双金属
双功能
木质素
析氧
碳纤维
材料科学
分解水
复合材料
双功能催化剂
电解水
纳米复合材料
化学工程
电解
化学
无机化学
纳米技术
催化作用
复合数
电化学
有机化学
电极
电解质
光催化
物理化学
工程类
作者
Hui Li,Weiyang Ma,Xiaoling Ma,Min Guo,Guoning Li
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2022-11-28
卷期号:10 (49): 16214-16224
被引量:8
标识
DOI:10.1021/acssuschemeng.2c04597
摘要
Rational design of biomass-derived carbon nanocomposites as bifunctional catalysts of the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) is of great significance for both the high-valued utilization of biomass waste and the practical application of water splitting. Herein, a novel multifunctional salt-assisted strategy consisting of surface/interface engineering is proposed to achieve a lignin-derived bifunctional catalysts of OER and HER using potassium hexacyanocobaltate (PHC) as the multifunctional modifying agent and lignin as the carbon precursor. PHC can not only induce Co-based components and nitrogen doping but also dramatically improve pore structure. Profiting from the surface-interface synergistic structures of Ru–Co multiple active components and hierarchical porous carbon support with high surface area, the RuCo-NC-120 catalyst shows superior activities toward OER and HER with the overpotentials of 242 and 52 mV at 10 mA cm–2, respectively. As a consequence, the RuCo-NC-120-based alkali electrolyzer only needs a cell voltage of 1.531 and 1.825 V to achieve 10 and 200 mA cm–2, respectively, and possesses excellent long-term stability. This study provides a novel strategy to effectively regulate the composition, morphology, and pore structure of the lignin-derived carbon, and it may open new avenues for high-value utilization of lignin.
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