| Ni/AC电催化剂在中性溶液中的析氢电催化性能 |
| Electro-catalytic Behavior of Ni/AC Electro-catalyst for Hydrogen Evolution in Neutral Medium |
|
| 摘要: |
| 关键词: Ni/AC电催化剂 中性溶液 析氢 |
| 基金项目: |
| Abstract: The Ni/active carbon (AC) electro-catalyst was prepared by chemical reduction method using coconut carbon as the support. Morphologies and structures of Ni/AC were measured and characterized by X-ray diffraction and scanning electron microscopy. The activity of the Ni/AC membrane electrodes were studied in the neutral electrolyte using Tafel polarization curves and electrochemical impedance spectroscopy (EIS). The results showed that the average size of nickel particles on the active carbon were in nano-size range. The exchange current density of hydrogen evolution reaction (HER) of Ni/AC electro-catalysts was seventy-five times more than pure nickel, so Ni/AC electro-catalysts had better electro-catalytic activity. In 1 mol·L-1 NaCl electrolyte, the Tafelian behavior′s hydrogen evolution reaction (HER) of Ni/AC electro-catalyst at high over-potential existed in two Tefal regions. These two regions were named as “regionⅠ:0.318～0.456 V” and “regionⅡ: 0.120～0.288 V”. The rate step of regionⅠ was electron transference step. The rate step of region Ⅱ was concentration polarization. |
| Keywords: Ni/AC electro-catalyst neutral electrolyte hydrogen evolution |
| |
| 摘要点击次数: 1729 |
| 全文下载次数: 2196 |
| 张林森,王为,李振亚.Ni/AC电催化剂在中性溶液中的析氢电催化性能[J].无机化学学报,2006,22(7):1312-1316. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
