Journal
APPLIED CATALYSIS A-GENERAL
Volume 608, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcata.2020.117887
Keywords
Nitrogen dopant; Electron modification; Palladium; Hydrogen; Formic acid
Categories
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning (MSIP) [NRF-2016R1A5A1009592]
- National Research Foundation of Korea [2016R1A5A1009592, 4120200413705] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Nitrogen dopant is known to promote the activity of active metal in various catalytic reactions. Herein, the role of nitrogen dopant in formic acid dehydrogenation was investigated by synthesizing nitrogen-doped mesoporous carbon (NMC) with different nitrogen contents and impregnating Pd particles on these supports (Pd/NMC). The nitrogen dopant made Pd particles small and modified the electronic state of Pd, resulting in the enhanced formic acid dehydrogenation activity. However, an excess interaction between Pd and nitrogen dopant raised the activation barrier of the formic acid dehydrogenation. This experimental result is consistent with the previously reported computational prediction. Hence, this study suggests that the optimum nitrogen doping is required to efficiently improve the catalytic activity for hydrogen production from formic acid. In addition, the hydrogen production rate was further improved by using sodium formate as an additive, resulting in the TOF value of 4821 h(-1) at 65 degrees C.
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