2D PtRhPb Mesoporous Nanosheets with Surface‐Clean Active Sites for Complete Ethanol Oxidation Electrocatalysis

Advanced Materials, Год журнала: 2024, Номер 36(35)

Опубликована: Июль 4, 2024

The development of active and selective metal electrocatalysts for complete ethanol oxidation reaction (EOR) into desired C1 products is extremely promising practical application direct fuel cells. Despite some encouraging achievements, their activity selectivity remain unsatisfactory. In this work, it reported that 2D PtRhPb mesoporous nanosheets (MNSs) with anisotropic structure surface-clean site perform perfectly EOR electrocatalysis in both three-electrode two-electrode systems. Different to the traditional routes, a etching strategy developed produce mesopores while retaining parent anisotropy quasi-single-crystalline without mesopore-forming surfactants. This method also allows general synthesis metals other compositions structures. When being performed alkaline electrocatalysis, best MNSs deliver remarkably high (7.8 A mg

Язык: Английский

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Engineering few-layer MoS2 and rGO heterostructure composites for high-performance supercapacitors

Advanced Composites and Hybrid Materials, Год журнала: 2025, Номер 8(1)

Опубликована: Янв. 7, 2025

Abstract Molybdenum disulfide (MoS 2 ) after the few-layer (FL) processing draws attention to its attractive characteristics, such as broadening interlayer spacing, increasing active sites, and promoting purity of metallic phase. Notwithstanding, poor stability easy aggregation FL-MoS limit potential for development in field electrochemistry. Herein, a nanocomposite between reduced graphene oxide (rGO) is successfully constructed via one-pot hydrothermal method. Furthermore, @rGO composite with stable structure obtained by regulating amount rGO. The excellent supercapacitor capacitances building heterostructure composites rGO are displayed, owing synergistic effects occurring heterostructure. optimal sample @rGO-2 possesses specific capacitance 346.1 F g −1 at 1 A rate ability 57.2%. Moreover, remains 99.1% 10,000 cyclic charges discharges. More importantly, theoretical calculations confirm source extra raise conductivity @rGO. Also, @rGO-2//AC flexible asymmetric device fabricated, which presents superior energy density power 84.31 µWh cm −2 700 µW , 51.42 3500 . This work verifies storage electrochemical application.

Язык: Английский

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Recent advances in platinum group metallenes: From synthesis to energy-related electrocatalytic application

Applied Catalysis B Environment and Energy, Год журнала: 2025, Номер unknown, С. 125041 - 125041

Опубликована: Янв. 1, 2025

Язык: Английский

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Undercoordinated Two-Dimensional Pt Nanoring Stabilized by a Ring-on-Sheet Nanoheterostructure for Highly Efficient Alkaline Hydrogen Evolution Reaction

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Фев. 12, 2025

Platinum (Pt) is a state-of-the-art electrocatalyst for green hydrogen production in alkaline electrolytes. The delicate design and fabrication of two-dimensional (2D) Pt nanocatalysts can significantly enhance atomic utilization efficiency, while further improving intrinsic catalytic performance by modulating the density surface active sites. However, high energy morphology complexity 2D nanostructures often result poor structural stability under working conditions. Here, we report synthesis ring-on-sheet nanoheterostructure featuring abundant low-coordination sites which defect-rich nanoring stabilized an ultrathin rhodium (Rh) support. Rh@Pt exhibits remarkably enhanced activity electrocatalytic evolution reaction media compared to defect-free core-shell nanoplates commercial Pt/C. This work provides new insights nanoheterostructures with efficient durable electrocatalysis.

