中文题名: | 硫化物复合体的合成及电催化分解水性能研究 |
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保密级别: | 公开 |
论文语种: | chi |
学科代码: | 070301 |
学科专业: | |
学生类型: | 学士 |
学位: | 理学学士 |
学位年度: | 2024 |
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学院: | |
第一导师姓名: | |
第一导师单位: | |
提交日期: | 2024-05-28 |
答辩日期: | 2024-05-28 |
外文题名: | Synthesis of sulfide complexes and study of electrocatalytic water splitting properties |
中文关键词: | |
外文关键词: | Water electrolysis ; Hydrogen energy ; Nickel foam ; Metal sulfides ; Molybdate ; Hydrogen evolution catalysts |
中文摘要: |
化石燃料的不断消耗和环境污染问题加剧, 促使人们开发新能源。氢能具有高的能量密度,使用中可实现零排放,为绿色、高效的能源载体。水的电解可获得氢能,而该过程需添加催化剂以降低过电位。开发低成本、高效的非贵金属催化剂意义重大。本文以泡沫镍(NF)为基底并提供镍源,添加钼酸钠和硫代乙酰胺,通过一步水热法在NF原位生长复合体材料,经XRD、XPS、Raman表征推测其组成为NiMoO4/MoS2/Ni3S2/NF。通过调控硫源用量x(x为硫代乙酰胺的摩尔数),所得产物NiMoO4/MoS2/Ni3S2/NF-2在碱性和酸性电解质中均具有优良的析氢(HER)催化性能。碱性条件下,电流密度为10 mA cm-2时所需过电位低至48.8 mV,且稳定性超过164 h;酸性条件下,10 mA cm-2的过电位为72 mV,稳定性达38 h。本论文为开发性能优异的析氢催化剂提供重要参考。 |
外文摘要: |
The continuous consumption of fossil fuels and the intensification of environmental pollution have prompted people to develop new energy sources. Hydrogen energy has a high energy density and can achieve zero polluting emissions in use, making it a green and efficient energy carrier. Hydrogen can be obtained from the electrolysis of water, a process that requires the addition of a catalyst to reduce the overpotential. The development of low-cost, high-efficiency non-precious metal catalysts is of great significance. In this work, nickel foam (NF) was used as the substrate and provided a nickel source, sodium molybdate and thioacetamide were added to grow composite materials in situ on NF substrate by one-step hydrothermal method, and the composition was estimated to be NiMoO4/MoS2/Ni3S2/NF by XRD, XPS and Raman characterizations. By adjusting the amount of sulfur source x (x represents the moles of thioacetamide), the obtained product NiMoO4/MoS2/Ni3S2/NF-2 exhibits excellent hydrogen evolution (HER) catalytic performance in both alkaline and acidic electrolytes. Under alkaline conditions, the overpotential required is as low as 48.8 mV at a current density of 10 mA cm-2 and has a stability of more than 164 h, while under acidic conditions, the overpotential of 10 mA cm-2 is 72 mV and the stability is up to 38 h. This work provides an important guide for the development of hydrogen evolution catalysts with excellent performance. |
参考文献总数: | 55 |
馆藏号: | 本070301/24064 |
开放日期: | 2025-05-29 |