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首页> 外文期刊>Journal of Materials Science >Effective size-controlled synthesis and electrochemical characterization of ordered Pt nanopattern arrays from self-assembling block copolymer template
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Effective size-controlled synthesis and electrochemical characterization of ordered Pt nanopattern arrays from self-assembling block copolymer template

机译：自组装嵌段共聚物模板有效尺寸控制的合成和有序PT纳米透明图案阵列的有效尺寸控制合成及电化学表征

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摘要

This work offers an effective size-controlled synthesis of platinum nanoparticle (Pt NP) arrays for electrocatalyst through self-assembled nanopatterns of block copolymers on titanium (Ti) wafers. Size, spacing and uniformity of Pt NP with loading of Pt to a minimum were investigated to be controlled and adjusted in order to improve the electrochemically active surface area (ECSA) and ECSA stability, and Pt concentration in copolymer/chloroplatinic acid (H2PtCl6) solution was verified to be one of the most important factors to control the arrays' structure. In our case, the Pt NPs with predictable size of 5-16.5 nm could be obtained when the Pt concentration is larger than 0.05 mg ml(-1), which the dominant diameter is proved to be proportional to one-third power of the Pt concentration according to the linear relation of templates' Pt/N mass ratio versus Pt concentration, and the Pt NPs remain highly ordered arrays with predictable spacing when the Pt concentration is larger than 0.125 mg ml(-1). Decrease in Pt concentration from 2 to 0.125 mg ml(-1) is an effective method to improve the ECSA and durability simultaneously. The Pt NP arrays exhibit not only a remarkable initial ECSA value of 106.2 m(2) g(-1), but also a pseudo-zero particle aggregation possibility during 3000-cycle voltammetry, which is attributed to the high Pt NP dispersion and the ordered arrays that improve the Pt utilization and lower the possibility of aggregation.
机译：本作品提供了通过在钛（Ti）晶片上的嵌段共聚物的自组装纳米透物图来提供有效尺寸控制的铂纳米粒子（Pt NP）阵列的铂纳米粒子阵列。研究了Pt NP的尺寸，间距和均匀性，以控制和调整Pt至最小值，以便改善电化学活性表面积（ECSA）和ECSA稳定性，以及共聚物/氯铂酸（H2PTCL6）溶液中的PT浓度被验证成为控制阵列结构的最重要因素之一。在我们的情况下，当Pt浓度大于0.05mg ml（-1）时，可以获得可预测尺寸为5-16.5nm的Pt NPS，其主要直径被证明是与PT的三分之一的电源成比例浓度根据模板的线性关系'Pt / n质量比对Pt浓度，并且当Pt浓度大于0.125mg（-1）时，Pt NPS保持高度有序的阵列，可预测间隔。从2至0.125mg ml（-1）的Pt浓度的降低是同时改善ECSA和耐久性的有效方法。 Pt NP阵列不仅具有106.2μm（2 )g（-1）的显着初始ECSA值，而且在3000周期伏安期间也是伪零颗粒聚集的可能性，其归因于高PT NP色散和有序阵列，提高PT利用率并降低聚合的可能性。

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  • 来源
    《Journal of Materials Science》 |2018年第6期|共14页
  • 作者

    Gan Yuan; Wang Zhi-da; Shi Yan; Guo Chang-qing; Tan Hong-yi; Yan Chang-feng;

  • 作者单位

    Chinese Acad Sci Guangzhou Inst Energy Convers Hydrogen Prod &

    Utilizat Lab Key Lab Renewable Energy Guangzhou 510640 Guangdong Peoples R China;

    Chinese Acad Sci Guangzhou Inst Energy Convers Hydrogen Prod &

    Utilizat Lab Key Lab Renewable Energy Guangzhou 510640 Guangdong Peoples R China;

    Chinese Acad Sci Guangzhou Inst Energy Convers Hydrogen Prod &

    Utilizat Lab Key Lab Renewable Energy Guangzhou 510640 Guangdong Peoples R China;

    Chinese Acad Sci Guangzhou Inst Energy Convers Hydrogen Prod &

    Utilizat Lab Key Lab Renewable Energy Guangzhou 510640 Guangdong Peoples R China;

    Chinese Acad Sci Guangzhou Inst Energy Convers Hydrogen Prod &

    Utilizat Lab Key Lab Renewable Energy Guangzhou 510640 Guangdong Peoples R China;

    Chinese Acad Sci Guangzhou Inst Energy Convers Hydrogen Prod &

    Utilizat Lab Key Lab Renewable Energy Guangzhou 510640 Guangdong Peoples R China;

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  • 正文语种 eng
  • 中图分类 工程材料学;
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