The effects of halide ions (F⁻, Cl⁻, Br⁻, or I⁻) on nanoporous Zn-based electrocatalysts were assessed. All catalysts in the presence of halides exhibited high electrocatalytic performances of CO₂ reduction reaction (CO₂RR) and efficient suppression of hydrogen evolution reaction (HER) with a maximum Faradaic efficiency of up to 97%. The increasing adsorption strength from F⁻ to I⁻ is proposed to form more porous structures and higher oxidized Zn species, thus facilitating the protonation of CO₂ and stabilizing the adsorbed intermediates induced by charge donation from the adsorbed halides on Zn surface to CO₂, enhance CO₂RR and simultaneously suppress HER.

卤离子（F效果^- ，氯^- ，溴^-或I ^- ）上Zn基纳米多孔电催化剂进行了评估。在卤化物存在下，所有催化剂均表现出高的CO ₂还原反应（CO ₂ RR）电催化性能和有效的制氢反应（HER）抑制作用，最大法拉第效率高达97％。选自F增加吸附强度^-到I ^- ，提出了以形成多个多孔结构和较高的氧化锌物种，从而有利于CO的质子化₂通过稳定从锌表面吸附的卤化物向CO ₂的电荷捐赠而诱导的吸附中间体，提高了CO ₂ RR并同时抑制了HER。