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CARBON-SUPPORTED COSE2 NANOPARTICLES FOR OXYGEN REDUCTION AND HYDROGEN EVOLUTION IN ACIDIC ENVIRONMENTS
CARBON-SUPPORTED COSE2 NANOPARTICLES FOR OXYGEN REDUCTION AND HYDROGEN EVOLUTION IN ACIDIC ENVIRONMENTS
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机译:碳支持的COSE2纳米粒子在酸性环境中的减氧和释氢
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摘要
The present teachings are directed to preparation of carbon-supported CoSe2 nanoparticles via an in situ surfactant free method, and use of the same for oxygen reduction and hydrogen evolution reactions. The CoSe2 nanoparticles have two kinds of structure after heat treatment at different temperatures: orthorhombic at 300°C and cubic at 400°C. The latter structure has higher oxygen reduction activity and hydrogen evolution activity than the former in 0.5 M H2SO4. Electron transfers of about 3.5- and about 3.7-electrons were observed for 20 wt.% CoSe2/C nanoparticles, after heat treatment at 300°C and 400°C, per oxygen molecule during the oxygen reduction process, respectively.
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机译:本教导针对通过原位不含表面活性剂的方法制备碳负载的CoSe 2纳米颗粒,并将其用于氧还原和氢释放反应。在不同温度下热处理后,CoSe2纳米颗粒具有两种结构:300°C的正交晶和400°C的立方晶。在0.5 M H2SO4中,后一种结构比前一种结构具有更高的氧还原活性和析氢活性。在氧还原过程中,对于每个氧分子,分别在300℃和400℃下热处理后,对于20重量%的CoSe 2 / C纳米颗粒,分别观察到约3.5电子和约3.7电子的电子转移。
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