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fengheng金虫 (正式写手)
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[求助]
化学论文摘要部分翻译，急！
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Mo6+、Ni2+、Cr3+、Gd3+和Ti3+等金属离子都不发生电沉积。Fe3++Mo6+、Fe3++Cu2+、Fe2++Cu2+和Fe3++Zn2+在30%KOH溶液中能共沉积，Fe3++Ni2+和Cu2++Cr3+不能共沉积，共沉积的Ni2+或Cr3+不影响阴极的析氢活性。 Mo6+在含Fe3+的30%KOH溶液中对电解水的最低有害浓度为37.5mg/L。 Ni在含Fe3++Cu2+的溶液中采用200mA/cm2的电流密度阴极极化30min后，在阴极电流密度200mA/cm2的析氢过电位在20℃时约为550mV、85℃时约为450mV；Ni在含Fe2++Cu2+溶液中恒电流阴极极化后的析氢过电位在20℃时约为540mV、85℃时约为440mV；Ni在含Fe3++Mo6+溶液中恒电流阴极极化后的析氢过电位在20℃时约为450mV、85℃时约为380mV；Ni在含Fe3++Zn2+溶液中恒电流阴极极化后的析氢过电位在20℃时约为420mV。Ni在含Fe3++Ni2+溶液与含Fe3++Cr3+溶液中恒电流阴极极化后的析氢过电位与Ni在含Fe3+溶液中恒电流阴极极化后的几乎相等，85℃时约为450mV；Ni在含Cu2++Cr3+溶液中恒电流阴极极化后的析氢过电位与Ni在含Cu2+溶液中恒电流阴极极化后的相同，85℃时约为500mV，即Ni2+和Cr3+并没有改变Ni阴极析氢过电位，Ni2+和Cr3+对Ni析氢活性没有影响。在85℃，Ni在沉积这些杂质离子后的析氢过电位比Ni-Mo、Ni-Fe-Zn等高析氢活性阴极的180mV增大了约300mV。因此，30%KOH溶液中金属离子在Ni表面的沉积将降低电解水阴极的析氢活性和电解水的电流效率，增加电能消耗。 关于上述金属杂质离子对电解水中阴极析氢活性的影响、共沉积的影响都没有文献报道。 |
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fengheng: 金币+20, 翻译EPI+1, ★★★很有帮助, 谢谢！辛苦了！ 2012-05-24 08:37:29
fengheng: 金币+80 2012-05-26 19:25:48
fengheng: 金币+20, 翻译EPI+1, ★★★很有帮助, 谢谢！辛苦了！ 2012-05-24 08:37:29
fengheng: 金币+80 2012-05-26 19:25:48
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Mo6+, Ni2+, Cr3+, Gd3+ and Ti3+ and other metal ions electro-deposition does not take place. Fe3++Mo6+, Fe3++Cu2+, Fe2++Cu2+ and Fe3++Zn2+ in 30%KOH solutions Central can total deposition, Fe3++Ni2+ and Cu2++Cr3+ are not all sedimentary, Ni2+ or Cr3+ does not affect the total accumulation of cathodic hydrogen activity. Ni in Fe3++Cu2+ of 200mA/cm2 in aqueous solution of cathodic polarization current density 30min, cathode current density of hydrogen evolution overpotential 200mA/cm2 at 20 ° c is approximately about 450mV 550mV, 85 ° c;Hydrogen over Ni containing Fe2 + + Cu2 + solution in the constant current cathodic polarization potential of approximately 540mV at 20 ° C , 85 ° C is about 440mV ; Ni containing Fe3 + + Mo6 + solution in the constant current cathodic polarization of overpotential is about 450mV at 20 ° C , 85 ° C is about 380mV ; hydrogen over Ni containing Fe3 + + and Zn2 + solution in the constant current cathodic polarization potential of approximately 420mV at 20 ° C.Ni in the containing of Fe3 + after of Ni2 + solution and containing of Fe3 + of Cr3 + solution in the constant current cathodic polarization hydrogen evolution over potential with Ni containing Fe3 + solution in the constant current cathode polarization is almost equal , 85 ℃ is about 450mV ; Ni containing of Cu2 + + of Cr3 + solution in the constant current cathodic polarization hydrogen evolution over potential with Ni containing of Cu2 + solution in the constant current cathodic polarization , the same 85 ℃ is about 500mV , that is, of Ni2 + and of Cr3 + and did not change the Ni cathode overpotential of Ni2 + and Cr3 + Ni hydrogen evolution activity .At 85 ° C , Ni deposition of these impurity ions of hydrogen evolution overpotential of 180mV high hydrogen evolution activity than the Ni- Mo , Ni - Fe -Zn cathode increases of about 300mV . Therefore , 30% KOH solution , the deposition of metal ions in the Ni surface will reduce the activity of hydrogen evolution and the current efficiency of the electrolysis of water in the cathode of the electrolysis of water , increase power consumption . |
2楼2012-05-23 22:54:58