The nickel hexacyanoferrate (NiHCF) nanoparticles film coated electrode was firstly used to recover low concentrated Pt(II) (∼ppm) from the dilute solution electrochemically. The film showed compact nanoparticles structure, high redox-active sites (4.6 mmol/g), characterised by Cyclic Voltammetry (CV), Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD) and Field Emission Scanning Electron Microscopy (FE-SEM). There was a prominent recovery effect of Pt(II) on NiHCF film in a well-stirred solution. The recovery of Pt(II) was improved with the potential decreasing but decreased with the background electrolyte concentration rising. And its recovery capacity was up to 498.62 mg/g at -0.6 V (vs. SCE), about occupying 56% of redox-active sites, which was significantly higher than the conventional adsorption process. The presence of Co²⁺ greatly enhanced the Pt(II) recovery from the dilute solution, since Co²⁺ inserted into availble Ni-NC-Fe-CN- sites, resulting in a drecrese of static electrostatic field and an increase of boundary laryer effect. Conversely, Ni²⁺ had an insignificant effect on Pt(II) recovery in agreement with the results of energy dispersive X-ray (EDX). The kinetic considerations indicated that the adsorption process was controlled by a multistep mechanism, and the whole process possibly involved the chemisorption of Pt(II) on NiHCF film firstly and then Pt(II) was reduced into Pt(0).

六氰合铁酸镍（NiHCF）纳米颗粒薄膜涂覆的电极首先用于从稀溶液中电化学回收低浓度的Pt（II）（〜ppm）。该膜显示紧凑的纳米颗粒结构，高氧化还原活性位点（4.6 mmol / g），其特征在于循环伏安法（CV），傅立叶变换红外光谱（FTIR），X射线衍射（XRD）和场发射扫描电子显微镜（FE） -SEM）。在搅拌良好的溶液中，Pt（II）在NiHCF膜上具有显着的恢复效果。Pt（II）的回收率随电势的降低而提高，但随着背景电解质浓度的升高而降低。在-0.6 V（vs. SCE）下，其回收容量高达498.62 mg / g，约占氧化还原活性位点的56％，明显高于常规吸附工艺。²⁺大大提高了从稀溶液中回收Pt（II）的能力，因为Co ²⁺插入了可用的Ni-NC-Fe-CN-位点，从而导致静电场的减少和边界层效应的增加。相反，与能量色散X射线（EDX）的结果一致，Ni ²⁺对Pt（II）的回收率影响不大。动力学方面的考虑表明，吸附过程是由多步机制控制的，整个过程可能首先涉及到Pt（II）在NiHCF膜上的化学吸附，然后将Pt（II）还原为Pt（0）。