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Holey Cobalt-Iron Nitride Nanosheet Arrays as High-Performance Bifunctional Electrocatalysts for Overall Water Splitting.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-06-05 , DOI: 10.1021/acsami.0c05219
Di Li 1 , Yingying Xing 1 , Rong Yang 2 , Tai Wen 2 , Deli Jiang 2 , Weidong Shi 2 , Shouqi Yuan 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-06-05 , DOI: 10.1021/acsami.0c05219
Di Li 1 , Yingying Xing 1 , Rong Yang 2 , Tai Wen 2 , Deli Jiang 2 , Weidong Shi 2 , Shouqi Yuan 1
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Designing efficient metal nitride electrocatalysts with advantageous nanostructures toward overall water splitting is of great significance for energy conversion. In this work, holey cobalt–iron nitride nanosheet arrays grown on Ni foam substrate (CoFeNx HNAs/NF) are prepared via a facile hydrothermal and subsequent thermal nitridation method. This unique HNA architecture can not only expose abundant active sites but also facilitate the charge/mass transfer. Resulting from these merits, the CoFeNx HNAs/NF exhibits high catalytic performance with overpotentials of 200 and 260 mV at 10 mA cm–2 for the hydrogen evolution reaction (HER) and 50 mA cm–2 for the oxygen evolution reaction (OER), respectively. Furthermore, when using CoFeNx-500 HNAs/NF as both anode and cathode, the alkaline electrolyzer could afford a current density of 10 mA cm–2 at 1.592 V, higher than many other metal nitride-based electrocatalysts. This work signifies a simple approach to prepare holey metal nitride nanosheet arrays, which can be applied in various fields of energy conversion and storage.
中文翻译:
有孔的氮化铁钴纳米片阵列作为用于整体水分解的高性能双功能电催化剂。
设计具有有利于整体水分解的有利纳米结构的高效金属氮化物电催化剂对于能量转换具有重要意义。在这项工作中,通过便捷的水热和随后的热氮化方法,制备了在泡沫镍上生长的多孔钴-氮化铁纳米片阵列(CoFeN x HNAs / NF)。这种独特的HNA架构不仅可以暴露丰富的活动站点,还可以促进电荷/质量转移。由于这些优点,CoFeN x HNAs / NF表现出很高的催化性能,在10 mA cm -2的氢气分解反应(HER)和50 mA cm -2的氧气分解反应(OER)的过电势分别为200和260 mV。, 分别。此外,使用CoFeN时x -500 HNAs / NF作为阳极和阴极,碱性电解器在1.592 V时可提供10 mA cm –2的电流密度,高于许多其他基于金属氮化物的电催化剂。这项工作标志着一种制备多孔金属氮化物纳米片阵列的简单方法,该方法可应用于能量转换和存储的各个领域。
更新日期:2020-07-01
中文翻译:

有孔的氮化铁钴纳米片阵列作为用于整体水分解的高性能双功能电催化剂。
设计具有有利于整体水分解的有利纳米结构的高效金属氮化物电催化剂对于能量转换具有重要意义。在这项工作中,通过便捷的水热和随后的热氮化方法,制备了在泡沫镍上生长的多孔钴-氮化铁纳米片阵列(CoFeN x HNAs / NF)。这种独特的HNA架构不仅可以暴露丰富的活动站点,还可以促进电荷/质量转移。由于这些优点,CoFeN x HNAs / NF表现出很高的催化性能,在10 mA cm -2的氢气分解反应(HER)和50 mA cm -2的氧气分解反应(OER)的过电势分别为200和260 mV。, 分别。此外,使用CoFeN时x -500 HNAs / NF作为阳极和阴极,碱性电解器在1.592 V时可提供10 mA cm –2的电流密度,高于许多其他基于金属氮化物的电催化剂。这项工作标志着一种制备多孔金属氮化物纳米片阵列的简单方法,该方法可应用于能量转换和存储的各个领域。