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- Title
Co-CoO@carbon core-shells derived from metal−organic framework nanocrystals as efficient hydrogen evolution catalysts.
- Authors
Liu, Yanyan; Han, Guosheng; Zhang, Xiaoyu; Xing, Congcong; Du, Chenxia; Cao, Huaqiang; Li, Baojun
- Abstract
Controllable pyrolysis of metal−organic frameworks (MOFs) in confined spaces is a promising strategy for the design and development of advanced functional materials. In this study, Co-CoO@carbon composites were synthesized via pyrolysis of a Co-MOFs@glucose polymer (Co-MOFs@GP) followed by partial oxidation of Co nanoparticles (NPs). The pyrolysis of Co-MOFs@GP generated a core-shell structure composed of carbon shells and Co NPs. The controlled partial oxidation of Co NPs formed Co-CoO heterojunctions confined in carbon shells. Compared with Co-MOFs@GP and Co@carbon- n (Co@C- n), Co-CoO@carbon- n (Co-CoO@C- n) exhibited higher catalytic activity during NaBH hydrolysis. Co-CoO@C-II provided a maximum specific H generation rate of 5,360 mL·min·g at room temperature due to synergistic interactions between Co and CoO NPs. The Co NPs also endowed Co-CoO@C- n with the ferromagnetism needed to complete the magnetic momentum transfer process. This assembly-pyrolysis-oxidation strategy may be an efficient method of preparing novel nanocomposites.
- Publication
Nano Research, 2017, Vol 10, Issue 9, p3035
- ISSN
1998-0124
- Publication type
Article
- DOI
10.1007/s12274-017-1519-1