过电位
材料科学
范德瓦尔斯力
石墨烯
异质结
分解水
双功能
纳米技术
化学工程
催化作用
光电子学
物理化学
分子
电极
光催化
物理
电化学
生物化学
量子力学
工程类
化学
作者
Jingyun Jiang,Pengfei Yan,Yannan Zhou,Zhenfeng Cheng,Xinwei Cui,Yifei Ge,Qun Xu
标识
DOI:10.1002/aenm.202002214
摘要
Abstract The design and synthesis of 2D heterostructured materials for water splitting are normally based on van der Waals (vdW) nanosheets, but this approach is gradually approaching a performance ceiling in terms of activity and stability. Herein, a novel heterostructured system is explored based on 2D non‐vdW and conductive nanosheets. Notably, the interplanar growth of 2D non‐vdW Co 2 N nanosheets is realized between graphene layers in the current collector of carbon fiber papers (CPs), generating an interlocking structure within CPs. The exposed surface of Co 2 N nanosheets possesses a high surface energy that anchors highly active CoNC, forming 2D CoNC@Co 2 N heterostructures outside CPs. This integrated electrocatalytic system bridged by non‐vdW Co 2 N nanosheets presents a low overpotential of 1.52 V and an excellent stability of 280 h, which outperform most bifunctional and nonprecious‐metal‐based electrocatalysts in alkaline media, owing to the nature of 2D non‐vdW nanosheets and the formation of strong and conductive connections among CoNC, nanosheets, and CPs.
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