Preparation of Hierarchical Nanoporous Al-SiO2/Ni-Mo Composite Electrodes and Their Electrocatalytic Hydrogen Evolution
Preparation of Hierarchical Nanoporous Al-SiO2/Ni-Mo Composite Electrodes and Their Electrocatalytic Hydrogen Evolution
复制标题
多级纳米孔Al-SiO2/Ni-Mo复合电极的制备及其电催化析氢
DOI：
10.1166/jnn.2016.12991
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发表时间：
2016
影响因子：
--
通讯作者：
Xu Lijian
中科院分区：
文献类型：
--
作者：
Du Jingjing;Xie Shaowen;Li Na;Xu Jianxiong;Xu Lijian
本研究采用溶解模板法制备了多级孔Al-SiO2纳米颗粒。利用透射电子显微镜（TEM）、能谱仪（EDS）、扫描电子显微镜（SEM）、氮气吸附溶出曲线和Barrett-Joyner-Halenda（BJH）孔径分布曲线对具有中空结构的分级纳米孔Al-SiO2颗粒进行了分析。通过在 Ni-Mo 电镀液上复合沉积分级纳米孔 Al-SiO2 颗粒，制备了分级纳米孔 Al-SiO2/Ni-Mo 复合电极。结果表明，分级纳米孔Al-SiO2样品的比表面积为396 m2/g，孔体积为1.37 cm3/g，介孔孔径为3.3 nm。当电镀液中分级纳米孔Al-SiO2的浓度为2 g/L时，复合电极的析氢电催化活性达到最佳值，表明其“泡沫”结构不仅增大了电极表面积，而且有效提高了铝的电催化性能，表明分级纳米孔Al-SiO2/Ni-Mo复合电极的电催化析氢比单独的Ni-Mo电极更具优势。
Hierarchical nanoporous Al–SiO2 particles were prepared in this study by dissolving template method. The hierarchical nanoporous Al–SiO2 particles with hollow structure were analyzed by transmission electron microscope (TEM), energy dispersive spectrometer (EDS), scanning electron microscope (SEM), nitrogen adsorption stripping curves and Barrett-Joyner-Halenda (BJH) pore size distribution curves. Hierarchical nanoporous Al–SiO2/Ni–Mo composite electrodes were prepared by composite deposition of hierarchical nanoporous Al–SiO2 particles onto electroplating bath of Ni–Mo. Results showed that the specific surface area for the hierarchical nanoporous Al–SiO2 sample was 396 m2/g, with pore volume being 1.37 cm3/g and mesoporous pore size being 3.3 nm. The hydrogen evolution electrocatalytic activities for the composite electrodes reached the optimal value when the concentration of the hierarchical nanoporous Al–SiO2 in the electroplating bath was 2 g/L, indicating that their “foam” structure did not only enhance the electrode surface area but also effectively improved the electrocatalytic properties of aluminum and showed that the electrocatalytic hydrogen evolution by the hierarchical nanoporous Al–SiO2/Ni–Mo composite electrodes had more advantages than that of the Ni–Mo electrodes alone.