双功能
电催化剂
材料科学
电池(电)
电化学
化学工程
纳米技术
碳纤维
催化作用
析氧
电极
复合材料
化学
复合数
有机化学
物理化学
功率(物理)
工程类
物理
量子力学
作者
Fuping Zhang,Long Chen,Haiyi Yang,Yinglin Zhang,Yuanyuan Peng,Xing Luo,Ayyaz Ahmad,Naveed Ramzan,Yisheng Xu,Yulin Shi
标识
DOI:10.1016/j.cej.2021.133734
摘要
Zeolitic imidazole frameworks (ZIFs) provide an exciting platform to design and fabricate non-precious-metal carbon-based catalysts for oxygen reduction/evolution reaction (ORR/OER). Herein, we elaborately design a facile enzyme-assisted synthetic strategy that enables to tailor the ZIFs precursors into structural stable decussation shape, which derived Co nanoislands grafted on decussate N-doped carbon nanoleaves ([email protected]) can well retain the interpenetrating nanostructure. Benefiting from the combined advantages of compositions and interpenetrating nanostructures, [email protected] possesses 5.2 times higher exposed electrochemical active area than the conventional dodecahedral one, thus endowing the superior bifunctional activity toward ORR and OER with a low potential gap (ΔE) of 0.866 V. When applicated in Zn-air battery, the [email protected] electrode displays a high peak power density of 115.4 mW cm−2 and energy density of 879.6 Wh kg−1 as well as excellent long-cycling stability more than 200 h, outperforming benchmark catalysts of Pt/C||RuO2. The work provides a promising way to construct ZIFs-derived non-precious-metal electrocatalyst for advanced metal-air batteries.
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