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首页> 外文期刊>Journal of Applied Electrochemistry >Nanoparticles produced by borohydride reduction as precursors for metal hydride electrodes
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Nanoparticles produced by borohydride reduction as precursors for metal hydride electrodes

机译：通过硼氢化物还原制得的纳米粒子作为金属氢化物电极的前体

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摘要

The performance of electrodes, prepared from amorphous Co sub x B sub y H sub z nanoparticles without additives, in 20% KOH solution was tested by means of cyclic voltammetry and chronopotentiometry. Peaks, assigned to hydrogen adsorption and desorption, are observed in the cyclic voltammograms. After charging, hydrogen atoms occupy different types of sites in the substrate, from which electrochemical desorption occurs. An increase in hydrogen content as a result of repeated cycling was established. Discharge capacity of the electrodes, estimated from the chronopotentiometric discharge curves obtained, is about 250 mA hg exp -1 . The observed changes in hydrogen and boron content, due to electrochemical treatment, indicate that the electrode material is an active participant in the whole electrochemical process. Hypotheses for the reaction mechanism are proposed.
机译：通过循环伏安法和计时电位法测试了由无添加剂的无定形Co sub x B sub y H sub z纳米粒子制备的电极在20％KOH溶液中的性能。在循环伏安图中观察到分配给氢吸附和解吸的峰。充电后，氢原子占据了基材中不同类型的位点，从中发生了电化学脱附。由于重复循环，氢含量增加。根据获得的计时电位放电曲线估算的电极放电容量约为250 mA hg exp -1。由于电化学处理，观察到的氢和硼含量的变化表明，电极材料是整个电化学过程的积极参与者。提出了反应机理的假设。

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