• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ACS nano >Identifying the Atomic-Level Effects of Metal Composition on the Structure and Catalytic Activity of Peptide-Templated Materials
【24h】

Identifying the Atomic-Level Effects of Metal Composition on the Structure and Catalytic Activity of Peptide-Templated Materials

机译：鉴定金属组成对肽模板材料的结构和催化活性的原子水平影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Bioinspired approaches for the formation of metallic nanomaterials have been extensively employed for a diverse range of applications including diagnostics and catalysis. These materials can often be used under sustainable conditions; however, it is challenging to control the material size, morphology, and composition simultaneously. Here we have employed the R5 peptide, which forms a 3D scaffold to direct the size and linear shape of bimetallic PdAu nanomaterials for catalysis. The materials were prepared at varying Pd:Au ratios to probe optimal compositions to achieve maximal catalytic efficiency. These materials were extensively characterized at the atomic level using transmission electron microscopy, extended X-ray absorption fine structure spectroscopy, and atomic pair distribution function analysis derived from high-energy X-ray diffraction patterns to provide highly resolved structural information. The results confirmed PdAu alloy formation, but also demonstrated that significant surface structural disorder was present. The catalytic activity of the materials was studied for olefin hydrogenation, which demonstrated enhanced reactivity from the bimetallic structures. These results present a pathway to the bioinspired production of multimetallic materials with enhanced properties, which can be assessed via a suite of characterization methods to fully ascertain structure/function relationships.
机译：生物启发性的金属纳米材料形成方法已被广泛用于包括诊断和催化在内的各种应用。这些材料通常可以在可持续条件下使用。但是，同时控制材料的尺寸，形态和组成是一项挑战。在这里，我们采用了R5肽，该肽形成3D支架以指导双金属PdAu纳米材料的尺寸和线性形状进行催化。以不同的Pd：Au比例制备材料，以探测最佳组成，以实现最大的催化效率。使用透射电子显微镜，扩展的X射线吸收精细结构光谱学和源自高能X射线衍射图的原子对分布函数分析对这些材料进行了广泛的原子级表征，以提供高度解析的结构信息。结果证实了PdAu合金的形成，但也表明存在明显的表面结构紊乱。研究了该材料对烯烃加氢的催化活性，这证明了双金属结构具有增强的反应性。这些结果为生物启发生产具有增强特性的多金属材料提供了途径，可以通过一套表征方法对其进行评估，以充分确定结构/功能关系。

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