深共融溶剂中电沉积Ni-Mo合金及其催化析氢性能

摘要

Ni-Mo alloys were electrodeposited in the deep eutectic solvent system. To obtain the information on deposit’s morphology, structure and hydrogen evolution activity, scanning electron microscopy (SEM),X-ray diffraction (XRD) and polarization curve test were used respectively. SEM images and XRD pattern showed that the prepared alloy had a nanocrystalline structure with average crystallites size of 2.2 nm. The deposit contained about 5% (mass) Mo and had a large roughness factor. Polarization curves indicated that hydrogen generation potential of Ni-Mo alloy deposited in ionic liquid had a positively shift of about 100 mV compared to Ni-Mo alloy deposited in aqueous solution and had a positive shift of about 250 mV compared to pure Ni electrode at current density of 0.1 A·cm2.%在深共融溶剂体系中电沉积制备了 Ni-Mo 合金。利用扫描电镜(SEM)、X 射线衍射仪(XRD)及电化学测试对Ni-Mo合金形貌、结构及性能进行了表征。SEM、XRD测试结果表明，Ni-Mo合金为纳米晶结构，平均晶粒尺寸约为2.2 nm；镀层表面微观粗糙度较大，Mo的质量分数约为5%。阴极极化曲线测试结果表明，当电流密度为0.1 A·cm-2时，深共融溶剂中制备的Ni-Mo合金电极析氢电位比水溶液中制备的Ni-Mo合金电极正移约100 mV，相比纯Ni电极正移近250 mV。