期刊
SMALL
卷 14, 期 24, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201800759
关键词
2D materials; hierarchical structures; layered metal hydroxides; magnesium oxide; water splitting
类别
资金
- MOST of China [2015CB932300, 2017YFA0207302]
- NSFC [21301144, 21390390, 21420102001, 21131005, 21333008]
- fundamental research funds for the central universities [20720160080]
2D layered metal hydroxides (LMH) are promising materials for electrochemical energy conversion and storage. Compared with exfoliation of bulk layered materials, wet chemistry synthesis of 2D LMH materials under mild conditions still remains a big challenge. Here, an MgO-mediated strategy for mass production of various 2D LMH nanosheets is presented by hydrolyzing MgO in metal salt aqueous solutions at room temperature. Benefiting from this economical and scalable strategy, ultrathin LMH nanosheets (M = Ni, Fe, Co, NiFe, and NiCo) and their derivatives (e.g., metal oxides and sulfides) can be synthesized in high yields. More importantly, this strategy opens up opportunities to fabricate hierarchically structured LMH nanosheets, resulting in high-performance electrocatalysts for the oxygen-and hydrogen-evolution reactions to realize stable overall water splitting with a low cell voltage of 1.55 V at 10 mA cm(-2). This work provides a powerful platform for the synthesis and applications of 2D materials.
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