Microdeposition of metal and oxide structures using ultrashort laser pulses
Microdeposition of metal and oxide structures using ultrashort laser pulses
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DOI：
10.1007/s003390050717
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发表时间：
1998-02
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影响因子：
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通讯作者：
I. Zergioti;S. Mailis;N. Vainos;P. Papakonstantinou;C. Kalpouzos;C. Grigoropoulos;C. Fotakis
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文献类型：
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作者：
I. Zergioti;S. Mailis;N. Vainos;P. Papakonstantinou;C. Kalpouzos;C. Grigoropoulos;C. Fotakis
采用一种快速、环保的微波辅助多元醇法合成了还原氧化石墨烯/铂负载电催化剂(Pt/RGO)，促进了氧化石墨烯的同时还原和铂纳米晶的形成。通过甲醇的电氧化测试了该体系作为阳极材料的潜力。与商用碳载铂电催化剂相比，铂/RGO表现出了前所未有的抗CO中毒能力、高的电化学活性表面积和高的催化质量活性，分别提高了110%、134%和60%。我们发现，还原的氧化石墨烯上高浓度的氧官能团对邻近铂中心上的碳类物种的去除起着主要作用，这突显了石墨烯载体上的氧基团与铂纳米颗粒之间的协同作用。微波辅助合成铂/RGO为制备具有优异电催化活性和抗CO能力的电催化剂提供了一条新的途径，在能源相关应用中具有重要意义。
Reduced graphene oxide/platinum supported electrocatalysts (Pt/RGO) were synthesized by employing a fast and eco-friendly microwave-assisted polyol process, which facilitated the simultaneous reduction of graphene oxide and formation of Pt nanocrystals. This system was tested for potential use as an anode material through the electrooxidation of methanol. Compared to the commercial carbon-supported Pt electrocatalysts, the Pt/RGO showed an unprecedented CO poisoning tolerance, high electrochemical active surface area, and high catalytic mass activity for methanol oxidation reaction, demonstrated by increases of 110, 134, and 60%, respectively. We found that the high concentration of oxygen functional groups on reduced graphene oxide plays a major role on the removal of carbonaceous species on the adjacent Pt sites, underlining a synergetic effect between the oxygen moieties on graphene support and Pt nanoparticles. The present microwave assisted synthesis of Pt/RGO provides a new path to prepare electrocatalysts with excellent electrocatalytic activity and CO tolerance, which is of great significance in energy-related applications.