材料科学
过电位
电催化剂
分解水
电极
电解
制氢
碳纤维
电解水
碳化
纳米技术
化学工程
可逆氢电极
氢
工作电极
催化作用
复合材料
电解质
电化学
复合数
有机化学
化学
扫描电子显微镜
物理化学
光催化
工程类
作者
Di Li,Hao Cheng,Xixun Hao,Guoping Yu,Chen Qiu,Yuanhua Xiao,Hubiao Huang,Yingying Lü,Bing Zhang
标识
DOI:10.1002/adma.202304917
摘要
The sustainable and scalable fabrication of low-cost, efficient, and durable electrocatalysts that operate well at industrial-level current density is urgently needed for large-scale implementation of the water splitting to produce hydrogen. In this work, an integrated carbon electrode is constructed by encapsulating Ni nanoparticles within N-doped carbonized wood framework (Ni@NCW). Such integrated electrode with hierarchically porous structure facilitates mass transfer process for hydrogen evolution reaction (HER). Ni@NCW electrode can be employed directly as a robust electrocatalyst for HER, which affords the industrial-level current density of 1000 mA cm-2 at low overpotential of 401 mV. The freestanding binder-free electrode exhibits extraordinary stability for 100 h. An anion exchange membrane water electrolysis (AEMWE) electrolyzer assembled with such freestanding carbon electrode requires only a lower cell voltage of 2.43 V to achieve ampere-level current of 4.0 A for hydrogen production without significant performance degradation. These advantages reveal the great potential of this strategy in designing cost-effective freestanding electrode with monometallic, bimetallic, or trimetallic species based on abundant natural wood resources for water splitting.
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