金属纳米簇/石墨烯复合体系的可控制备及电催化性质研究

项目名称： 金属纳米簇/石墨烯复合体系的可控制备及电催化性质研究

项目编号： No.51272047

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 高燕

作者单位： 国家纳米科学中心

项目金额： 80万元

中文摘要： 贵金属纳米催化剂是目前燃料电池商业化的主要瓶颈之一。在提高催化剂活性和稳定性的同时降低材料成本，是目前亟待解决的关键科学技术问题。纳米金属催化剂的性能，一方面取决于金属纳米粒子的性质，另一方面载体也起着关键的作用。石墨烯作为性能优异的的二维纳米碳材料，有希望成为金属纳米催化剂的理想载体；但是如何实现石墨烯与金属纳米粒子的协同效应，依然是一个巨大的挑战。本项目拟采用氧化石墨烯、还原氧化石墨烯和掺杂石墨烯为载体原位还原金属纳米簇，催化氧气还原和甲醇氧化反应，通过调控石墨烯的性质以及金属纳米簇的尺寸、化学组成和微观结构，详细研究它们之间的协同效应对催化性能的影响，提高催化剂的活性、稳定性和选择性。申请者希望结合理论计算，在微观尺度上进一步深入认识金属纳米簇/石墨烯复合体系的分子吸附、能量转移和协同效应对催化机理的影响，探索石墨烯基金属纳米簇催化剂的普适性规律，为开发实用的燃料电池提供研究思路。

中文关键词： 纳米粒子；石墨烯；纳米杂化材料；微观结构；催化

英文摘要： Noble metal catalyst is currently one of the bottlenecks for commercialization of fuel cells. How to reduce the cost of the catalyst when enchancing its reactivity and stability is the demanding fundamental scientific and technical problem to be dissolved. On one hand,the performance of nanometal catalysts depends on the properties of metal nanoparticles; on the other hand, the support also plays an important role. Graphene, as a two-dimensional carbon nanomaterial with excellent properties, is highly prospected to be the perfect support to metal nanocatalyst. How to realize the synergistic effect between graphene and metal nanoparticles, however, remains a great challenge. In this project, the applicant would like to reduce metal nanoclusters in-situ utilizing three kinds of graphene support with distinct properties, i.e. graphene oxide, reduced graphene oxide and doped graphene. The catalytic performance of the metal nanocluster/graphene on oxygen reduction reaction and methanol oxidation reaction will be studied. By tailoring the size, chemical composition as well as the micro-structure of the metal nanoculsters, the influences of the synergestic effect between graphene and metal nanoculsters on the catalytic performance will be investigated thorouthly. It is hoped that combined with theoretical calculation,

英文关键词： nanoparticles；graphene；hybrid nanomaterial；nanostructures；catalysis