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Nitrogen-Doped Carbon Nanotube–Graphene Frameworks with Encapsulated Fe/Fe3N Nanoparticles as Catalysts for Oxygen Reduction
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2019-05-15 00:00:00 , DOI: 10.1021/acsanm.9b00506 Yan Zheng 1 , Fei He 1 , Jiaming Wu 1 , Delong Ma 1 , Huailin Fan 1 , Shufei Zhu 1 , Xiang Li 1 , Yizhong Lu 1 , Qing Liu 2 , Xun Hu 1
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2019-05-15 00:00:00 , DOI: 10.1021/acsanm.9b00506 Yan Zheng 1 , Fei He 1 , Jiaming Wu 1 , Delong Ma 1 , Huailin Fan 1 , Shufei Zhu 1 , Xiang Li 1 , Yizhong Lu 1 , Qing Liu 2 , Xun Hu 1
Affiliation
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Iron (Fe)- and nitrogen (N)-codoped carbon materials hold broad application prospects in the oxygen reduction reaction (ORR) because of their abundant reserves, low cost, and excellent catalytic activity. In this study, a N-doped carbon nanotube (CNT)–graphene framework with encapsulated Fe/Fe3N nanoparticles (Fe–N–[email protected]) is designed and synthesized by annealing a mixture of iron acetylacetonate, dicyandiamide, and graphene oxide via a one-step calcination strategy. Fe–N–[email protected] has a better ORR catalytic activity than reduced graphene oxide (RGO), N-doped graphene, and N-doped CNTs with encapsulated Fe/Fe3N nanoparticles with respect to the onset potential, limiting current density, and kinetic current density. Fe–N–[email protected] also has high stability and a high discharging cell voltage, which approaches those of platinum/carbon in zinc–air batteries. The relationship between the structure and activity of Fe–N–[email protected] demonstrates that the high density of Fe–N and pyridinic N sites, moderate wettability, and positive ζ potential promote exposure of the active sites, accelerate the transmission of hydrated oxygen, and enhance the adsorption of HO2– for the 4e– ORR.
中文翻译：
包封的Fe / Fe 3 N纳米颗粒的氮掺杂碳纳米管-石墨烯骨架作为氧还原催化剂
铁（Fe）和氮（N）掺杂的碳材料储量丰富，成本低，催化活性优异，因此在氧还原反应（ORR）中具有广阔的应用前景。在这项研究中，通过对乙酰丙酮铁，双氰胺和石墨烯的混合物进行退火，设计并合成了具有包封的Fe / Fe 3 N纳米颗粒（Fe–N– [受电子邮件保护]）的N掺杂碳纳米管（CNT）-石墨烯骨架。通过一步煅烧策略生成氧化物。Fe–N– [受电子邮件保护]具有比还原的氧化石墨烯（RGO），N掺杂的石墨烯和N /掺杂的Fe / Fe 3 CNT更好的ORR催化活性。关于起始电位，极限电流密度和动电流密度的N纳米粒子。Fe–N–（受电子邮件保护）还具有高稳定性和高放电电池电压，接近锌空气电池中的铂/碳。Fe–N–的结构与活性之间的关系[受电子邮件保护]表明，Fe–N和吡啶二价氮位点的高密度，适度的润湿性和正ζ电位可促进活性位点的暴露，加速水合氧的传输，并增强HO 2 –对4e – ORR的吸附。
更新日期：2019-05-15
中文翻译：
包封的Fe / Fe 3 N纳米颗粒的氮掺杂碳纳米管-石墨烯骨架作为氧还原催化剂
铁（Fe）和氮（N）掺杂的碳材料储量丰富，成本低，催化活性优异，因此在氧还原反应（ORR）中具有广阔的应用前景。在这项研究中，通过对乙酰丙酮铁，双氰胺和石墨烯的混合物进行退火，设计并合成了具有包封的Fe / Fe 3 N纳米颗粒（Fe–N– [受电子邮件保护]）的N掺杂碳纳米管（CNT）-石墨烯骨架。通过一步煅烧策略生成氧化物。Fe–N– [受电子邮件保护]具有比还原的氧化石墨烯（RGO），N掺杂的石墨烯和N /掺杂的Fe / Fe 3 CNT更好的ORR催化活性。关于起始电位，极限电流密度和动电流密度的N纳米粒子。Fe–N–（受电子邮件保护）还具有高稳定性和高放电电池电压，接近锌空气电池中的铂/碳。Fe–N–的结构与活性之间的关系[受电子邮件保护]表明，Fe–N和吡啶二价氮位点的高密度，适度的润湿性和正ζ电位可促进活性位点的暴露，加速水合氧的传输，并增强HO 2 –对4e – ORR的吸附。
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