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首页> 外文期刊>Physica, B. Condensed Matter >The electrochemical hydrogen storage of multi-walled carbon nanotubes synthesized by chemical vapor deposition using a lanthanum nickel hydrogen storage alloy as catalyst
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The electrochemical hydrogen storage of multi-walled carbon nanotubes synthesized by chemical vapor deposition using a lanthanum nickel hydrogen storage alloy as catalyst

机译：以镧镍储氢合金为催化剂，通过化学气相沉积法合成多壁碳纳米管的电化学储氢

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摘要

The electrochemical hydrogen storage of multi-walled carbon nanotubes (MWNTs) has been investigated. The MWNTs were synthesized by chemical vapor deposition using a lanthanum nickel alloy as catalyst in a C2H2/H-2 atmosphere. The purified MWNTs have a high hydrogen storage capacity of 380 mAh/g under a condition of 200 mA/g charging current density and 100 mA/g discharging current density. The discharging curve has an approximate voltage plateau of 0.8 V. The discharging capacity is increased as the number of cycles rises from 1 to 41. These curves showed a good and stable charging/discharging performance of CNTs. We have also investigated the effect of the weight ratio of carbon nanotubes (CNTs) to Ni on the discharging capacity of CNTs-Ni electrodes, and found that the optimum ratio is 1:9 in our experimental range. Furthermore, the polarization behavior of CNTs was studied, which exhibited that CNTs using lanthanum nickel alloy as catalyst have better electrochemical activation. (C) 2004 Elsevier B.V. All rights reserved.
机译：已经研究了多壁碳纳米管（MWNT）的电化学储氢。通过在C2H2 / H-2气氛中使用镧镍合金作为催化剂，通过化学气相沉积法合成MWNT。在200mA / g的充电电流密度和100mA / g的放电电流密度的条件下，纯化的MWNT具有380mAh / g的高储氢容量。放电曲线具有大约0.8 V的电压平稳段。随着循环数从1增加到41，放电容量增加。这些曲线显示了CNT的良好且稳定的充电/放电性能。我们还研究了碳纳米管与镍的重量比对碳纳米管-镍电极放电容量的影响，发现在我们的实验范围内，最佳比例为1：9。此外，研究了碳纳米管的极化行为，结果表明以镧镍合金为催化剂的碳纳米管具有更好的电化学活化性能。 （C）2004 Elsevier B.V.保留所有权利。

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