期刊
NANOMATERIALS
卷 12, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/nano12030531
关键词
biomass; activated carbon; nanobundles; electrocatalysts; hydrogen evolution reaction
类别
资金
- National Research Foundation (NRF) of Korea through the Basic Science Research Programs [2016R1A6A1A03012877, 2019R1A2C1085448]
- Korean Government
- National Research Foundation of Korea [2019R1A2C1085448] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this study, high-performance partially graphitized activated-carbon nanobundles were synthesized through high-temperature KOH activation of biomass human hair ashes, serving as efficient electrocatalysts for hydrogen evolution reaction (HER).
Carbonaceous materials play a vital role as an appropriate catalyst for electrocatalytic hydrogen production. Aiming at realizing the highly efficient hydrogen evolution reaction (HER), the partially graphitized activated-carbon nanobundles were synthesized as a high-performance HER electrocatalyst by using biomass human hair ashes through the high-temperature KOH activation at two different temperatures of 600 and 700 degrees C. Due to the partial graphitization, the 700 degrees C KOH-activated partially graphitized activated-carbon nanobundles exhibited higher electrical conductivity as well as higher textural porosity than those of the amorphous activated-carbon nanobundles that had been prepared by the KOH activation at 600 degrees C. As a consequence, the 700 degrees C-activated partially graphitized activated-carbon nanobundles showed the extraordinarily high HER activity with the very low overpotential (approximate to 16 mV at 10 mA/cm(2) in 0.5 M H2SO4) and the small Tafel slope (approximate to 51 mV/dec). These results suggest that the human hair-derived partially graphitized activated-carbon nanobundles can be effectively utilized as a high-performance HER electrocatalyst in future hydrogen-energy technology.
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