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应用微电极恒电位阶跃法研究了在Ni(OH) 2 电极的阳极及阴极过程反应中 ,温度对球形Ni(OH) 2 的质子扩散系数和表观扩散活化能的影响 .研究表明 ,于Ni(OH) 2 中掺杂Co和Co +Zn后可降低其阳极和阴极过程的表观扩散活化能 ,增大质子扩散系数 ,掺Co的效果更加明显 ,而掺Zn则增大表观扩散活化能 ,降低了扩散系数 .这说明前者的掺入其作用是降低了质子扩散阻力使电极的反应活性增加、而后者的掺入则是增大了质子的扩散阻力而使电极反应活性降低 .
The effect of temperature on the proton diffusion coefficient and apparent diffusion activation energy of spherical Ni (OH) 2 was studied by the potentiostatic step method of Ni (OH) 2 electrode at the anode and cathode of Ni (OH) 2 electrode. The doping of Co and Co + Zn in Ni (OH) 2 can reduce the apparent diffusion activation energy of the anode and cathode, increase the proton diffusion coefficient, and the effect of Co-doping is more obvious, while the addition of Zn increases the apparent diffusion Activation energy, reducing the diffusion coefficient.This shows that the former incorporation of its role is to reduce the proton diffusion resistance of the electrode reactivity increased, while the latter is the incorporation of proton diffusion resistance increases the electrode reactivity decreased.