| XPS STUDIES OF OXIDATION BEHAVIOR OF NICKEL AND THERMAL STABILITY OF SURFACE OXIDES |
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| 作者姓名： | ZHAO Liangzhong PAN Chenghuang Institute of Chemistry Academia Sinica Beijing China [Originally published in ACTA METALL SIN |
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| 作者单位： | ZHAO Liangzhong PAN Chenghuang Institute of Chemistry，Academia Sinica，Beijing，China [Originally published in ACTA METALL SIN (CHINESE EDN) 24 (5) 1988 pp B359—B363，received 18 February 1987;in revised form 15 January 1988] |
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| 摘 要： | Surface oxidation of polycrystalline nickel foil in air and pure water at different temperaturesand the thermal stability of the surface oxides have been investigated by means of XPS.In ad-dition to NiO,Ni_2O_3 is formed especially after long periods of air exposure.Nickel surfacesare much less reactive to pure water than to air.The thermal stability of the surface oxides isrelated to oxidative temperature.The surface species of oxides formed by air exposure attemperatures below 120℃ can be reduced into nickel metal after heating the sample in vacuumat 300℃ for only 10 minutes (in the case of room temperature) to 1 h (in the case of 120℃).This reduction is caused by reaction with surface carbon contaminants.However,the surfacespecies of nickel oxides formed by air exposure with heating at temperatures above 200℃ cannot be reduced into metal after heating the sample in vacuum at 300℃ for 1h.
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| 收稿时间： | 1989-08-11 |
| 修稿时间： | 1989-08-11 |
XPS STUDIES OF OXIDATION BEHAVIOR OF NICKEL AND THERMAL STABILITY OF SURFACE OXIDES |
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| ZHAO Liangzhong PAN Chenghuang Institute of Chemistry,Academia Sinica,Beijing,China Originally published in ACTA METALL SIN.XPS STUDIES OF OXIDATION BEHAVIOR OF NICKEL AND THERMAL STABILITY OF SURFACE OXIDES[J].Acta Metallurgica Sinica(English Letters),1989,2(8):133-137. |
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| Authors: | ZHAO Liangzhong PAN Chenghuang Institute of Chemistry Academia Sinica Beijing China [Originally published in ACTA METALL SIN |
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| Abstract: | Surface oxidation of polycrystalline nickel foil in air and pure water at different temperatures and the thermal stability of the surface oxides have been investigated by means of XPS.In ad- dition to NiO,Ni_2O_3 is formed especially after long periods of air exposure.Nickel surfaces are much less reactive to pure water than to air.The thermal stability of the surface oxides is related to oxidative temperature.The surface species of oxides formed by air exposure at temperatures below 120℃ can be reduced into nickel metal after heating the sample in vacuum at 300℃ for only 10 minutes (in the case of room temperature) to 1 h (in the case of 120℃). This reduction is caused by reaction with surface carbon contaminants.However,the surface species of nickel oxides formed by air exposure with heating at temperatures above 200℃ can not be reduced into metal after heating the sample in vacuum at 300℃ for 1h. |
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| Keywords: | XPS nickel surface oxide thermal stability |
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