Microstructure and Electrochemical Properties of Electrodeposited Amorphous/Nanocrystalline Ni-Mo Alloy Electrode

Abstract

Abstract:

In order to make full use of the chemical activity of amorphous phase and nanocrystalline high surface area, the deposited Ni81.32Mo18.68 and Ni76.84Mo23.16 were obtained in alkaline solution. The X-ray diffraction described that the deposites were composed with amorphous structure and nanocrystalline phase. And the mass fraction of amorphous is about 37.66% and 73.24% separately. When the deposites are electrolyzed in 33℃, 7mol/L NaOH electrolytic solution, the amorphous/nanocrystal Ni-Mo alloy has low hydrogen evolution potential than nanocrystalline Ni alloy. The hydrogen evolution property of the deposites is increasing in corresponding with molybdenum content increase. And the electrolysis experiments show that the deposited active component is related with the amorphous content, the Ni76.84Mo23.16 alloy with more amorphous phase content has a lower hydrogen evolution potential, a higher exchange current density, and a better electrolytic stability.

Key words: amorphous/nanocrystalline, Ni-Mo-alloy, microstructure, electrochemical property

摘要：

为了充分利用非晶态合金的化学活性和纳米晶较高的比表面积，在碱性溶液中制得Ni81.32Mo18.68和Ni76.84Mo23.16两种合金镀层，X射线衍射表明，两种镀层均由非晶+纳米晶混合相组成，其非晶态含量（质量分数）分别为37.66%和73.24%。在33℃、7mol/L的NaOH溶液中的电化学性能实验表明，两种合金镀层具有比纳米晶Ni镀层低的析氢过电位。沉积镀层合金随着Mo含量的提高，镀层的析氢性能也相应提高。电解实验表明这两种合金的活性成分与非晶态含量有关，非晶态含量较多的Ni76.84Mo23.16合金的析氢过电位相对较低，交换电流密度高，且电解稳定性相对较好。

关键词:

非晶/纳米晶, 镍钼合金, 微结构, 电化学性能

CLC Number:

TQ153.2

LI Ning-1, GAO Cheng-Hui-2.

Microstructure and Electrochemical Properties of Electrodeposited Amorphous/Nanocrystalline Ni-Mo Alloy Electrode

[J]. China Mechanical Engineering, 2011, 22(17): 2117-2121.

李凝1, 高诚辉2.

电沉积非晶/纳米晶Ni-Mo合金电极结构及其电化学性能

[J]. 中国机械工程, 2011, 22(17): 2117-2121.

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