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新型NiCo_2O_4电极析氧反应机理 被引量:2

Research of oxygen evolution mechanism of a new type of NiCo_2O_4 electrode
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摘要 在贱金属铁基上表面化学镀Ni Co P ,然后通过化学复合镀制得Ni Co P Al2 O3中间层 ,复合镀层用 5mol·L- 1NaOH溶液浸出 ,可制得新型Ni Co P微孔活性中间层 ,在中间层上再涂覆匹配性较好的NiCo2 O4表面活性层 ,该活性层是由一定Ni(NO3) 2 和Co(NO3) 2 的量配比通过高温热解而成 .为考察该电极在碱性溶液的析氧反应机理 ,通过恒电位阶跃实验I~t曲线求出了不同时间下的电量Q ,由Q对t1 / 2 作图得Q t1 / 2 曲线 .结果证明 ,Q t1 / 2 曲线为不通过坐标原点的直线 ,说明该析氧电极反应为典型的不可逆反应 .通过对析氧电极反应假想模型进行动力学推算及实验 ,初步确定了电极反应的速度控制步骤 . A Ni Co P Al 2O 3 composite coating was electrolessly plated after Ni Co P coating on Fe matrix. Then composite coating was immersed in 5 mol/L NaOH solution to obtain an active Ni Co P coating (middle coating) with microholes,on which an active surface coating of NiCo 2O 4 was pyrolysisly formed by dipping in 2.0 mol/L Ni(NO 3) 2, Co(NO 3) 2 several times. The electric charge( Q ) was measured by I t curves obtained through potentiostatic step at different time, Q t 1/2 curve was a straight line not through the origin dot, demonstrating oxygen evolution reaction was typically irreversible. The step of rate controlling of the electrode reaction in different current density was determined according to the electrode reaction dynamics and experiment results. [
出处 《中南工业大学学报》 CSCD 北大核心 2000年第4期303-306,共4页 Journal of Central South University of Technology(Natural Science)
基金 国家教育部优秀年轻教师基金资助项目! ( 1 998 1 2 )
关键词 电解 阳极 析氧反应 电极 活性层 化学镀 钴酸镍 alkaline water electrolysis anode oxygen evolution reaction
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参考文献2

  • 1田昭武著..电化学研究方法[M].北京:科学出版社,1984:405.
  • 2田昭武,电化学研究方法,1984年 被引量:1

同被引文献16

  • 1Singh R.-N. etc. The films of Co304 andaNiCo2O4 obtained by the method of chemical spray pyrolysis for electrocatalysis m. The electroeatalysis of oxygen evolution [ J ]. Journal of Applied Electro- chemistry, 1990,20:442-446. 被引量:1
  • 2Bo Chi etc. Effect of temperature on the preparation and electrocatalytic properties of a spinel NiCo2O4/Ni electrode[J]. International Journal of Hydrogen Energy,2004,29:605-610. 被引量:1
  • 3池波.钴尖晶石水解用复合阳极的制备及性能研究.清华大学学报,2006,(1). 被引量:1
  • 4Margolis N, Eisenhauer J. Inert anode road map, a framework for technology development[R]. The Aluminum Association and The US Department of Energy, Energetics Inc, Columbia, Maryland, Feb. 1998,30. 被引量:1
  • 5Anonymous. News and Update[J]. JOM, 2000, 52(9): 4-6. 被引量:1
  • 6Grjotheim K. Aluminium Electrolysis[M]. Dusseldof:Aluminium-Verlag, 1982. 365. 被引量:3
  • 7Ray S P. Inert Electrode Compositions[P]. US Patent 4374050, 1983. 被引量:1
  • 8Olsen E, Thonstad J. Nickel ferrite as inert anodes in aluminum electrolysis(Part Ⅰ) : Materials fabrication and preliminary testing [ J]. J Appl Electrochem,1999, 29(3): 293-299. 被引量:1
  • 9Lorentsen O A, Thonstad J. Electrolysis and post-testing of inert cermet anodes[A]. Sclmeider W. Light Metals[C]. Warrendale: TMS, 2002, 457-462. 被引量:1
  • 10Kvande H. Inert electrodes in aluminium electrolysis cells[A]. Eckert C E. Light Metals[C]. Warrendale:TMS, 1999. 369 - 376. 被引量:1

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