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首页> 外文期刊>Catalysis science & technology >Reduced graphene oxide and MoP composite as highly efficient and durable electrocatalyst for hydrogen evolution in both acidic and alkaline media
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Reduced graphene oxide and MoP composite as highly efficient and durable electrocatalyst for hydrogen evolution in both acidic and alkaline media

机译:减少氧化石墨烯和拖把复合是高度高效、耐用electrocatalyst酸性和碱性氢进化媒体

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摘要

Materials based on earth-abundant elements can be developed for hydrogen evolution reactions to meet the future demand for eco-friendly and renewable energy sources based on hydrogen. MoP nanoparticle assemblies in composite with reduced graphene oxide (rGO) have been introduced with superior electrocatalytic performances in hydrogen generation from both acidic and alkaline media. The composite drives HER with a current density similar to 210 mA cm(-2) at a potential of 400 mV vs. RHE and requires only similar to 80-90 mV to start hydrogen evolution in both media. This composite remains stable and durable for hydrogen evolution in an acidic medium after 20 hours of chrono-potentiometric studies at a current density of 100 mA cm(-2). Electrochemical hydrogen evolution studies show that an rGO based composite synthesized by an aniline complexation method exhibits higher catalytic efficiency than a composite synthesized by the citric acid complexation method. Detailed mechanistic investigations in both acidic and alkaline media have been carried out using impedance spectroscopy and the Tafel slope.
机译:材料可以根据地球上充足的元素开发氢进化反应满足环保和未来需求基于氢的可再生能源。在复合纳米颗粒组装减少介绍了氧化石墨烯(rGO)electrocatalytic优越表现氢生成酸性和碱性媒体。密度与210 mA厘米(2)的潜力400 mV和流值,只需要类似80 - 90 mV氢进化的开始媒体。氢进化在酸性介质20小时的chrono-potentiometric研究100毫安的电流密度厘米(2)。氢进化研究表明,基于rGO复合材料合成苯胺的络合方法表现出较高的催化效率复合合成柠檬酸络合的方法。调查在酸性和碱性介质进行了使用阻抗光谱学和塔菲尔的斜率。

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