Hollow microstructural regulation of single-atom catalysts for optimized electrocatalytic performance

Zhou, A-Wu; Wang, Dingsheng; Li, Yadong

doi:10.20517/microstructures.2021.08

Cited by 13 publications

(10 citation statements)

References 105 publications

(135 reference statements)

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“…In the NH 3 concentration range of 10 ppb−0.15 v/v%, 1S-HoMS-BaTiO 3 exhibited a higher response than the other samples, which may be because hollow microstructures with thin shells offer enhanced expedited gas-transfer processes. 24 However, in the NH 3 concentration range of 0.15−0.55 v/v%, 2S-HoMS-BaTiO 3 exhibited a relatively high response, which can be attributed to the diffusion of gases into the interior of the hollow sphere through the mesoporous structure and loose shell. The gas diffusion resistance increases as the material transitions from a single-shelled hollow structure to a complex multishelled hollow structure.…”

Section: Resultsmentioning

confidence: 97%

Confinement Enrichment Effect in HoMS-BaTiO₃ Microwave Gas Sensors for the Detection of 10 ppb–0.55 v/v% Ammonia at Room Temperature

Xu,

Yang,

Wang

et al. 2024

ACS Sens.

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The construction of ammonia gas sensors with wide detection ranges is important for exhalation diagnosis and environmental pollution monitoring. To achieve a wide detection range, sensitive materials must possess excellent spatial confinement and large active surfaces to enhance gas adsorption. In this study, an ammonia microwave gas sensor with a wide detection range of 10 ppb−0.55 v/v% at room temperature was fabricated by incorporating hollow multishelled-structured BaTiO 3 (HoMS-BaTiO 3 ). The effect of the number of shells and the quantity of the sensitive material on the gas-sensing performance was investigated, and two-layered HoMS-BaTiO 3 demonstrated the best response at high concentrations (0.15−0.55 v/v%). Conversely, single-layered HoMS-BaTiO 3 displayed outstanding performance at low concentrations (10 ppb−0.15 v/v%). The lower the quantity of the sensitive material, the higher the response. This study offers a method for preparing room-temperature ammonia sensors with a wide detection range and reveals the link between the structure and quantity of sensitive materials and gas-sensing performance.

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Section: Resultsmentioning

confidence: 97%

Confinement Enrichment Effect in HoMS-BaTiO₃ Microwave Gas Sensors for the Detection of 10 ppb–0.55 v/v% Ammonia at Room Temperature

Xu,

Yang,

Wang

et al. 2024

ACS Sens.

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“…For example, while single-atom catalysis has generated burgeoning interest, Mo-based single-atom catalysts remain underexplored, representing a ripe field for future inquiry. 216 Additionally, research in high-entropy alloys, which have garnered attention for their energy conversion and storage potential, could offer innovative strategies for improving HER performance through synergistic atomic interactions. 217 (3) Developing novel synthesis methods of Mo-based electrocatalysts.…”

Section: Challenges and Perspectivesmentioning

confidence: 99%

“…Exploring new types of highly active catalytic sites or stimulating additional active sites using emerging technologies offers promising avenues. For example, while single-atom catalysis has generated burgeoning interest, Mo-based single-atom catalysts remain underexplored, representing a ripe field for future inquiry . Additionally, research in high-entropy alloys, which have garnered attention for their energy conversion and storage potential, could offer innovative strategies for improving HER performance through synergistic atomic interactions .…”

Section: Challenges and Perspectivesmentioning

confidence: 99%

Perspectives on Mo-Based Electrocatalysts for the Hydrogen Evolution Reaction: A Comprehensive Review

Li,

et al. 2023

Energy Fuels

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As the environment deteriorates, the urgency for new energy sources becomes evident. Hydrogen emerges as an ideal energy option due to its high energy density and clean nature, making it a promising candidate for future energy development. However, the process of producing hydrogen through water cracking remains a significant challenge, as it requires overcoming a substantial reaction barrier, demanding a large amount of energy. To address this issue, Mo-based composites as electrocatalysts present a viable solution. These composites offer several advantages, such as enhancing the efficiency of water cracking by reducing the reaction barrier and having a more affordable price compared to precious metals. This review comprehensively summarizes and examines various Mo and Mo-based composites with unique morphologies and structures as electrocatalysts for the hydrogen evolution reaction. The study delves into the relationship between material morphologies, preparation methods, elemental compositions, and electrocatalytic properties. Furthermore, the review explores the ongoing development and promising prospects of Mo-based composites in this field.