Язык: Английский

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Cascade protection strategy for anchoring atomic FeN3 sites within defect-rich wood carbon aerogel for high-performance Zn-air batteries and versatile application

Chemical Engineering Journal, Год журнала: 2024, Номер unknown, С. 158551 - 158551

Опубликована: Дек. 1, 2024

Язык: Английский

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Tensile Strain and Interatomic Orbital Hybridization Effects Boost the Electrocatalytic Performance of Intermetallic Pd₃Pb Nanowires for Ethanol Electrooxidation^†

Chinese Journal of Chemistry, Год журнала: 2024, Номер 42(21), С. 2633 - 2640

Опубликована: Июль 10, 2024

Comprehensive Summary We present a strategy that effectively modulate the d‐band electronic structure of active center by strain effect and interatomic orbital hybridization. This efficiently promotes kinetic process ethanol oxidation reaction (EOR) in alkaline media. In intermetallic Pd 3 Pb nanowires, introduction not only causes lattice expansion but also achieves hybridization bonding with Pd. Such tensile can achieve co‐regulation Pd, which directly affects adsorption behavior intermediate on for EOR. Hence, nanowires demonstrate enhanced EOR activity anti‐poisoning ability against CO ads . Theoretical calculations show OH* low energy barrier oxidative dehydrogenation are keys to high stability nanowires.

Язык: Английский

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PtCu-a-SnO2 interface engineering on PtCu-SnO2 aerogels for ethanol oxidation electrocatalysis

Chemical Engineering Journal, Год журнала: 2024, Номер 499, С. 156321 - 156321

Опубликована: Окт. 2, 2024

Язык: Английский

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Electron Bridge Effect Induced by Oxygen‐Bridged Ga on PdMo Bimetallene Nanoribbons for Boosting Electrocatalytic Alkynol Semihydrogenation

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Июль 23, 2024

Abstract The utilization of green hydrogen sources in H 2 O for alkynols electrocatalytic semihydrogenation reaction (ESHR) at ambient temperature provides a promising pathway toward the sustainable conversion alkynols. However, it is still great challenge to construct specific interfacial structure adjust electronic Pd purpose altering strong adsorption with active enhance production alkenols. Here, atomically dispersed GaO x ‐PdMo bimetallene nanoribbons (GaO BNRs) via oxygen bridging Ga atoms designed surface PdMo BNRs 2‐methyl‐3‐butyn‐2‐ol (MBY) ESHR synthesis 2‐methyl‐3‐buten‐2‐ol (MBE). achieve excellent MBE selectivity (≈97.4%), Faraday efficiency (≈96.1%), and maintain long‐term stability. Density functional theory demonstrates that top electron‐enriched bottom electron‐deficient “pyramidal” interface bridge. unique can effectively activate weaken interaction between catalyst MBE, thus promoting generation. Moreover, electron bridge effect Ga‐O‐PdMo induce p‐d orbital hybridization lower d ‐band center modulating reactants adsorption. This work strategy improve performance by modulate distribution.

Язык: Английский

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Low-Coordinated Pd–Pb Sites in Porous Pd₃Pb Metallene Aerogels Promote Polyalcohol Electrochemical Oxidation

ACS Materials Letters, Год журнала: 2024, Номер 6(10), С. 4801 - 4809

Опубликована: Сен. 24, 2024

Язык: Английский

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Ultrathin Rh Nanosheets as a Catalyst for the Selective Hydrogenation of Phenol to Cyclohexanone

ACS Applied Nano Materials, Год журнала: 2025, Номер 8(2), С. 1091 - 1099

Опубликована: Янв. 2, 2025

The syntheses and catalytic application of two-dimensional (2D) metallic nanomaterials have attracted much attention due to their extraordinary physical, electronic, chemical, optical properties. Herein, well-defined large-size ultrathin Rh nanosheets with a thickness approximately 0.72 nm were successfully prepared by using one step solvothermal method at 180 °C for 4 h Rh(acac)3 as precursor, water solvent, EDTA·2Na stabilizer, HCHO both reducing agent shape-controlling agent. formation the was dependent upon well selective adsorption CO, which originated from decomposition during reaction process, on (111) facets nucleus. as-synthesized exhibited excellent activity high selectivity cyclohexanone in hydrogenation phenol. 100% conversion phenol 79.74% achieved over 0.5 MPa H2 pressure room temperature within 1.5 h. These results provide synthesis strategy precious metal applications.

Язык: Английский

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