Preparation and electrochemical properties of the Pd-modified Cu electrode for nitrate reduction in water
Preparation and electrochemical properties of the Pd-modified Cu electrode for nitrate reduction in water
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发表时间：
2006
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通讯作者：
Y. Wang;J. Qu;Hj Liu
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作者：
Y. Wang;J. Qu;Hj Liu
采用电沉积法在不同电位下制备了Pd修饰的铜(Pd/Cu)硝酸盐还原电极。用循环伏安法对比研究的其他电极(铜、锡/铜和钯/钛电极)，发现钯/铜电极对硝酸盐还原具有最高的电催化能力。研究发现，在较负的电极电位下，铜表面形成的Pd颗粒越小。电极，有利于硝酸盐还原。随着Pd沉积量的增加，硝酸盐还原能力增强。然而，过高的Pd会对硝酸盐还原能力产生负面影响。在我们的研究中，当Pd的电沉积电位为-0.3V，沉积量为0.9C时，硝酸盐还原电流最大为2.07 mA/cm(2)。
The Pd-modified Cu (Pd/Cu) electrodes for nitrate reduction were prepared using electro-deposition method at different potentials. Compared with other different electrodes so far studied in our work (Cu, Sn/Cu and Pd/Ti electrode) using cyclic voltammetry method, Pd/Cu electrode showed the highest electrocatalytic capacity of nitrate reduction. It was found that at more negative electrode potential the smaller Pd particles formed on the Cu. electrode, which was beneficial to the nitrate reduction. With increasing deposition amount of Pd, the capacity of nitrate reduction increased. Too rich Pd, however, has a negative influence on the capacity of nitrate reduction. In our study, the maximum nitrate reduction current was 2.07 mA/cm(2), when electrodeposition potential of Pd was -0.3 V and deposition amount was 0.9 C.