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fengheng金虫 (正式写手)
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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
AnnF
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fengheng: 金币+20, ★★★很有帮助, 谢谢！辛苦了！ 2012-05-24 08:37:44
fengheng: 金币+60 2012-05-26 19:25:54
fengheng: 金币+20, ★★★很有帮助, 谢谢！辛苦了！ 2012-05-24 08:37:44
fengheng: 金币+60 2012-05-26 19:25:54
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Mo6 Ni2 Cr3 + +, and, Gd3 + +, and Ti3 + etc don't happen metal ions electricity deposited. Fe3 + + +, and Mo6 Fe3 + + +, Fe2 + + Cu2 Cu2 + and Fe3 + + Zn2 + 30% KOH in total solution that can be deposited, Fe3 + + Ni2 + and Cu2 + + Cr3 + can't altogether deposition, total deposition Cr3 + Ni2 + or does not affect the activity of the cathode formation of hydrogen. Mo6 containing Fe3 + + in 30% of the solution to the electrolysis of water in KOH the minimum harmful concentration of 37.5 mg/L. Ni in contain Fe3 + + + Cu2 solution of the 200 mA/cm2 current density cathode polarization 30 min, in cathodic current density of 200 mA/cm2 of the formation of hydrogen in 20 ℃ over potential is about 550 mV, 85 ℃ is about 450 mV; Ni in Fe2 + + + containing Cu2 solution zhongheng current cathodic polarization of the formation of hydrogen after a potential in 20 ℃ about 540 mV, 85 ℃ is about 440 mV; Ni in contain Fe3 + + Mo6 + solution zhongheng current cathodic polarization of the formation of hydrogen after a potential in 20 ℃ about 450 mV, 85 ℃ is about 380 mV; Ni in contain Fe3 + + Zn2 + solution zhongheng current cathodic polarization of the formation of hydrogen after a potential in 20 ℃ about 420 mV. Ni in contain Fe3 + + Ni2 + solution and contain Fe3 Cr3 + + + solution zhongheng current cathodic polarization of the formation of hydrogen after a potential and Ni in contain Fe3 + solution zhongheng current cathodic polarization of after almost equally, 85 ℃ is about 450 mV; Ni in Cr3 + + + containing Cu2 solution zhongheng current cathodic polarization of the formation of hydrogen after a potential and Ni in contain Cu2 + solution zhongheng current cathodic polarization of the same after, 85 ℃ is about 500 mV, namely Ni2 Cr3 + + and did not change Ni cathode the formation of hydrogen over potential, Ni2 Cr3 + + and to have no effect on the formation of hydrogen Ni activity. In 85 ℃, Ni in sedimentary these impurity ions of the formation of hydrogen after a potential than Ni-Mo, Ni-Fe-Zn formation of hydrogen as active cathodes 180 mV increased about 300 mV. Therefore, 30% KOH in solution of metal ions in the surface of the Ni sedimentary will reduce the electrolysis of water of the cathode formation of hydrogen electrolysis of water activity and the current efficiency, increase power consumption. The metal impurity ions on about the formation of hydrogen electrolysis of water activity of the cathode influence, the influence of the total deposits are not reported. |
3楼2012-05-24 07:50:48
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