介孔铁氮共掺杂碳材料作为阴离子交换膜燃料电池的阴极催化剂

IF 5.4 Q2 CHEMISTRY, PHYSICAL Journal of Power Sources Advances Pub Date : 2021-04-01 DOI:10.1016/j.powera.2021.100052
Jaana Lilloja , Marek Mooste , Elo Kibena-Põldsepp , Ave Sarapuu , Barr Zulevi , Arvo Kikas , Helle-Mai Piirsoo , Aile Tamm , Vambola Kisand , Steven Holdcroft , Alexey Serov , Kaido Tammeveski
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引用次数: 32

摘要

介绍了一种新型的电催化剂,并将其用作阴离子交换膜燃料电池(AEMFC)的阴极催化剂。催化剂材料由Pajarito Powder, LLC采用VariPore™方法制备,并使用铁和氮作为掺杂剂,使其成为介孔过渡金属-氮-碳型催化剂。理化表征表明,掺杂成功,具有几乎完全的介孔结构(平均孔径约为7 nm),具有较高的比表面积。通过旋转环盘电极法对氧还原反应(ORR)活性的初步评价表明,该材料在碱性介质中表现出良好的电催化性能,半波电位为0.89 V。该催化剂材料作为阴离子交换膜燃料电池正极,具有与pt基材料相当的AEMFC性能。该材料的高ORR电催化活性是由于氮基团(吡咯- n、吡啶- n和石墨- n)与铁的协同作用以及高介孔性质。
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Mesoporous iron-nitrogen co-doped carbon material as cathode catalyst for the anion exchange membrane fuel cell

A novel and commercially available electrocatalyst is characterised and used as cathode catalyst in an anion-exchange membrane fuel cell (AEMFC). The catalyst material is prepared using VariPore™ method by Pajarito Powder, LLC, and as dopants iron and nitrogen are used, making it a mesoporous transition metal-nitrogen-carbon type catalyst. The physico-chemical characterisation shows the success of doping as well as almost completely mesoporous structure (average pore size of approximately 7 nm) with high specific surface area. The initial assessment of the oxygen reduction reaction (ORR) activity by the rotating ring-disc electrode method reveals that the material exhibits a very good electrocatalytic performance in alkaline media having a half-wave potential of 0.89 V. The catalyst material is employed as an anion exchange membrane fuel cell cathode and it shows AEMFC performance as good as that of the Pt-based material. The high ORR electrocatalytic activity of this material is due to the synergy of nitrogen-moieties, namely pyrrolic-N, pyridinic-N and graphitic-N, with iron as well as the highly mesoporous nature.

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来源期刊
CiteScore
9.10
自引率
0.00%
发文量
18
审稿时长
64 days
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