In this work, the effect of the crystallographic orientation of gold on the interfacial processes of six non-halide-based ionic liquids (ILs) and two iodide-based ILs was systematically investigated by linear sweep voltammetry (LSV), cyclic voltammetry (CV), and double potential step chronocoulometry (DPSCC). The cation and anion of the IL affected both the width of the electrical double layer (EDL) region (E_dl) and the electrochemical potential window (E_pw) of the ILs. The shape of the CV profile in the EDL region was unique for each Au(hkl)|IL interface. The reductive desorption and re-adsorption of iodine adatoms on gold in 1-alkyl-3-methylimidazolium iodide ([C_nmim][I], n = 4 or 6) were also surface-sensitive. The reduction peak current density was proportional to the scan rate, suggesting that the reaction involves adsorbed iodine. The amount of iodine adatoms desorbed during the initial cathodic scan was identical to the monolayer coverage of iodine on gold single crystal electrodes. The peak potential for reductive desorption was estimated to follow the ensuing order from negative to positive: [C₆mim][I] < [C₄mim][I] and Au(100) < Au(111) < Au(110). Following reductive desorption of iodine, the cations were partly attached to the gold surface. The adsorption strength of [C_nmim]⁺ followed an identical order: Au(100) < Au(111) < Au(110).

在这项工作中，通过线性扫描伏安法 (LSV)、循环伏安法 (CV) 系统地研究了金的晶体取向对六种非卤化物基离子液体 (ILs) 和两种碘化物基 ILs 界面过程的影响和双电位阶梯计时库仑法 (DPSCC)。IL 的阳离子和阴离子影响双电层 (EDL) 区域的宽度 ( E _dl ) 和IL的电化学电位窗口 ( E _pw )。EDL 区域的 CV 曲线形状对于每个 Au( hkl )|IL 界面都是唯一的。碘吸附原子在 1-烷基-3-甲基咪唑鎓碘化物 ([C _n mim][I], n= 4 或 6) 也是表面敏感的。还原峰电流密度与扫描速率成正比，表明反应涉及吸附的碘。在初始阴极扫描期间解吸的碘吸附原子的量与金单晶电极上碘的单层覆盖率相同。估计还原解吸的峰值电位遵循随后从负到正的顺序：[C ₆ mim][I] < [C ₄ mim][I] 和 Au(100) < Au(111) < Au(110) . 碘还原解吸后，阳离子部分附着在金表面。[C _n mim] ⁺的吸附强度遵循相同的顺序：Au(100) < Au(111) < Au(110)。