An iron cation double isolated strategy is applied to construct Fe, N‐containing porous biomass carbon oxygen reduction reaction (ORR) electrocatalysts. Two different activating agents, Zn(NO₃)₂ and ZnCl₂, are used respectively, using one‐pot co‐pyrolysis over the rangooncreeper fruit (RF) biomass template absorbed with the Fe‐PPy (Fe³⁺‐bonded by polypyrrole matrix) and Fe‐bipyridine (Fe³⁺‐bonded by 2,2‐bipyridine ligands). It is found that the resulting product Zn(NO₃)₂‐Fe/C/N@bio‐C provides bigger specific area and higher mesoporous volume ratio than those provided by ZnCl₂‐Fe/C/N@bio‐C. Zn(NO₃)₂‐Fe/C/N@bio‐C also exhibits better ORR property (E_1/2 = 0.95 V, E_onset = 0.86 V, and J_L = 6.21 mA cm⁻²) in an alkaline medium compared to those of ZnCl₂‐Fe/C/N@bio‐C (E_onset = 0.89 V, E_1/2 = 0.77 V, and J_L = 6.20 mA cm⁻²). This work provides useful guidance for designing and developing high‐performance non‐noble‐metal‐based bio‐carbon catalysts by a combination between regulating the distribution of the precursor of metal active sites and efficient Zn‐based activator.

中文翻译：

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出色的铁，氮共掺杂多孔生物质碳氧还原反应电催化剂：锌基活化剂对催化活性的影响

采用铁阳离子双重分离策略来构建含铁，氮的多孔生物质碳氧还原反应（ORR）电催化剂。分别使用一锅共热解吸附有Fe-PPy（由聚吡咯基质键合的Fe ³⁺）的仰光爬山虎（RF）生物量模板上的两种不同的活化剂Zn（NO ₃）₂和ZnCl ₂）和Fe-Bipyridine（Fe ^3+-由2,2-Bipyridine配体键合）。结果发现，与ZnCl ₂ -Fe / C / N @ bio-C相比，所得产物Zn（NO ₃）₂ -Fe / C / N @ bio-C具有更大的比表面积和更高的中孔体积比。锌（NO ₃）与ZnCl相比，₂ ‐Fe / C / N @ bio‐C在碱性介质中还表现出更好的ORR特性（E _1/2  = 0.95 V，E_起始 = 0.86 V和J _L  = 6.21 mA cm ^-2）₂ -Fe / C / N @ bio-C（E_起始 = 0.89 V，E _1/2  = 0.77 V，J _L  = 6.20 mA cm ^-2）这项工作通过调节金属活性部位前体的分布与高效的锌基活化剂之间的结合，为设计和开发高性能的非贵金属基生物碳催化剂提供了有用的指导。