• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>ACS Omega >Sol–Gel Synthesis of Ruthenium Oxide NanowiresTo Enhance Methanol Oxidation in Supported Platinum Nanoparticle Catalysts
【2h】

Sol–Gel Synthesis of Ruthenium Oxide NanowiresTo Enhance Methanol Oxidation in Supported Platinum Nanoparticle Catalysts

机译：溶胶-凝胶法合成氧化钌纳米线增强负载的铂纳米颗粒催化剂中的甲醇氧化

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A template-directed, sol–gel synthesis is utilized to produce crystalline RuO2 nanowires. Crystalline nanowires with a diameter of 128 ± 15 nm were synthesized after treating the nanowires at 600 °C in air. Analysis of these nanowires by X-ray powder diffraction revealed the major crystalline phase to be tetragonal RuO2 with a small quantity of metallic ruthenium present. Further analysis of the nanowire structures by high-resolution transmission electron microscopy reveals that they are polycrystalline and are composed of interconnected, highly crystalline, nanoparticles having an average size of ∼25 nm. Uniform 3 nm Pt nanoparticles were dispersed on the surface of RuO2 nanowires using an ambient, solution-based technique yielding a hybrid catalyst for methanol oxidation. Linear sweep voltammograms (LSVs) and chronoamperometry performed in the presence of methanol in an acidic electrolyte revealed a significant enhancement in the onset potential, mass activity, and long-term stability compared with analogous Pt nanoparticles supported on commerciallyavailable Vulcan XC-72R carbon nanoparticles. Formic acid oxidationLSVs and CO stripping voltammetry revealed that the RuO2-supported Pt nanoparticles exhibit significantly higher CO tolerance,which leads to higher catalytic stability over a period of severalhours. X-ray photoelectron spectroscopy results suggest that crystallineRuO2 leads to less-significant oxidation of the Pt surfacerelative to more widely studied hydrous RuO2 supports,thereby increasing catalytic performance.
机译：模板指导的溶胶-凝胶合成可用于生产晶体RuO2纳米线。在空气中于600°C处理纳米线后，合成了直径为128±15 nm的结晶纳米线。通过X射线粉末衍射对这些纳米线进行分析后发现，其主要结晶相为四方RuO2，其中存在少量的金属钌。通过高分辨率透射电子显微镜对纳米线结构的进一步分析表明，它们是多晶的，由相互连接的，高度结晶的纳米粒子组成，平均粒径约为25 nm。使用基于溶液的环境技术，将均匀的3 nm Pt纳米颗粒分散在RuO2纳米线的表面上，从而生成用于甲醇氧化的杂化催化剂。与在商业上支持的类似铂纳米粒子相比，在酸性电解液中存在甲醇的情况下进行的线性扫描伏安图（LSV）和计时电流法显示出显着增强的起始电势，质量活性和长期稳定性。可用Vulcan XC-72R碳纳米颗粒。甲酸氧化LSV和CO溶出伏安法表明，RuO2负载的Pt纳米颗粒表现出明显更高的CO耐受性，导致在数个时期内更高的催化稳定性小时。 X射线光电子能谱结果表明结晶RuO2导致Pt表面的氧化程度不明显相对于更广泛研究的含水RuO2载体，从而提高催化性能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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