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首页> 外文期刊>Catalysis science & technology >Ultrafine Rh nanocrystals immobilized on 3D boron and nitrogen co-doped graphene–carbon nanotube networks: high-efficiency electrocatalysts towards the methanol oxidation reaction
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Ultrafine Rh nanocrystals immobilized on 3D boron and nitrogen co-doped graphene–carbon nanotube networks: high-efficiency electrocatalysts towards the methanol oxidation reaction

机译：超细Rh纳米晶固定在3D硼氮共掺杂石墨烯-碳纳米管网络上：用于甲醇氧化反应的高效电催化剂

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摘要

Rhodium (Rh)-based nanocrystals have been recently recognized as promising platinum (Pt)-alternative electrocatalysts for methanol oxidation due to their unique catalytic activity and strong anti-poisoning capacity in alkaline media. Here, the bottom-up fabrication of ultrafine Rh nanocrystals immobilized on three-dimensional (3D) porous boron and nitrogen co-doped graphene–carbon nanotube networks (Rh/BNG–CNT) is achieved through a facile and controllable self-assembly method. The as-derived 3D nanoarchitecture not only ensures a uniform Rh distribution for a large number of catalytically active centres, but also facilitates the transportation of external ions and electrons to the internal reactive sites, thereby affording rapid catalytic kinetics for the methanol oxidation reaction. As a consequence, the optimized Rh/BNG–CNT catalyst manifests extraordinary electrocatalytic methanol oxidation properties, such as a large electrochemically active surface area, high mass activity, and reliable long-term stability, far superior to those of traditional Rh/undoped graphene, Rh/carbon nanotubes, Rh/carbon black and the more widely used Pt/carbon black and Pd/carbon black catalysts.
机译：铑的纳米晶体最近认为是有前途的铂(Pt)替代对甲醇氧化由于electrocatalysts他们独特的催化活性和强在碱性介质防毒能力。超细Rh的自下而上的加工纳米晶体固定在三维(3 d)多孔co-doped硼和氮graphene-carbon纳米管网络(Rh / BNG-CNT)通过温和的和可控的自组装的方法。nanoarchitecture不仅确保统一的猕猴为大量催化地分布活跃的中心,但是也促进了外部离子和电子的运输内部反应网站,从而提供快速对甲醇催化动力学氧化反应。优化Rh / BNG-CNT催化剂体现非凡的electrocatalytic甲醇氧化的属性,如电化学原理活性表面积,高质量的活动,可靠的长期稳定,远优于传统的Rh /无掺杂的石墨烯,Rh /碳纳米管,Rh /炭黑和更多广泛使用Pt /炭黑和Pd /炭黑催化剂。

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