材料科学
电极
电化学
复合数
制作
镍
雷尼镍业
氢
化学工程
蚀刻(微加工)
复合材料
纳米技术
冶金
化学
图层(电子)
有机化学
物理化学
替代医学
病理
工程类
医学
作者
Sergii A. Sergiienko,Daniela Lopes,G. Constantinescu,Marta C. Ferro,Nataliya D. Shchaerban,Obid Tursunov,Viacheslav I. Shkepu,Hanna Pazniak,N. Yu. Tabachkova,E. Rodrı́guez Castellón,J.R. Frade,Andrei V. Kovalevsky
标识
DOI:10.1016/j.ijhydene.2021.01.041
摘要
This work explores the possibilities for the processing of Ni- and Ti3C2Tx (T = OH, O) MXene-containing composite electrodes, by co-pressing and plastic deformation or by etching of the electrodes prepared directly by self-propagation high-temperature synthesis (SHS). Various material design approaches were also explored. In order to tune the Ti3C2 interlayer distance in Ti3C2Al MAX phase, an introduction of additional Al to form Ti3C2Alz materials with z > 1 was attempted. Self-propagation high-temperature synthesis of powder mixtures with extra Ni and Al content (e.g. Ni:Ti:Al:C = 1:2:3:1) resulted in SHS products containing Ti3C2Alz z > 1 material and Ni–Al alloys. Further etching of these products in 10M NaOH allowed the direct formation of electrodes with active surface containing Ti3C2Tx (T = OH, O) MXene- and Raney nickel-containing composites. The electrochemical studies were focused on hydrogen evolution and showed the potential for boosting the electrochemical reaction in Ni and MXene-containing composite electrodes, especially at high current densities. The guidelines for the processing of such electrodes under fluorine-free conditions are proposed and discussed.
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