电催化剂
双功能
纳米颗粒
碳纳米管
材料科学
原位
兴奋剂
碳纤维
纳米技术
化学工程
催化作用
化学
电极
电化学
物理化学
复合材料
有机化学
光电子学
复合数
工程类
作者
Zhiwei Lu,Qianqian Xiong,Rao Fu,Yan Wang,Zhang Lan,Minglei Yan,Wu Chun,Mengmeng Sun,Gehong Su,Sheng Wang,Jianshan Ye,Hanbing Rao
标识
DOI:10.1016/j.ijhydene.2024.02.283
摘要
The development of efficient, inexpensive, and stable bifunctional non-noble metal catalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is of practical significance for the large-scale application of zinc-air batteries. Here, a novel bifunctional Co-based nano-catalyst (Co@CxNyC) is fabricated by complexation-reduction and high-temperature pyrolysis method. Co nanoparticles were loaded in nitrogen-doped hollow irregular carbon nanotubes derived from natural fibers and carbon quantum dots. Remarkably, the unique hollow structure and the Co-Nx active site make the screened Co@C1N3C have efficient ORR&OER catalytic performance. Co@C1N3C with onset potential (0.90 V) and half-wave potential (0.84 V) exhibited an efficient 4e− transfer path and favorable stability and methanol tolerance. Moreover, the overpotential of Co@C1N3C needed to achieve 100 mA cm−2 is 625 mV, which is 31 mV better than that of RuO2. In conclusion, this work not only provides deep insights into the catalytic activity of Co@CxNyC nanocomposite as ORR&OER bifunctional electrocatalysts but also guides the growth of Co-based bifunctional catalysts.
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