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“…From a societal and environmental point of view, the production of H 2 by electrolysis of water is an environmentally friendly process, but it still has some disadvantages. 1,2 There is a large amount of energy loss due to a significant overpotential, and approximately 90% of the electricity is lost through the oxygen evolution reaction (OER) at the anode. 3−5 Hence, the reasonable addition of easily oxidized organic molecules in the electrolyte to replace the OER is very promising.…”

Section: Introductionmentioning

confidence: 99%

Facile Construction of Ultrathin V-Doped NiSe₂/Ni₃Se₄/CuSe Nanosheets for Enhanced Urea-Assisted Electrochemical Hydrogen Production

Feng,

Du,

Jiang

et al. 2024

Energy Fuels

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Hydrogen production by electrolytic water is a green technology, which is conducive to alleviating the current severe energy and environmental crisis. However, it is affected by the high oxygen evolution reaction (OER) potential and has high energy consumption. Replacing the OER with the urea oxidation reaction (UOR) can reduce energy consumption. Herein, V-doped bimetallic selenides with an ultrathin nanosheet structure catalyst (V−NiSe 2 / Ni 3 Se 4 /CuSe/NF) are prepared via hydrothermal and low-temperature selenization. The catalyst has excellent UOR activity with a low potential of 1.33 V at 100 mA cm −2 and remarkable stability (120 h at 10 mA cm −2 ). Electrochemical measurements and characterization indicate that the abundant interface formed by NiSe 2 /Ni 3 Se 4 and CuSe can induce charge transfer, thereby improving the catalytic activity and stability of the electrode material. V doping promotes the formation of ultrathin nanosheets with folds, which favors expanding the catalyst's active site and the contact region between the catalyst and the electrolyte, thus improving the catalytic activity. In situ Raman measurement further proves that V doping is beneficial to the surface reconstruction of the catalyst and accelerates the reaction kinetics of UOR. This work offers a new idea for the preparation of highly active UOR electrodes.

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Hollow microstructural regulation of single-atom catalysts for optimized electrocatalytic performance

Cited by 13 publications

References 105 publications

Confinement Enrichment Effect in HoMS-BaTiO₃ Microwave Gas Sensors for the Detection of 10 ppb–0.55 v/v% Ammonia at Room Temperature

Confinement Enrichment Effect in HoMS-BaTiO₃ Microwave Gas Sensors for the Detection of 10 ppb–0.55 v/v% Ammonia at Room Temperature

Perspectives on Mo-Based Electrocatalysts for the Hydrogen Evolution Reaction: A Comprehensive Review

Facile Construction of Ultrathin V-Doped NiSe₂/Ni₃Se₄/CuSe Nanosheets for Enhanced Urea-Assisted Electrochemical Hydrogen Production

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Hollow microstructural regulation of single-atom catalysts for optimized electrocatalytic performance

Cited by 13 publications

References 105 publications

Confinement Enrichment Effect in HoMS-BaTiO3 Microwave Gas Sensors for the Detection of 10 ppb–0.55 v/v% Ammonia at Room Temperature

Confinement Enrichment Effect in HoMS-BaTiO3 Microwave Gas Sensors for the Detection of 10 ppb–0.55 v/v% Ammonia at Room Temperature

Perspectives on Mo-Based Electrocatalysts for the Hydrogen Evolution Reaction: A Comprehensive Review

Facile Construction of Ultrathin V-Doped NiSe2/Ni3Se4/CuSe Nanosheets for Enhanced Urea-Assisted Electrochemical Hydrogen Production

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Confinement Enrichment Effect in HoMS-BaTiO₃ Microwave Gas Sensors for the Detection of 10 ppb–0.55 v/v% Ammonia at Room Temperature

Confinement Enrichment Effect in HoMS-BaTiO₃ Microwave Gas Sensors for the Detection of 10 ppb–0.55 v/v% Ammonia at Room Temperature

Facile Construction of Ultrathin V-Doped NiSe₂/Ni₃Se₄/CuSe Nanosheets for Enhanced Urea-Assisted Electrochemical Hydrogen Production