电沉积制备Ni-Mo-RE(Eu、Tb、Gd)/Cu及高效析氢性能

Electrodeposition of Ni-Mo-RE(Eu, Tb, Gd)/Cu and its highly efficient electrocatalytic hydrogen evolutionand activity

摘要:

开发低成本、高效且稳定的的非贵金属析氢材料,对工业化制氢有着重要意义。利用简便的电沉积方法在铜片(Cu)上原位构筑球形Ni-Mo-RE(Eu、Tb、Gd)稀土复合电催化剂,该催化剂在碱性条件下表现出高效的析氢(HER)活性。采取SEM、EDS、XPS、TEM等表征手段,表明沉积电压和稀土种类影响材料形貌,Eu的添加使材料形成尺寸均匀的球形颗粒和大量孔洞结构,大大增加活性位点提升催化效率。且电化学测试结果表明,Ni-Mo-Eu具有最大的电催化活性面积为1475,且材料在HER过电位(η10)仅有45mV且电荷转移电阻(Rct)最小为0.2497Ω.cm-2表现出高效的析氢活性。此外,经过1000次循环伏安和100h持续电解后,表现出良好的稳定性和耐久性。这些优异的电催化析氢性能表明,该材料在实际工业制氢中极具发展潜力。

Abstract:

Developing low-cost, efficient, and stable non-precious metal hydrogen evolution materials is of great significance for industrial hydrogen production. The spherical Ni-Mo-RE(Eu, Tb, Gd) rare earth composite electrocatalyst was constructed on copper sheet (Cu) by a simple electrodeposition method. The catalyst showed high hydrogen evolution (HER) activity under alkaline conditions. SEM, EDS, XPS, TEM and other characterization methods showed that the deposition voltage and rare earth species affected the morphology of the materials. The addition of Eu made the materials form spherical particles with uniform size and a large number of pores, which greatly increased the active sites and improved the catalytic efficiency. The electrochemical test results show that Ni-Mo-Eu has a maximum electrocatalytic active area of 1475, and exhibits high hydrogen evolution activity at HER overpotential (η10) of only 45mV and charge transfer resistance (Rct) of 0.2497Ω.cmIn addition, after 1000 cycles of voltammetry and 100h continuous electrolysis, the electrode showed good stability and durability. These excellent electrocatalytic hydrogen evolution properties indicate that the material has great development potential in practical industrial hydrogen production.