双功能
电催化剂
钴
过电位
催化作用
氧气
化学
析氧
碳纤维
无机化学
材料科学
化学工程
纳米技术
电化学
电极
复合数
有机化学
物理化学
复合材料
工程类
作者
Ghulam Yasin,Sajjad Ali,Shumaila Ibraheem,Anuj Kumar,Mohammad Tabish,Muhammad Mushtaq,Saira Ajmal,Muhammad Arif,Muhammad Abubaker Khan,Ali Saad,Liang Qiao,Wei Zhao
标识
DOI:10.1021/acscatal.2c05654
摘要
Single-atom introduced carbon nanomaterials show favorable oxygen-reduction reaction (ORR) and oxygen-evolution reaction (OER) performance for renewable energy applications. Nevertheless, the electronic-structure regulation by decorating heterogeneous single-metal-atoms and the engineering of a single-atom active-sites’ microenvironment need to be optimized simultaneously, which is challenging. Herein, we develop an atomic-interfacial-regulation approach to fabricate dual single Fe/Co atoms synchronized with both nitrogen/sulfur atoms on defective/graphitic/porous carbon nanosheets (Fe,Co/DSA-NSC). The unsymmetrically organized N and S coordinated Fe/Co bridged atomic-sites [Fe-(N2S)/Co-(N2S) moiety] are established to prompt charge-transfer, lowering the energy barrier of oxygenated reaction-intermediates and leading to boost the reaction-kinetics. As estimated, the Fe,Co/DSA-NSC exhibits an improved ORR/OER activity with higher half-wave potential and lower overpotential (E1/2 = 879 mV and η10 = 210 mV, respectively) and also good cycling stability toward zinc-air batteries. This discovery hence provides a widespread scheme for the synergistic-principles of dual-single-atom catalysts and controlled regulation of an active-sites’ microenvironment toward energy applications.
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