As mentioned in Section 3.1, variation in mode of electrodeposition likely led to changes in crystal facet distribution on SS/Sn0.8Pd0.2 electrodes, which might affect the nitrate reduction reaction. Koper et al. reported that nitrate reduction was a structure sensitive reaction[44]. They demonstrated that nitrate reduction was highly sensitive to the width of the Pt(100) terrace and N2 formation was preferably occurred at the Pt(100) facet. As a result, N2 formation ability decreased significantly when the (100) facets were perturbed by the (111) facets [44]. Kita et al. [45] and Feliu et al. [46] studied nitrate reduction over Pt single crystal electrode and reported that the reduction activity over Pt(100) was much greater than that on Pt(111) and Pt(110) facets [45,46]. Therefore, changes in crystal facet distribution induced by the mode of electrodeposition, are expected to influence nitrate reduction activity because of its structure sensitivity.