MOE Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, School of Chemistry, and ‡Instrumental Analysis and Research Centre, Sun Yat-sen University , Guangzhou 510275, China.
ACS Appl Mater Interfaces. 2017 Oct 11;9(40):34954-34960. doi: 10.1021/acsami.7b10609. Epub 2017 Sep 26.
Herein, NiFeOOH/NiFe/NiFeOOH sandwich-structured nanotube arrays (SNTAs) supported on carbon fiber cloth (CFC) (NiFeOOH/NiFe/NiFeOOH SNTAs-CFC) have been developed as flexible high-performance oxygen evolution reaction (OER) catalysts by a facile in situ electrochemical oxidation of NiFe metallic alloy nanotube arrays during oxygen evolution process. Benefiting from the advantages of high conductivity, hollow nanotube array, and porous structure, NiFeOOH/NiFe/NiFeOOH SNTAs-CFC exhibited a low overpotential of ∼220 mV at the current density of 10 mA cm and a small Tafel slope of 57 mV dec in alkaline solution, both of which are smaller than those of most OER electrocatalysts. Furthermore, NiFeOOH/NiFe/NiFeOOH SNTAs-CFC exhibits excellent stability at 100 mA cm for more than 30 h. It is believed that the present work can provide a valuable route for the design and synthesis of inexpensive and efficient OER electrocatalysts.
在此，通过在析氧过程中对 NiFe 金属合金纳米管阵列进行简便的原位电化学氧化，制备了负载在碳纤维布 (CFC) 上的 NiFeOOH/NiFe/NiFeOOH 三明治结构纳米管阵列 (NiFeOOH/NiFe/NiFeOOH SNTAs-CFC)，作为柔性高性能析氧反应 (OER) 催化剂。受益于高导电性、中空纳米管阵列和多孔结构的优势，NiFeOOH/NiFe/NiFeOOH SNTAs-CFC 在碱性溶液中的电流密度为 10 mA cm 时表现出低的过电位约 220 mV，小的塔菲尔斜率为 57 mV dec，均小于大多数 OER 电催化剂。此外，NiFeOOH/NiFe/NiFeOOH SNTAs-CFC 在 100 mA cm 下表现出超过 30 h 的优异稳定性。相信本工作可为设计和合成廉价高效的 OER 电催化剂提供一条有价值的途径。
