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

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

{"title":"Enhancing Ethanol Electrooxidation in Acidic Media Using Pt Nanoparticles Supported on Metal Oxide-Modified Vulcan XC72 Nanocomposites","authors":"Rakan M. Altarawneh","doi":"10.1021/acs.langmuir.5c00838","DOIUrl":null,"url":null,"abstract":"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.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"253 1","pages":""},"PeriodicalIF":3.9000,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Langmuir","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1021/acs.langmuir.5c00838","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

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.

Abstract Image

查看原文本刊更多论文

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

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。

求助全文

约1分钟内获得全文求助全文

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).