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Synthesis and Electrocatalytic Properties of Ni-Fe-Layered Double Hydroxide Nanomaterials

机译:Ni-Fe层双氢氧化物纳米材料的合成与电催化性能

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Designing efficient electrocatalysts for oxygen evolution reaction (OER) is very important for renewable energy storage. Layered double hydroxides (LDHs) attract widespread attention because of their excellent performance in electrochemical oxygen evolution. In this paper, the layered catalyst materials with different ratio of Ni and Fe were synthesized by one-pot hydrothermal synthesis technique. It was found that the Ni-Fe-layered double hydroxides with a ratio of 3:1 had a higher catalytic activity for oxygen evolution with an overpotential of 366 mV and a Tafel slope of 38.34 mV dec~(-1). The Ni-Fe compound with the ratio of 3:1 hold a higher electrical conductivity when the Ni-Fe LDH was calcinated at 600°C and nitrogen protection conditions, resulting in a higher catalytic activity for oxygen evolution reactions. And its overpotential is 270 mV and the Tafel slope is 32.8 mV dec~(-1).
机译:设计高效电催化剂用于氧气进化反应(OER)对于可再生能量储存非常重要。层状双氢氧化物(LDHS)由于其在电化学氧气进化方面具有优异的性能,吸引了广泛的关注。本文通过单盆水热合成技术合成了具有不同Ni和Fe不同比例的分层催化剂材料。发现具有3:1的比例为3:1的Ni-Fe层双氢氧化物的氧化催化活性具有366mV的过电位和38.34mV Dec〜(-1)的Tafel斜率。当在600℃和氮保护条件下煅烧Ni-Fe LDH时,Ni-Fe化合物具有3:1的比例较高,导致氧化反应的催化活性较高。其过势是270 mV,Tafel斜率为32.8 mV Dec〜(-1)。

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