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首页> 外文期刊>RSC Advances >Synthesis of AuPd nanoparticle-decorated graphene-coated ZnO nanorod arrays with enhanced photoelectrochemical performance and stability
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Synthesis of AuPd nanoparticle-decorated graphene-coated ZnO nanorod arrays with enhanced photoelectrochemical performance and stability

机译：具有增强的光电化学性能和稳定性的AUPD纳米粒子装饰石墨烯涂层ZnO纳米杆阵列的合成

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摘要

AuPd nanoparticle-decorated graphene-coated ZnO nanorod (ZNR) array electrodes (ZNR@Gr/AuPd) were synthesized via electrostatic self-assembly followed by solution reduction methods. The morphologies of ZNR@Gr/AuPd were characterized with scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM), which indicated that ZNR was well-coated by graphene with 3-5 layers and uniformly decorated with AuPd nanoparticles (about 5 nm). UV-Vis diffuse reflectance and photoluminescence spectra were obtained to analyze the optical properties. The photoelectrochemical (PEC) properties were also evaluated; the results indicated that the photocurrent density was 2.27 mA cm(-2) at 0.8 V versus Ag/AgCl, which was 7.1 times that of bare ZNR. The sample also displayed enhanced PEC stability (91.3%), which prevented photocorrosion. Finally, a proposed PEC mechanism of ZNR@Gr/AuPd was illustrated to explain the charge transfer and the role of graphene and AuPd nanoparticles in the improvement of PEC performance and stability. The ZNR@Gr/AuPd electrode shows excellent PEC performance and stability, exhibiting promising potential in the generation of H-2.
机译：AUPD纳米粒子装饰的石墨烯涂覆的ZnO纳米棒（ZnR）阵列电极（ZnR @ GR / AUPD）通过静电自组装合成，然后通过溶液还原方法合成。用扫描电子显微镜（SEM），透射电子显微镜（SEM），透射电子显微镜（TEM）和原子力显微镜（AFM）的形态，表明ZnRE通过带3-5层的石墨烯涂覆良好涂覆用AUPD纳米粒子（约5nm）装饰。获得UV-VI扩散反射率和光致发光光谱以分析光学性质。还评估了光电化学（PEC）性质;结果表明，光电流密度为2.27mA cm（-2），与Ag / AgCl为0.8V，其为裸ZnR的7.1倍。样品还显示出增强的PEC稳定性（91.3％），防止了光腐蚀。最后，说明了ZnR @ GR / AUPD的提出的PEC机制，以解释石墨烯和AUPD纳米颗粒在改善PEC性能和稳定性方面的电荷转移和作用。 ZNR @ GR / AUPD电极显示出优异的PEC性能和稳定性，在H-2的产生中表现出有希望的潜力。

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  • 来源
    《RSC Advances》 |2019年第5期|共7页
  • 作者

    Zhang Yuzhi; Zhang Yunlong; Guo Yunfeng; Wu Lingnan; Liu Yangqiao; Song Lixing;

  • 作者单位

    Chinese Acad Sci Key Lab Inorgan Coating Mat CAS Shanghai Inst Ceram 1295 Dingxi Rd Shanghai 200050 Peoples R China;

    Chinese Acad Sci Key Lab Inorgan Coating Mat CAS Shanghai Inst Ceram 1295 Dingxi Rd Shanghai 200050 Peoples R China;

    Chinese Acad Sci Key Lab Inorgan Coating Mat CAS Shanghai Inst Ceram 1295 Dingxi Rd Shanghai 200050 Peoples R China;

    Chinese Acad Sci Key Lab Inorgan Coating Mat CAS Shanghai Inst Ceram 1295 Dingxi Rd Shanghai 200050 Peoples R China;

    Chinese Acad Sci Key Lab Inorgan Coating Mat CAS Shanghai Inst Ceram 1295 Dingxi Rd Shanghai 200050 Peoples R China;

    Chinese Acad Sci Key Lab Inorgan Coating Mat CAS Shanghai Inst Ceram 1295 Dingxi Rd Shanghai 200050 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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