@article{Liu2017, 
author = {Yanyan Liu and Guosheng Han and Xiaoyu Zhang and Congcong Xing and Chenxia Du and Huaqiang Cao and Baojun Li},
title = {Co-Co3O4@carbon core–shells derived from metal-organic framework nanocrystals as efficient hydrogen evolution catalysts},
year = {2017},
journal = {Nano Research},
volume = {10},
number = {9},
pages = {3035-3048},
keywords = {pyrolysis, core–shell, synergistic effect, Co-metal-organic frameworks (MOFs), NaBH4 hydrolysis},
url = {https://www.sciopen.com/article/10.1007/s12274-017-1519-1},
doi = {10.1007/s12274-017-1519-1},
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-Co3O4@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-Co3O4 heterojunctions confined in carbon shells. Compared with Co-MOFs@GP and Co@carbon-n (Co@C-n), Co-Co3O4@carbon-n (Co-Co3O4@C-n) exhibited higher catalytic activity during NaBH4 hydrolysis. Co-Co3O4@C-II provided a maximum specific H2 generation rate of 5, 360 mL·min-1·gCo-1 at room temperature due to synergistic interactions between Co and Co3O4 NPs. The Co NPs also endowed Co-Co3O4@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.}
}