Construction of highly-stable graphene hollow nanospheres and their application in supporting Pt as effective catalysts for oxygen reduction reaction
Construction of highly-stable graphene hollow nanospheres and their application in supporting Pt as effective catalysts for oxygen reduction reaction
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高稳定性石墨烯纳米空心球的构建及其负载Pt作为氧还原反应有效催化剂的应用
DOI：
10.1016/j.gee.2018.12.002
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发表时间：
2019-07
影响因子：
13.3
通讯作者：
Tang Yawen
中科院分区：
文献类型：
--
作者：
Zhang Huaifang;Zhang Jubing;Liu Kunhao;Zhu Yunqi;Qiu Xiaoyu;Sun Dongmei;Tang Yawen
石墨烯三维结构的构建和表面改性是制备高性能石墨烯基复合材料的有效途径。本文基于石墨烯良好的形貌和高效的电子传导特性，采用牺牲模板法合成了三维高稳定性石墨烯空心纳米球。所制备的3D石墨烯纳米球表现出优异的上级机械稳定性、电化学稳定性和强疏水性，这可以在基于酸性介质的ORR中加速H2O的发射。因此，3D高度稳定的石墨烯纳米球用于在酸性介质中限制微小的Pt纳米颗粒（3D r-GO@Pt HNS）用于ORR，表现出具有4-电子转移途径的上级活性。同时，与商业Pt/C相比，在ORR质量活性和电化学表面积方面实现了显著改善的耐久性。
The construction and surface modification of three-dimensional (3D) graphene structures have been recognized as effective ways to prepare high-performance graphene-based composites in energy-related applications. Herein, on the basis of well-defined morphology and efficient electron conduction, the 3D highly-stable graphene hollow nanospheres have been synthesized by using sacrificial template method. The as-prepared 3D graphene nanospheres exhibit superior mechanical stability, electrochemical stability, and strong hydrophobicity, which may accelerate the emission of H2O in acidic medium-based ORR. Accordingly, the 3D highly-stable graphene nanospheres are used to confine tiny Pt nanoparticles (3D r-GO@Pt HNSs) for ORR in acidic medium, exhibiting superior activity with 4-electron-transfered pathway. Meanwhile, dramatically improved durability are achieved in terms of both ORR mass activity and electrochemically surface area compared to those of commercial Pt/C.
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