金属氧化物-改性Vulcan XC72纳米复合材料负载Pt纳米颗粒增强酸性介质中乙醇的电氧化作用

IF 3.9 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Langmuir Pub Date : 2025-04-23 DOI:10.1021/acs.langmuir.5c00838

Rakan M. Altarawneh

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引用次数: 0

摘要

制备了基于Pt纳米颗粒（Pt NPs）沉积在各种碳质材料（炭黑- vulcan XC72，石墨烯和石墨）上的纳米复合电极材料，并对其在酸性介质中的乙醇电氧化反应（EOR）进行了评价。系统评价了金属氧化物（TiO2、SnO2、ZnO、Fe2NiO4、Fe2O3、CuFe2O4、ZnFe2O4和5% Ru）在Vulcan XC-72中煅烧和掺入对Pt NPs提高采收率性能的促进作用。Pt纳米粒子（约20 wt %）在室温下通过简单的NaBH4还原法合成，得到球状纳米粒子，团聚最小。物理化学表征（XRD， TEM和SEM）证实了Pt在煅烧Fe2O3-C载体上分散均匀，颗粒尺寸减小。电化学分析（CV、CA、LSV和EIS）表明，Pt/5% Fe2O3-C具有较低的起始电位（0.2 V vs Ag/AgCl）、较高的电流密度（0.52 mA/cm2）和较强的稳定性（3000 s后仍保持34%的活性）。双重焙烧（Pt沉积前/后）稳定了Fe2O3-C上的超小Pt NPs (3.09 nm)，其质量活性是Pt/C的2.3倍。性能的提高是由于协同电子效应、优化的pt -载体相互作用和fe2o3介导的C-C键裂解。这项工作强调了双热退火（Pt沉积前后）在稳定Pt NPs和推进DEFC催化剂设计方面的功效。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Enhancing Ethanol Electrooxidation in Acidic Media Using Pt Nanoparticles Supported on Metal Oxide-Modified Vulcan XC72 Nanocomposites

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Enhancing Ethanol Electrooxidation in Acidic Media Using Pt Nanoparticles Supported on Metal Oxide-Modified Vulcan XC72 Nanocomposites

Nanocomposite electrode materials based on Pt nanoparticles (Pt NPs) deposited on various carbonaceous materials (Carbon Black-Vulcan XC72, graphene, and graphite) were fabricated and evaluated for ethanol electrooxidation reaction (EOR) in acidic media. The promotional effects of calcination and incorporation of metal oxides (TiO₂, SnO₂, ZnO, Fe₂NiO₄, Fe₂O₃, CuFe₂O₄, ZnFe₂O₄, and 5% Ru on alumina) into Vulcan XC-72 on the performance of Pt NPs toward EOR were systematically evaluated. Pt NPs (∼20 wt %) were synthesized via a facile NaBH₄ reduction method at ambient temperature, yielding spherical nanoparticles with minimal agglomeration. Physicochemical characterization (XRD, TEM, and SEM) confirmed uniform Pt dispersion and reduced particle size on calcined Fe₂O₃–C supports. Electrochemical analysis (CV, CA, LSV, and EIS) revealed that calcined Pt/5% Fe₂O₃–C exhibited superior EOR activity, with a low onset potential (0.2 V vs Ag/AgCl), high current density (0.52 mA/cm²), and enhanced stability (retaining >34% activity after 3000 s). Dual calcination (pre/post-Pt deposition) stabilized ultrasmall Pt NPs (3.09 nm) on Fe₂O₃–C, achieving 2.3 times higher mass activity than Pt/C. The improved performance is attributed to synergistic electronic effects, optimized Pt-support interactions, and Fe₂O₃-mediated C–C bond cleavage. This work highlights the efficacy of dual thermal annealing (pre- and post-Pt deposition) in stabilizing Pt NPs and advancing DEFC catalyst design.

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来源期刊

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).