期刊
SMALL
卷 16, 期 41, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201906564
关键词
alkali-etching; electrocatalysis; metal-organic frameworks (MOFs); open metal sites; overall water splitting
类别
资金
- National Natural Science Foundation of China [21606006, 51621003, 21771012]
- Beijing Natural Science Foundation [2174064]
The exploration of efficient electrocatalysts is the central issue for boosting the overall efficiency of water splitting. Herein, pertinently creating active sites and improving conductivity for metal-organic frameworks (MOFs) is proposed to tailor electrocatalytic properties for overall water splitting. An Ni(II)-MOF nanosheet array is presented as an ideal material model and a facile alkali-etched strategy is developed to break its Ni-O bonds accompanied with the introduction of extra-framework K cations, which contribute to creating highly active open metal sites and largely improving the electrical conductivity. As a result, the assembled defect-Ni-MOF||defect-Ni-MOF electrolyte cell delivers a lower and stable voltage of 1.50 V at 10 mA cm(-2)in alkaline medium for overall water splitting, comparable to the combination of iridium and platinum as benchmark catalysts.
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