Cytomembrane‐Structure‐Inspired Active Ni–N–O Interface for Enhanced Oxygen Evolution Reaction
Surface/interface design is one of the most significant and promising motivations to develop high‐performance catalysts for electrolytic water splitting. Here, the nature of cytomembrane having the most effective and functional surface structure is mimicked to fabricate a new configuration of Ni–N–O...
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Veröffentlicht in: | Advanced materials (Weinheim) 2018-09, Vol.30 (39), p.e1803367-n/a |
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Sprache: | eng |
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Zusammenfassung: | Surface/interface design is one of the most significant and promising motivations to develop high‐performance catalysts for electrolytic water splitting. Here, the nature of cytomembrane having the most effective and functional surface structure is mimicked to fabricate a new configuration of Ni–N–O porous interface nanoparticles (NiNO INPs) with strongly interacting nanointerface between the Ni3N and NiO domains, for enhancing the electrocatalytic oxygen evolution reaction (OER) performance. The combination of transmission electron microscopy and electrochemical investigations, tracking the correlation between microstructure evolution and catalytic activity, demonstrate the strongly coupled nanointerface for an approximately sixfold improvement of electrolytic efficiency. Density functional theory simulates the electrocatalytic process with a maximum of 85% reduction of the energy barrier. Further investigations find that the real active site for the OER in the NiNO INPs is the strongly coupled Ni–N–O nanointerface, not the derived amorphous hydroxide, during the OER process. The determination of the correlation of constructed nanointerface with catalytic properties suggests a significant strategy toward the rational design of catalysts for efficient water electrocatalysis.
A new form of Ni–N–O porous interface nanoparticles, inspired by the biomembrane structure, exhibits a sixfold‐enhanced electrolytic efficiency and a maximum of 85% reduction of the energy barrier for the rate‐limited *OOH reaction. The high performance is mainly contributed by the strongly coupled Ni–N–O interface. |
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ISSN: | 0935-9648 1521-4095 |
DOI: | 10.1002/adma.201803367 |