Data underlying the publication: Concentration-dependent effects of nickel doping on activated carbon biocathodes

Investigation of the combination of a metal electrocatalyst (nickel nanostructures on activated carbon) with a bio-electrocatalyst (mixed anaerobic microbial consortium) for CO2 electroreduction. Biological and abiotic electrochemical experiments, in duplicate, with 3 types of electrodes: without nickel catalyst, with low nickel loading (0.01% wt.), and with high nickel loading (5% wt.). Data includes current density and charge during chronoamperometry experiments, concentration of liquid and gas compounds, optical density, NH4⁺ nutrient concentration, pH of catholyte, electron recovery calculations, dissolved metal concentration (measured with ICP), and microbial community composition from planktonic samples (characterized with NGS).

本研究针对金属电催化剂（活性炭负载镍纳米结构）与生物电催化剂（混合厌氧微生物群落）组合用于二氧化碳电还原的应用开展系统探究。实验设置三类电极：无镍催化剂电极、低镍负载量电极（镍负载量0.01%重量百分比）、高镍负载量电极（镍负载量5%重量百分比），并开展两组平行重复的生物与非生物电化学实验。数据集涵盖计时电流法实验中的电流密度与电荷数据、气态及液态化合物浓度、光密度、铵根离子（NH₄⁺）营养盐浓度、阴极电解液pH值、电子回收率计算结果、溶解态金属浓度（通过电感耦合等离子体（ICP）测定），以及浮游微生物样本的群落组成（通过下一代测序（NGS）表征）。