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Tri-(Fe/F/N)-doped porous carbons as electrocatalysts for the oxygen reduction reaction in both alkaline and acidic media.
Nanoscale ( IF 5.8 ) Pub Date : 2020-08-13 , DOI: 10.1039/d0nr04920d Yongxing Diao 1 , Hanmeng Liu , Zhixia Yao , Yaosheng Liu , Guangxing Hu , Qifang Zhang , Zhuang Li
Nanoscale ( IF 5.8 ) Pub Date : 2020-08-13 , DOI: 10.1039/d0nr04920d Yongxing Diao 1 , Hanmeng Liu , Zhixia Yao , Yaosheng Liu , Guangxing Hu , Qifang Zhang , Zhuang Li
Affiliation
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Developing a low cost, sustainable and high-performance precious-metal free catalyst to replace platinum (Pt)-based catalysts for the oxygen reduction reaction (ORR) in fuel cells has recently attracted significant attention. It is crucial to produce more abundant and more uniformly dispersed ORR active sites for improving the ORR performance of the catalyst. Herein, we synthesized tri-(Fe/F/N)-doped porous carbons as high-efficiency electrocatalysts for the ORR by using Fe-zeolitic imidazolate framework-8 (Fe-ZIF-8) and ammonium fluoride as precursors. The results indicate that the as-prepared FeFNC-5 catalysts exhibit superior ORR activity, methanol tolerance, and long-term stability compared to commercial 20 wt% Pt/C in both alkaline and acidic media because of the abundant and dispersed Fe–Nx and pyridinic-N active sites, high specific surface area, and hierarchical porous structure. This work provides a new method and insights into the synthesis of Fe, F, and N triple-doped porous carbons as high-efficiency ORR electrocatalysts.
中文翻译：
掺杂三（Fe / F / N）的多孔碳作为在碱性和酸性介质中进行氧还原反应的电催化剂。
开发低成本，可持续和高性能的不含贵金属的催化剂来代替铂基（Pt）催化剂用于燃料电池中的氧还原反应（ORR）已引起了广泛的关注。产生更丰富和更均匀分散的ORR活性位对于提高催化剂的ORR性能至关重要。在这里，我们合成了三（Fe / F / N）掺杂的多孔碳作为ORR的高效电催化剂，以Fe-沸石咪唑酸酯骨架8（Fe-ZIF-8）和氟化铵为前体。结果表明，与传统的20 wt％Pt / C在碱性和酸性介质中相比，所制备的FeFNC-5催化剂表现出优异的ORR活性，甲醇耐受性和长期稳定性，这是因为Fe–N x丰富且分散和吡啶-N活性位，高比表面积和分层多孔结构。这项工作为合成高效率ORR电催化剂Fe，F和N三重掺杂多孔碳提供了新方法和新见识。
更新日期：2020-09-24
中文翻译：
掺杂三（Fe / F / N）的多孔碳作为在碱性和酸性介质中进行氧还原反应的电催化剂。
开发低成本，可持续和高性能的不含贵金属的催化剂来代替铂基（Pt）催化剂用于燃料电池中的氧还原反应（ORR）已引起了广泛的关注。产生更丰富和更均匀分散的ORR活性位对于提高催化剂的ORR性能至关重要。在这里，我们合成了三（Fe / F / N）掺杂的多孔碳作为ORR的高效电催化剂，以Fe-沸石咪唑酸酯骨架8（Fe-ZIF-8）和氟化铵为前体。结果表明，与传统的20 wt％Pt / C在碱性和酸性介质中相比，所制备的FeFNC-5催化剂表现出优异的ORR活性，甲醇耐受性和长期稳定性，这是因为Fe–N x丰富且分散和吡啶-N活性位，高比表面积和分层多孔结构。这项工作为合成高效率ORR电催化剂Fe，F和N三重掺杂多孔碳提供了新方法和新见识。
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