐Long‐Life Zn–Air Batteries

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

Published: Feb. 10, 2025

Abstract The design of efficient oxygen reductionreaction (ORR) catalyst with fast kinetics is crucial for high‐performance Zn–air batteries but remains a challenge. Herein, inspired by the oxidative respiratory chain prokaryotes, an ORR electrocatalyst reported mimicking microstructure Staphylococcus aureus and simitaneously utilizing this low‐cost cell as precursor. consists MnO 2 /Co P nanocomposites support on aureus‐derived hollow spherical carbon, which not only accelerates electron transfer improved intrinsic reaction kinetics, also creates OH − concentration gradient enhanced mass efficiency. Such bio‐inspired derived enables rechargeable ultra‐long cycling stability more than 2800 h at high capacity 810.3 mAh g −1 , superior among bio‐derived catalysts. A flexible battery based assembled, it well integrates wireless electronic skin.

Language: Английский

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Binary Metal Sulfide Nanoparticles as a Bifunctional Electrocatalyst for Durable Zn-Air Batteries

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 12, 2025

Language: Английский

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Biological Neural Network‐Inspired Micro/Nano‐Fibrous Carbon Aerogel for Coupling Fe Atomic Clusters With Fe‐N₄ Single Atoms to Enhance Oxygen Reduction Reaction

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 5, 2025

Nitrogen-coordinated metal single atoms catalysts, especially with M-N4 configuration confined within the carbon matrix, emerge as a frontier of electrocatalytic research for enhancing sluggish kinetics oxygen reduction reaction (ORR). Nevertheless, due to highly planar D4h symmetry in M-N4, their adsorption behavior toward intermediates is limited, undesirably elevating energy barriers associated ORR. Moreover, structural engineering substrate also poses significant challenges. Herein, inspired by biological neural network (BNN), reticular nervous system high-speed signal processing and transmitting, comprehensive biomimetic strategy proposed tailoring Fe-N4 (Fe SAs) coupled Fe atomic clusters ACs) active sites, which are anchored onto chitosan microfibers/nanofibers-based aerogel (CMNCA-FeSA+AC) continuous conductive channels an oriented porous architecture. Theoretical analysis reveals synergistic effect SAs ACs optimizing electronic structures expediting The ingenious will shed light on topology optimization efficient electrocatalysts advanced electrochemical conversion devices.

Language: Английский

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Aqueous Zinc‐Based Batteries: Active Materials, Device Design, and Future Perspectives

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

Published: March 5, 2025

Abstract Aqueous zinc‐based batteries (AZBs) are emerging as a compelling candidate for large‐scale energy storage systems due to their cost‐effectiveness, environmental friendliness, and inherent safety. The design development of high‐performance AZBs have thus been the focus considerable study efforts; yet, certain properties electrode materials electrolytes still limit development. Here, comprehensive overview evaluation current progress, existing limitations, potential solutions achieve long‐cycle stability fast kinetics in is provided. Detailed analyses structural design, electrochemical behavior, zinc‐ion mechanisms various presented. Additionally, key issues research directions related zinc anodes selection systematically discussed guide future with superior performance. Finally, this review provides outlook on AZBs, highlighting challenges opportunities, foster continued rapid advancement broader practical applications field.

Language: Английский

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Elucidating the Chirality-Induced Spin Selectivity Effect of Co-Doped NiO Deposited on Ni Foam for Highly Stable Zn–Air Batteries

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: March 13, 2025

The urgent need to alleviate global warming and limit the consumption of fossil fuels has prompted development rechargeable Zn–air batteries (ZABs) considering their superior energy density, safety, cost-effectiveness. However, sluggish reaction kinetics oxygen evolution (OER) unfavorable properties conventional OER catalysts (including low electrical conductivity use active site-blocking binders) hinder practically viable ZABs. Herein, we report a distinct approach for directly synthesizing cobalt-doped nickel oxide (Co-NiO) with chiral structure on porous Ni foam via one-step hydrothermal process. chirality-induced spin selectivity (CISS) boosts kinetics, while Co doping elevates abundance sites catalyst. Co-NiO demonstrates an current density 10 mA cm–2 at 1.58 V versus reversible hydrogen electrode, outperforming both achiral undoped NiO. Furthermore, Co-NiO-based ZAB high open-circuit potential (1.57 V), charge/discharge overpotential (0.71 excellent stability 960 h (40 days) because CISS effect mitigates production corrosive singlet oxygen. These results represent prominent pathway advancement ZABs using low-cost catalyst modulated by heteroatomic doping.

Language: Английский

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Modulation of a NiFe‐Layered Double Hydroxide Electrode Using Zn Doping and Selective Etching Process for High‐Performance Oxygen Evolution Reaction

Battery energy, Journal Year: 2025, Volume and Issue: unknown

Published: March 22, 2025

ABSTRACT In the generation of green hydrogen and oxygen from water, transition metal–based electrode materials have been considered high‐performance water‐splitting catalysts. water splitting, evolution reaction (OER) is rate‐determining step. To overcome high overpotential slow kinetics OER, development effective catalysts to improve electrolysis efficiency essential. Nickel–iron‐layered double hydroxides (NiFe‐LDHs) recognized for their superior electrochemical performance under alkaline OER conditions emerged as promising owing unique structure that enhances electrolyte infiltration exposes more active sites. However, modulation crystalline NiFe‐LDHs can further performance. Accordingly, this study introduces an innovative synthesis approach based on Zn doping selective etching increase ECSA induce favorable transition‐metal oxidation states in NiFe‐LDHs, thereby improving efficiency. After 6 h (Ni 2.9 0.1 Fe‐6h), optimized Ni Fe LDH sample demonstrated remarkable stability, requiring small overpotentials 192 260 mV at current densities 10 100 mA cm −2 , respectively. Moreover, Fe‐6h could maintain its original (260 mV) a density 250 h. The proposed subsequent partial practically be applied numerous

Language: Английский

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