Electrodeposited Co-Fe and Co-Fe-C Alloys for Hydrogen Evolution in a Hot 8 kmol m-3 NaOH Solution
Electrodeposited Co-Fe and Co-Fe-C Alloys for Hydrogen Evolution in a Hot 8 kmol m-3 NaOH Solution
复制标题
用于在热 8 kmol m-3 NaOH 溶液中析氢的电沉积 Co-Fe 和 Co-Fe-C 合金
DOI：
10.2320/matertrans.44.2350
复制
发表时间：
2003
影响因子：
1.2
通讯作者：
K. Hashimoto
中科院分区：
文献类型：
--
作者：
P. Żabiński;S. Meguro;K. Asami;K. Hashimoto
尝试通过电沉积来定制用于在热浓氢氧化钠溶液中析氢的活性钴合金阴极。通过形成含有不同铁含量的Co-Fe和Co-Fe-C合金来增强钴的电解析氢阴极活性。在Co-Fe合金中添加碳是为了增强电解析氢活性并防止在363 K、8 kmol m -3 NaOH中的开路腐蚀。Co-Fe合金电沉积的最佳条件是pH 4和硫酸铁浓度大于5 kg m -3 。在此条件下获得了以纳米晶bcc相为主、析氢活性最高的合金。添加碳减缓了热碱性溶液中开路腐蚀导致的铁优先溶解，但不能有效地完全防止开路腐蚀和增强析氢。
Tailoring of active cobalt alloy cathodes for hydrogen evolution in a hot concentrated sodium hydroxide solution was attempted by electrodeposition. Enhancement of cathodic activity of cobalt for electrolytic hydrogen evolution has been carried out by the formation of Co-Fe and Co-Fe-C alloys containing different content of iron. The carbon addition to Co-Fe alloys was made to enhance the electrolytic hydrogen evolution activity and to prevent open circuit corrosion in 8 kmol m -3 NaOH at 363 K. The best condition for electrodeposition of Co-Fe alloy was pH 4 and the iron sulfate concentration of more than 5 kg m -3 . Under this condition the alloy was obtained with nanocrystalline bcc phase as a dominant and with the highest hydrogen evolution activity. The carbon addition slowed down preferential iron dissolution by open circuit corrosion in the hot alkaline solution but was not effective in complete prevention of the open circuit corrosion and in enhancing the hydrogen evolution.