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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >2D surface induced self-assembly of Pd nanocrystals into nanostrings for enhanced formic acid electrooxidation
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2D surface induced self-assembly of Pd nanocrystals into nanostrings for enhanced formic acid electrooxidation

机译：2D表面诱导Pd纳米晶体的自组装成纳米晶体，用于增强甲酸电氧化

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摘要

Two-dimensional (2D) graphene has been widely used as an ideal substrate for many functional materials. It is crucial to understand and control the growth of metal nanocrystals on the graphene surface. Herein we report a novel phenomenon that pre-synthesized palladium nanoparticles are spontaneously transformed into palladium nanostrings (Pd NSs) with nanoscale grain boundaries induced by the reduction of a graphene oxide substrate. A systematic study has been performed to explore the formation mechanism of Pd NSs, where the surface chemistry of 2D graphene is found to be the key factor. More importantly, these Pd NSs exhibit significantly enhanced stability and are among the most active catalysts for formic acid oxidation. Density-functional theory investigation further unravels that the formation of grain boundaries weakens the adsorption of formate and facilitates its subsequent oxidation.
机译：二维（2D）石墨烯已广泛用作许多功能材料的理想基底。 对石墨烯表面上的金属纳米晶体的生长至关重要。 在本文中，我们报告了一种新的现象，使得预合成的钯纳米颗粒自发地转化成钯纳米氧化物（Pd NSS），纳米级晶界通过还原氧化物衬底诱导。 已经进行了系统研究以探索PD NSS的形成机制，其中发现2D石墨烯的表面化学是关键因素。 更重要的是，这些PD NSS表现出显着增强的稳定性，并且是最活性的甲酸氧化催化剂之一。 密度功能理论调查进一步解释，晶界的形成削弱了甲酸盐的吸附，并促进其随后的氧化。

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    Zhang Sheng; Xia Rong; Su Yaqiong; Zou Yichao; Hu Chengyi; Yin Geping; Hensen Emiel J. M.; Ma Xinbin; Lin Yuehe;

  • 作者单位

    Tianjin Univ Collaborat Innovat Ctr Chem Sci &

    Engn Sch Chem Engn &

    Technol Key Lab Green Chem Technol Minist Educ Tianjin 300072 Peoples R China;

    Tianjin Univ Collaborat Innovat Ctr Chem Sci &

    Engn Sch Chem Engn &

    Technol Key Lab Green Chem Technol Minist Educ Tianjin 300072 Peoples R China;

    Eindhoven Univ Technol Dept Chem Engn &

    Chem Lab Inorgan Mat &

    Catalysis POB 513 NL-5600 MB Eindhoven Netherlands;

    Univ Manchester Sch Mat Manchester M13 9PL Lancs England;

    Xiamen Univ Coll Chem &

    Chem Engn iChEM Xiamen 361005 Peoples R China;

    Harbin Inst Technol Sch Chem &

    Chem Engn State Key Lab Urban Water Resource &

    Environm Harbin 150001 Peoples R China;

    Eindhoven Univ Technol Dept Chem Engn &

    Chem Lab Inorgan Mat &

    Catalysis POB 513 NL-5600 MB Eindhoven Netherlands;

    Tianjin Univ Collaborat Innovat Ctr Chem Sci &

    Engn Sch Chem Engn &

    Technol Key Lab Green Chem Technol Minist Educ Tianjin 300072 Peoples R China;

    Washington State Univ Sch Mech &

    Mat Engn Pullman WA 99164 USA;

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  • 正文语种 eng
  • 中图分类 工程材料学;
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