| NiFe-植酸复合物的室温制备及其全解水电催化性能 |
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| 引用本文： | 陈莹玉,刘怡君,陈晨欣,汪庆祥,高凤,孙伟. NiFe-植酸复合物的室温制备及其全解水电催化性能[J]. 复合材料学报, 2023, 40(2): 893-903. DOI: 10.13801/j.cnki.fhclxb.20220314.002 |
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| 作者姓名： | 陈莹玉 刘怡君 陈晨欣 汪庆祥 高凤 孙伟 |
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| 作者单位： | 闽南师范大学 化学化工与环境学院,漳州 363000;海南师范大学 海口市功能材料与光电化学重点实验室,海口 571158 |
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| 基金项目： | 国家自然科学基金(20805041);福建省自然科学基金(2019J05108) |
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| 摘 要： | 制备高稳定性、高活性双功能催化剂用于全解水制氢是氢能源大规模商业化应用的重要环节之一。本文以植酸(PA)、六水合氯化铁(FeCl3·6H2O)和六水合氯化镍(NiCl2·6H2O)为原料,采用两步室温浸渍法在泡沫镍(NF)上制备了片状无定形植酸-镍铁双金属复合材料(NiFe-PA)。采用线性扫描伏安法(LSV)考察了NiFe-PA修饰NF电极(NiFe-PA/NF)在碱性条件(1.0 mol/L KOH)的电解水催化性能。实验结果表明：由于NiFe双金属之间的协同效应,NiFe-PA/NF作为双功能催化剂显示出优越的析氧和析氢性能。NiFe-PA/NF电极在50 mA·cm-2电流密度下析氧反应的过电位仅需220 mV;在10 mA·cm-2电流密度下的析氢反应的过电位为135 mV。将NiFe-PA/NF组装成双电极系统用于全解水,达到10 mA·cm-2电流密度的电池电压仅需1.61 V,低于贵金属催化剂体系RuO2
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| 关 键 词： | NiFe双金属 植酸 全解水 高稳定性 太阳能驱动 |
| 收稿时间： | 2022-01-06 |
Room temperature preparation of NiFe-phytic acid composite and its electrocatalytic performance for overall water splitting |
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| Affiliation: | 1.College of Chemistry and Environment, Minnan Normal University, Zhangzhou 363000, China2.College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China |
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| Abstract: | The preparation of bifunctional catalysts with high stability and high activity for hydrogen production from water is one of the important step in the large-scale commercial application of hydrogen energy. Herein, the flake amorphous phytic acid-nickel iron bimetallic composite (NiFe-PA) has been prepared on foamed nickel (NF) by two-step room temperature impregnation using phytic acid (PA), ferric chloride hexahydrate (FeCl3·6H2O) and nickel chloride hexahydrate (NiCl2·6H2O) as the starting materials. The electrocatalytic performance of NiFe-PA modified NF electrode (NiFe-PA/NF) for water electrolysis in alkaline condition (1.0 mol/L KOH) was investigated by linear sweep voltammetry (LSV). The results show that NiFe-PA/NF, as a bifunctional catalyst, has excellent oxygen and hydrogen evolution properties due to the synergistic effect between Ni and Fe. The overpotentials are only 220 mV at 50 mA·cm?2 for oxygen evolution reaction (OER) and 135 mV at 10 mA·cm?2 hydrogen evolution reaction (HER). The NiFe-PA/NFs were then assembled into a two-electrode system for overall water splitting, and the cell voltage required to reach the current density of 10 mA·cm?2 was only 1.61 V, which is lower than the precious metal catalyst system of RuO2/NF||Pt-C/NF (1.64 V). It can also satisfy the hydrogen production driven by solar panels (2 V) under solar illumination conditions. Furthermore, owing to the high stability and corrosion resistance of the PA-metal complex, the catalytic stability of NiFe-PA/NF can be maintained at least for 175 h and 75 h, respectively, for the OER and HER at 100 mA·cm?2, indicating the high catalytic stability of NiFe-PA/NF at high current densities. |
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