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A nitrogen and sulfur co-doped iron-based electrocatalyst derived from iron and biomass ligand towards the oxygen reduction reaction in alkaline media
Dalton Transactions ( IF 3.5 ) Pub Date : 2021-08-31 , DOI: 10.1039/d1dt01873f Haiyan Zhao 1 , Li Chen 2 , Yinghao Xu 3 , He Wang 3 , Jia-Yi Li 1 , Yan Xie 4 , Li Wang 1
Dalton Transactions ( IF 3.5 ) Pub Date : 2021-08-31 , DOI: 10.1039/d1dt01873f Haiyan Zhao 1 , Li Chen 2 , Yinghao Xu 3 , He Wang 3 , Jia-Yi Li 1 , Yan Xie 4 , Li Wang 1
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Research on highly efficient nitrogen and sulfur co-doped carbon materials is crucial for the development of Fe-based non-noble metal electrocatalysts (NNMEs) as alternatives to platinum-group metal-based electrocatalysts for the oxygen reduction reaction (ORR) in fuel cells. In this work, complexes were derived from iron salt and biomass ligands, subsequently mixed with active carbon nanoparticles (NPs) and pyrolyzed at 800 °C to obtain the resulting electrocatalysts Fe/NSC (800) and Fe/NC (800). Through screening the synthetic parameters, it was found that the N and S co-decorated Fe-based electrocatalyst of Fe/NSC (800) displays better ORR performances in terms of the onset potential (Eonset) and the half-wave potential (E1/2) than those of the Fe-free electrocatalyst of NSC (800) and the N-doped electrocatalyst of Fe/NC (800). The improved ORR activity can be mainly ascribed to the FeN4 active sites, as well as the additional S-doping within the carbon matrixes. Additionally, Fe/NSC (800) displays good durability superior to that of 20 wt% Pt/C in 0.1 M KOH solution. This synthetic approach is beneficial for the synthesis of NNMEs with biomass ligands for boosting the ORR performances in an alkaline solution.
中文翻译：
一种源自铁和生物质配体的氮硫共掺杂铁基电催化剂在碱性介质中的氧还原反应
研究高效的氮和硫共掺杂碳材料对于开发铁基非贵金属电催化剂（NNME）作为燃料电池氧还原反应（ORR）中铂族金属基电催化剂的替代品至关重要. 在这项工作中，配合物源自铁盐和生物质配体，随后与活性炭纳米粒子 (NPs) 混合并在 800 °C 下热解，以获得所得的电催化剂 Fe/NSC (800) 和 Fe/NC (800)。通过对合成参数的筛选，发现N和S共修饰的Fe基Fe基电催化剂Fe/NSC(800)在起始电位( E onset )和半波电位( E 1/2) 比 NSC (800) 的无 Fe 电催化剂和 Fe/NC (800) 的 N 掺杂电催化剂的那些。改进的 ORR 活性主要归因于 FeN 4活性位点，以及碳基质中的额外 S 掺杂。此外，Fe/NSC (800) 在 0.1 M KOH 溶液中表现出优于 20 wt% Pt/C 的良好耐久性。这种合成方法有利于合成具有生物质配体的 NNME，以提高碱性溶液中的 ORR 性能。
更新日期：2021-09-16
中文翻译：
一种源自铁和生物质配体的氮硫共掺杂铁基电催化剂在碱性介质中的氧还原反应
研究高效的氮和硫共掺杂碳材料对于开发铁基非贵金属电催化剂（NNME）作为燃料电池氧还原反应（ORR）中铂族金属基电催化剂的替代品至关重要. 在这项工作中，配合物源自铁盐和生物质配体，随后与活性炭纳米粒子 (NPs) 混合并在 800 °C 下热解，以获得所得的电催化剂 Fe/NSC (800) 和 Fe/NC (800)。通过对合成参数的筛选，发现N和S共修饰的Fe基Fe基电催化剂Fe/NSC(800)在起始电位( E onset )和半波电位( E 1/2) 比 NSC (800) 的无 Fe 电催化剂和 Fe/NC (800) 的 N 掺杂电催化剂的那些。改进的 ORR 活性主要归因于 FeN 4活性位点，以及碳基质中的额外 S 掺杂。此外，Fe/NSC (800) 在 0.1 M KOH 溶液中表现出优于 20 wt% Pt/C 的良好耐久性。这种合成方法有利于合成具有生物质配体的 NNME，以提高碱性溶液中的 ORR 性能。
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