Pd Nanoparticles Decorated Hollow TiO₂ Nanospheres for Highly Sensitive and Selective UV-Assisted Hydrogen Gas Sensors

ACS Applied Energy Materials, Год журнала: 2024, Номер 7(14), С. 5608 - 5620

Опубликована: Июль 12, 2024

Hydrogen (H2) gas has great potential as an energy carrier in the emerging renewable market, emitting zero CO2. However, its high explosive and flammability pose substantial risk across production, storage, transport, consumption; thus, rapid detection of leaks is essential. In this research, hollow TiO2 nanospheres (h-TiO2 NS) with a mean diameter ∼216 nm are fabricated via solvothermal method. The NS were then chemically decorated Pd nanoparticles ∼3.0 (Pd/h-TiO2 NS). Pd/h-TiO2 enables permeation by H2, maximizing active sites due to their specific surface area ∼80 m2/g mesoporous structure average pore size 5.6 nm. chemiresistive sensor shows promising results toward H2 at 80 °C under 9 V bias 365 UV light exceptional response (4.1 for 0.1% ∼88 1% H2), time 36 s 76 fast recovery (38 39 respectively). Even dark conditions, exhibits (2.3 ∼47 H2) 52 efficient (68 Additionally, wide range concentrations from 50 10,000 ppm can be detected both conditions. CH4 or CO2 does not affect response, NH3, NO2, acetone only marginally affects response. influence humidity very low. remained stable three months. confirm that sensing establish benchmark field.

Язык: Английский

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Fe2P nanoparticle-decorated porous biochar for high-efficiency electrosynthesis of ammonia from toxic nitrite

Surfaces and Interfaces, Год журнала: 2023, Номер 38, С. 102818 - 102818

Опубликована: Март 23, 2023

Язык: Английский

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Investigating the impact of pretreatment strategies on photocatalyst for accurate CO2RR productivity quantification: A machine learning approach

Chemical Engineering Journal, Год журнала: 2023, Номер 473, С. 145255 - 145255

Опубликована: Авг. 6, 2023

Язык: Английский

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Silver Nanowires‐Based Flexible Gold Electrode Overcoming Interior Impedance of Nanomaterial Electrodes

Small, Год журнала: 2024, Номер 20(25)

Опубликована: Янв. 9, 2024

Abstract In the development of nanomaterial electrodes for improved electrocatalytic activity, much attention is paid to compositions, lattice, and surface morphologies. this study, a new concept enhance activity proposed by reducing impedance inside electrodes. Gold nanodendrites (AuNDs) are grown along silver nanowires (AgNWs) on flexible polydimethylsiloxane (PDMS) support. The AuNDs/AgNWs/PDMS electrode affords an oxidative peak current density 50 mA cm −2 ethanol electrooxidation, value ≈20 times higher than those in literature do. Electrochemical spectroscopy (EIS) demonstrates significant contribution AgNWs reduce impedance. densities electrooxidation decreased 7.5‐fold when electrolytically corroded. By situ surface‐enhanced Raman (SERS) functional theory (DFT) simulation, it validated that favors production acetic acid with undetectable CO, resulting more complete oxidation long‐term stability, while corrosion greatly decreases production. This novel strategy fabricating using as charge transfer conduit may stimulate insights into design

Язык: Английский

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Ultrathin Co_0.5NiS Nanosheets for Hydrazine Oxidation Assisted Nitrite Reduction

Advanced Functional Materials, Год журнала: 2023, Номер 34(8)

Опубликована: Ноя. 5, 2023

Abstract Nitrite (NO 2 − ) and hydrazine (N H 4 are common N‐pollutants in groundwater. The electrochemical method can realize the treatment of synthesis energy substance ammonia (NH 3 ). Designing synthesizing efficient electrocatalysts is great significance. Herein, ultrathin Co 0.5 NiS nanosheets attached on nickel foam (Co NiS‐NSs/NF) synthesized via cyanogel‐NaBH hydrolysis process succedent sulfurization approach. Owing to nanosheet structure interaction between Ni Co, NiS‐NSs/NF exhibits high activity for NO reduction reaction RR), which Faraday efficiency 92.2% NH yield 0.25 mmol h −1 cm −2 at −0.15 V potential. Meanwhile, also displays remarkable N oxidation KOH electrolyte. Therefore, a symmetrical NiS‐NSs/NF||Co electrolyzer assembled, only needs operating voltage 0.36 reach 10 mA ‐to‐NH conversion presence . This work reports promising strategy production small N‐pollutants.

Язык: Английский

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