在大量文献的基础上 ,采用正交试验优化电沉积Ni Mo P合金工艺。经过测试证明 :Ni Mo P合金镀层致密 ,结合力强 ,具有较高的硬度和耐高温腐蚀的性能。通过极化曲线的测定 ,钛基Ni Mo P合金具有比钛电极和铁电极更低的析氢过电势 ,Ni Mo ...在大量文献的基础上 ,采用正交试验优化电沉积Ni Mo P合金工艺。经过测试证明 :Ni Mo P合金镀层致密 ,结合力强 ,具有较高的硬度和耐高温腐蚀的性能。通过极化曲线的测定 ,钛基Ni Mo P合金具有比钛电极和铁电极更低的析氢过电势 ,Ni Mo P合金具有较高的电催化性能 ,可望成为新一代氯碱工业用高活性阴极。展开更多
The induced codeposition mechanism of Mo, P and Ni from the solution of ammoniac citrate was studied by means of steady-state polarization, AC impedance and X-ray Photoelectron Spectroscopy (XPS). The result of electr...The induced codeposition mechanism of Mo, P and Ni from the solution of ammoniac citrate was studied by means of steady-state polarization, AC impedance and X-ray Photoelectron Spectroscopy (XPS). The result of electrochemical measurements proved that [NiCit(NH3)(2)](-) is the electro-active species of nickel, though nickel ions exist mainly as [NiCit(NH3)(3)](-) in ammoniac citrate. XPS experiments proved the existence of tetravalent molybdenum corresponding to MoO2 on the surface of some deposits. The intermediate product, MoO2, was probably reduced to Mo in the alloy deposit by atomic hydrogen adsorbed on the induced metal nickel. The reduction of H2PO2- occurs through two distinctive steps with PH3 as an, intermediate, which subsequently reacts with atomic hydrogen to form P in the alloy deposit. The electrodeposition mechanism was proposed in this paper.展开更多
文摘在大量文献的基础上 ,采用正交试验优化电沉积Ni Mo P合金工艺。经过测试证明 :Ni Mo P合金镀层致密 ,结合力强 ,具有较高的硬度和耐高温腐蚀的性能。通过极化曲线的测定 ,钛基Ni Mo P合金具有比钛电极和铁电极更低的析氢过电势 ,Ni Mo P合金具有较高的电催化性能 ,可望成为新一代氯碱工业用高活性阴极。
文摘The induced codeposition mechanism of Mo, P and Ni from the solution of ammoniac citrate was studied by means of steady-state polarization, AC impedance and X-ray Photoelectron Spectroscopy (XPS). The result of electrochemical measurements proved that [NiCit(NH3)(2)](-) is the electro-active species of nickel, though nickel ions exist mainly as [NiCit(NH3)(3)](-) in ammoniac citrate. XPS experiments proved the existence of tetravalent molybdenum corresponding to MoO2 on the surface of some deposits. The intermediate product, MoO2, was probably reduced to Mo in the alloy deposit by atomic hydrogen adsorbed on the induced metal nickel. The reduction of H2PO2- occurs through two distinctive steps with PH3 as an, intermediate, which subsequently reacts with atomic hydrogen to form P in the alloy deposit. The electrodeposition mechanism was proposed in this paper.
