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fengheng金蟲(chóng) (正式寫(xiě)手)
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[求助]
化學(xué)論文摘要部分翻譯，急！
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Mo6+、Ni2+、Cr3+、Gd3+和Ti3+等金屬離子都不發(fā)生電沉積。Fe3++Mo6+、Fe3++Cu2+、Fe2++Cu2+和Fe3++Zn2+在30%KOH溶液中能共沉積，F(xiàn)e3++Ni2+和Cu2++Cr3+不能共沉積，共沉積的Ni2+或Cr3+不影響陰極的析氫活性。 Mo6+在含F(xiàn)e3+的30%KOH溶液中對(duì)電解水的最低有害濃度為37.5mg/L。 Ni在含F(xiàn)e3++Cu2+的溶液中采用200mA/cm2的電流密度陰極極化30min后，在陰極電流密度200mA/cm2的析氫過(guò)電位在20℃時(shí)約為550mV、85℃時(shí)約為450mV；Ni在含F(xiàn)e2++Cu2+溶液中恒電流陰極極化后的析氫過(guò)電位在20℃時(shí)約為540mV、85℃時(shí)約為440mV；Ni在含F(xiàn)e3++Mo6+溶液中恒電流陰極極化后的析氫過(guò)電位在20℃時(shí)約為450mV、85℃時(shí)約為380mV；Ni在含F(xiàn)e3++Zn2+溶液中恒電流陰極極化后的析氫過(guò)電位在20℃時(shí)約為420mV。Ni在含F(xiàn)e3++Ni2+溶液與含F(xiàn)e3++Cr3+溶液中恒電流陰極極化后的析氫過(guò)電位與Ni在含F(xiàn)e3+溶液中恒電流陰極極化后的幾乎相等，85℃時(shí)約為450mV；Ni在含Cu2++Cr3+溶液中恒電流陰極極化后的析氫過(guò)電位與Ni在含Cu2+溶液中恒電流陰極極化后的相同，85℃時(shí)約為500mV，即Ni2+和Cr3+并沒(méi)有改變Ni陰極析氫過(guò)電位，Ni2+和Cr3+對(duì)Ni析氫活性沒(méi)有影響。在85℃，Ni在沉積這些雜質(zhì)離子后的析氫過(guò)電位比Ni-Mo、Ni-Fe-Zn等高析氫活性陰極的180mV增大了約300mV。因此，30%KOH溶液中金屬離子在Ni表面的沉積將降低電解水陰極的析氫活性和電解水的電流效率，增加電能消耗。 關(guān)于上述金屬雜質(zhì)離子對(duì)電解水中陰極析氫活性的影響、共沉積的影響都沒(méi)有文獻(xiàn)報(bào)道。 |
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【答案】應(yīng)助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ...
fengheng: 金幣+20, ★★★很有幫助, 謝謝！辛苦了！ 2012-05-24 08:37:44
fengheng: 金幣+60 2012-05-26 19:25:54
fengheng: 金幣+20, ★★★很有幫助, 謝謝！辛苦了！ 2012-05-24 08:37:44
fengheng: 金幣+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樓2012-05-24 07:50:48
【答案】應(yīng)助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ...
fengheng: 金幣+20, 翻譯EPI+1, ★★★很有幫助, 謝謝！辛苦了！ 2012-05-24 08:37:29
fengheng: 金幣+80 2012-05-26 19:25:48
fengheng: 金幣+20, 翻譯EPI+1, ★★★很有幫助, 謝謝！辛苦了！ 2012-05-24 08:37:29
fengheng: 金幣+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樓2012-05-23 22:54:58
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