首页> 外文期刊>RSC Advances >Gold micromeshes as highly active electrocatalysts for methanol oxidation reaction
【24h】

Gold micromeshes as highly active electrocatalysts for methanol oxidation reaction

机译:金微网用作甲醇氧化反应的高活性电催化剂

获取原文
           

摘要

A high density of surface defects is a key factor for efficient nanoscale gold (Au) electrocatalysts for the oxidation of small organic molecules. Here we present tunable pore size Au micromeshes with a high density of steps, kinks, twin boundaries, and stacking faults fabricated by using a template method. Electrocatalytic measurements on the methanol oxidation reaction show that the peak current density (normalized to the electrochemical surface area) of our Au mesh in alkaline electrolyte (0.5 M KOH) can reach 0.264 mA cm?2, which is significantly higher than those of the well-studied nanoporous Au film (0.081 mA cm?2) and nanoporous Au nanoparticles (0.112 mA cm?2). Over 90% of the current density can be maintained after 500 cycling tests. Through transmission electron microscopy studies, the superior intrinsic activity and stability lie in the high linear density of surface defects, the exposure of active facets, and superficial tensile strain on the outter-most layers.
机译:表面缺陷的高密度是有效的纳米金(Au)电催化剂用于氧化有机小分子的关键因素。在这里,我们介绍了可调谐孔径的Au微网,它们具有高密度的阶跃,扭结,孪晶边界和使用模板方法制造的堆叠缺陷。对甲醇氧化反应的电催化测量表明,在碱性电解质(0.5 M KOH)中我们的金网的峰值电流密度(标准化为电化学表面积)可以达到0.264 mA cm ?2 ,远远高于经过深入研究的纳米多孔Au薄膜(0.081 mA cm ?2 )和纳米多孔Au纳米颗粒(0.112 mA cm ?2 )。经过500次循环测试后,可以保持90%以上的电流密度。通过透射电子显微镜研究,卓越的固有活性和稳定性在于表面缺陷的高线密度,活性小面的暴露以及最外层的表面拉伸应变。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号