| 介孔碳化钨纳米片团簇的制备及其电催化析氢性能 | |
| Mesoporous Tungsten Carbide Nanoflakes Globular Clusters: Preparation and Electrocatalytic Properties for Hydrogen Evolution | |
| 摘要: 采用阳极氧化法与原位还原碳化法相结合，在电击穿条件下可控制备了具有介孔结构的碳化钨纳米片团簇(WC NFs)。通过 X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、N2吸附-脱附测试表征其物相、微观结构和孔径分布。在1 mol·L-1 H2SO4溶液中采用线性扫描伏安法、循环伏安法、计时电流法以及交流阻抗谱测试催化剂的电化学性能。结果表明，在 650 ℃下还原碳化所制备的 WC NFs具有最佳的电催化析氢性能，在电流密度为 10 mA·cm-2时过电位η10仅为 150 mV，Tafel斜率为56 mV·dec-1，并具有良好的循环稳定性。 | |
| 关键词: 介孔纳米花 阳极氧化 电催化 析氢反应 | |
| 基金项目: 国家自然科学基金(No.21173193，21301154)和浙江省自然科学基金(No.LQ19B010002)资助 | |
| Abstract: Tungsten carbide nanoflakes globular clusters (WC NFs) with the typical mesoporous structure were prepared by controlled breakdown anodization by a gas-solid carburization process. The crystal phase, microstructure, and pore size distribution of the nanoflowers were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and N2 adsorption-desorption test. The electrochemical properties were evaluated using linear sweep voltammetry, cyclic voltammetry, chronoamperometry, and electro-chemical impedance spectroscopy in 1 mol·L-1 H2SO4 solution. The results showed that as-prepared WC NFs exhibited enhanced superior hydrogen evolution performance in terms of a small η10 (overpotential to obtain a current density of 10 mA·cm-2) of 150 mV, a Tafel slope of 56 mV·dec-1, and outstanding long-term cycling stability. | |
| Keywords: mesoporous nanoflower anodization electrocatalysis hydrogen evolution reaction | |
| 投稿时间：2021-09-23 修订日期：2022-01-07 | |
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| 吴世照,高寒璐,陆啸丰,郑士涛,高静,李国华.介孔碳化钨纳米片团簇的制备及其电催化析氢性能[J].无机化学学报,2022,38(3):459-468. | |
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