2H‐Au Nanosheet‐Templated Growth of PdFe for Electrocatalytic Methanol Oxidation

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 10, 2024

Abstract Pd‐based alloy nanomaterials normally crystallize in the conventional face‐centered cubic (fcc) crystal phase. Here, 2H‐Au nanosheets (NSs), possessing 2H phase (2H: hexagonal close‐packed with a stacking sequence of “AB”), are used as templates for growth PdFe, during which 2H‐to‐fcc transformation Au NSs happens, leading to formation 2H/fcc Au@PdFe core–shell NSs. By changing Pd/Fe atomic ratio, ratio can be tuned accordingly. As proof‐of‐concept application, as‐synthesized Au@Pd 0.66 Fe 0.34 an electrocatalyst methanol oxidation reaction (MOR) alkaline media, exhibiting remarkable mass activity 4.39 A mg −1 Pd , is 1.7, 5.4 and 12.9 times that 0.56 0.44 (2.57 ), 0.40 0.60 (0.81 black (0.34 respectively, placing it among best reported MOR electrocatalysts. This strategy, based on engineering (PEN), paves efficient way rational design controlled synthesis noble multimetallic nanostructures unconventional phases exploring phase‐dependent properties applications.

Язык: Английский

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Characteristics of zeolitic imidazolate framework-L and application of its derivatives in oxygen evolution reaction: Recent trends

Journal of Alloys and Compounds, Год журнала: 2024, Номер 1006, С. 176293 - 176293

Опубликована: Сен. 3, 2024

Язык: Английский

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Modification dx2−y2${{d}_{{{x}^2} - {{y}^2}}}$ Orbital Electronic States in Nickel‐Based Hydroxides Via Cobalt/Iron Co‐Doping for High‐Efficiency Methanol Electrooxidation

Small, Год журнала: 2024, Номер unknown

Опубликована: Окт. 6, 2024

Abstract The nickel hydroxide‐based (Ni(OH) 2 ) methanol‐to‐formate electrooxidation reaction (MOR) performance is greatly related to the orbital electronic states. Hence, optimizing states achieve enhanced MOR activities are highly desired. Here, cobalt (Co) and iron (Fe) doping used modify Although both dopants can broaden orbital; however, Co leads an elevation in energy level of highest occupied crystal (HOCO), whereas Fe results its reduction. Such a discrepancy regulation stems from disparate partial electron transfer mechanisms amongst these transition metal ions, which possess distinct occupancy d orbitals. Motivated by this finding, NiCoFe hydroxide prepared exhibited excellent performance. showed that effectively suppress Ni Fe, combined with broadening induced NiO 6 octahedra distortion, endowing high HOCO broad orbital. It believed work gives in‐depth understanding on Ni(OH) , beneficial for designing ‐based catalysts

Язык: Английский

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Graphene Chainmail‐Enabled Moderate Precatalyst Phase Evolution for Sustainable Polysulfide Electrocatalysis in Li─S Batteries

Small, Год журнала: 2024, Номер unknown

Опубликована: Окт. 10, 2024

The rational design of polysulfide electrocatalysts is vital importance to achieve longevous Li─S batteries. Notwithstanding fruitful advances made in elevating electrocatalytic activity, efforts regulate precatalyst phase evolution and protect active sites are still lacking. Herein, an situ graphene-encapsulated bimetallic model catalyst (CoNi@G) developed for striking a balance between activity stability sulfur electrochemistry. layer numbers directly grown graphene can be dictated by tuning the synthetic duration. Exhaustive experimental theoretical analysis comprehensively reveals that tailored chainmail boosts catalytic durability while guaranteeing moderate evolution, accordingly attaining decorated surface sulfidation with advanced essence. Benefiting from sustainable electrocatalysis, CoNi@G enabled electrodes harvest capacity output 1276.2 mAh g

Язык: Английский

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Introducing yttrium into Pt-based intermetallic compounds induce electron perturbation and anti-oxidation for enhancing oxygen reduction activity and durability

Chemical Engineering Journal, Год журнала: 2024, Номер 501, С. 157849 - 157849

Опубликована: Ноя. 21, 2024

Язык: Английский

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Surface Ammonium Ions Assisted Decoration of Monodisperse Cobalt Nanoparticles on Molybdenum Oxide Films as Efficient Electrocatalysts for Hydrogen Evolution Reaction

Langmuir, Год журнала: 2024, Номер 40(33), С. 17559 - 17567

Опубликована: Авг. 6, 2024

The high expense associated with electrocatalysts poses a challenge to the advancement of hydrogen-based energy economy. utilization nonprecious metal-based that are easily prepared and cost-effective is imperative for future sustainability hydrogen society. semiconductive MoO

Язык: Английский

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Construction of Ni3S2/NiFe LDH heterostructure as bifunctional catalyst for energy-saving hydrogen evolution and co-production of value-added formate from glycerol electrolysis

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 88, С. 190 - 198

Опубликована: Сен. 19, 2024

Язык: Английский

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A CO2-emission Free Direct Methanol Fuel Cell for Simultaneous Production of Electrical Energy and Value-added Chemicals

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер unknown, С. 124643 - 124643

Опубликована: Сен. 1, 2024

Язык: Английский

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Ultrathin nickel sulfide nanosheets for sulfur ion electrooxidation assisted acetonitrile electroreduction

Science China Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 12, 2024

Язык: Английский

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Low-Pt coupled with atomic Ni-N5 doped carbon dots as efficient ORR/HER bifunctional catalyst

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 100, С. 378 - 387

Опубликована: Дек. 24, 2024

Язык: Английский

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