摘要
用循环伏安法研究了在光谱纯石墨电极上原位电沉积活性镍对氢析出及苯乙酮的加氢还原作用。结果表明,当溶液中加入少量镍离子后,在石墨电极表面会连续沉积活性镍,从而能不断地催化苯乙酮的加氢还原,并大大增加氢析出和苯乙酮加氢还原的电流.进一步研究苯乙酮加氢还原的循环伏安特性表明,在本条件下,苯乙酮的还原是电化学反应完全不可逆的EC过程.
The electrodeposition of nickel onto graphite from acidic 85％ C_2H_5OH-15％ H_2O containing low concentration of Ni^(2+) for the electrocatalytic hydrogenation of acetophenone is investigated. It is shown that active Ni formed in situ on graphite cathode from a catholyte containing Ni^(2+), is possible to catalyze the convertion of acetophenone to a mixture of the corresponding alcohol and hydrocarbon. The presence of Ni^(2+) in the medium can maintain the activity of the surface by continuous deposition of fresh nickel.
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
1991年第1期51-54,共4页
Journal of Beijing Normal University(Natural Science)
关键词
有机物
电催化
加氢还原
活性镍
in situ electrocatalysis, hydrogenation of acetophenone
activenickel
cyclic voltametry
hydrogen evolution
