Rapid synthesis of size-tunable transition metal carbide nanodots under ambient conditions
| Autor: | Guoqun Zhang, Liukang Xiong, Jiabin Wu, Liang Huang, Jun Zhou, Zhimi Hu, Jun Wan, Xiang Gao, Hongrun Jin |
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| Rok vydání: | 2019 |
| Předmět: |
Tafel equation
Nanostructure Materials science Renewable Energy Sustainability and the Environment Nanoparticle 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Electrocatalyst Catalysis Carbide Transition metal Chemical engineering General Materials Science Nanodot 0210 nano-technology |
| Zdroj: | Journal of Materials Chemistry A. 7:14489-14495 |
| ISSN: | 2050-7496 2050-7488 |
| DOI: | 10.1039/c9ta03895g |
| Popis: | Transition metal carbides (TMCs) have attracted great interest due to their potential for application in energy conversion and electrocatalysis. However, their nanostructures are difficult to control, especially in the case of TMC nanodots since their growth process usually requires high carburization temperature which could cause easy agglomeration of small size nanoparticles. Here, we develop a microwave combustion method for rapid (∼2 min) synthesis of TMC nanodots with tunable size from ∼3 to ∼40 nm under ambient conditions. These TMC nanodots exhibit outstanding catalytic performance for the hydrogen evolution reaction (HER) with low onset overpotentials of 19 and 27 mV vs. RHE as well as small Tafel slopes of 39 and 45 mV dec−1 in H2SO4 and KOH, respectively. This work highlights a novel strategy for the design and synthesis of transition metal carbides. |
| Databáze: | OpenAIRE |
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