三维纳米多孔金属的晶面调控及表面催化特性研究

本项目拟采用脱合金法制备纳米多孔金属材料，在此基础上结合溶液化学、电化学等方法对其实施表面结构调控。通过诱导表面原子的扩散与重构，实现具有特征晶面暴露的纳米多孔金属材料的控制合成，使其兼具高比表面、高催化活性、高导电性和高稳定性。研究在调控过程中，纳米多孔金属表面结构的演变规律；建立有效的评价体系对具有特征暴露晶面的宏观尺度纳米多孔金属进行评价；探索既能保持所需的暴露晶面又能去除晶面导向剂的有效方法；进而研究特征晶面暴露的纳米多孔金属及相关复合纳米结构的新颖催化和电催化特性。此项研究的开展对于丰富和完善脱合金法制备多孔金属理论，开发高性能纳米催化及电催化材料，具有重要的科学价值和现实意义。

This project proposes to fabricate nanoporous metal electrodes with well defined surface structures. Based on a combination of dealloying, chemical modification, and electrochemical treatments, we aim at the realization of monolithic nanostructures with distinct crystal facets exposed in all three dimensions. In this way, the prepared nanoporous metal electrodes will possess large specific surface area, high catalytic properties, high conductivity and high stability. During this project, efforts will be focused on the regulation of the surface structure, establishing a precise assessment method for the quality of 3D nanoporous materials and a method to remove the surface-directing agents while maintaining the surface crystal facets. This project will greatly improve the understanding of the dealloying process and propel the fabrication for nanoporous metal electrode materials possessing well defined crystal facets.