@article{Ding2023, 
author = {Jieting Ding and Danyu Guo and Anqian Hu and Xianfeng Yang and Kui Shen and Liyu Chen and Yingwei Li},
title = {Resisting metal aggregation in pyrolysis of MOFs towards high-density metal nanocatalysts for efficient hydrazine assisted hydrogen production},
year = {2023},
journal = {Nano Research},
volume = {16},
number = {5},
pages = {6067-6075},
keywords = {metal-organic frameworks, electrocatalysis, metal nanoparticles, overall hydrazine splitting, thermal transformation},
url = {https://www.sciopen.com/article/10.1007/s12274-022-4777-5},
doi = {10.1007/s12274-022-4777-5},
abstract = {The preparation of supported high-density metal nanoparticles (NPs) is of great importance to boost the performance in heterogeneous catalysis. Thermal transformation of metal-organic frameworks (MOFs) has been demonstrated as a promising route for the synthesis of supported metal NPs with high metal loadings, but it is challenge to achieve uniform metal dispersion. Here we report a strategy of “spatial isolation and dopant anchoring” to resist metal aggregation in the pyrolysis of MOFs through converting a bulk MOF into dual-heteroatom-containing flower-like MOF sheets (B/N-MOF-S). This approach can spatially isolate metal ions and increase the number of anchoring sites, thus efficiently building physical and/or chemical barriers to cooperatively prevent metal NPs from aggregation in the high-temperature transformation process. After thermolysis at 1,000 °C, the B/N-MOF-S affords B,N co-doped carbon-supported Co NPs (Co/BNC) with uniform dispersion and a high Co loading of 37.3 wt.%, while untreated bulk MOFs yield much larger sizes and uneven distribution of Co NPs. The as-obtained Co/BNC exhibits excellent electrocatalytic activities in both hydrogen evolution and hydrazine oxidation reactions, and only a voltage of 0.617 V at a high current density of 100 mA·cm−2 is required when applied to a two-electrode overall hydrazine splitting electrolyzer.}
}