Unravelling the K-promotion effect in highly active and stable Fe5C2nanoparticles for catalytic linear α-olefin production

Jin Hee Lee, Hack Keun Lee, Kwangsoo Kim, Geun Bae Rhim, Min Hye Youn, Heondo Jeong, Jong Hyeok Park, Dong Hyun Chun, Byung Hyun Kim, Ji Chan Park

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


C5-C13 linear alpha(α) olefins (LAOs) are high-value-added chemicals acknowledged by industry. However, using catalysts to elevate the activity and selectivity of LAOs remains a major challenge for Fischer-Tropsch synthesis (FTS). Recently, researchers on catalyst design have reported enhanced LAO production via FTS, but a more detailed understanding of the electron interactions between the active particles and hydrocarbon products is still needed. In the present paper, we report theoretical and experimental results of a potassium (K)-promotion effect on an optimized iron-carbide nanocatalyst (i.e. a carbon-encapsulated iron-carbide nanoparticle supported on nitrogen-doped porous carbon: Fe5C2@C/NPC). The K-doped Fe5C2@C/NPC nanocatalyst shows excellent catalytic performance with a high CO conversion of up to 96.7% at 78 h time-on-stream, C5-C13 LAO selectivity of 16.5% and productivity of 5.9 CH2 μmol gcat-1 s-1, compared to those of the K-free Fe5C2@C/NPC catalyst. The computer simulation model also supports the positive effects of the catalyst with a small amount of K (ca. 1 wt%, K/Fe = 0.05) in the FTS reaction, which well-matched the experimental results.

Original languageEnglish
Pages (from-to)1050-1058
Number of pages9
JournalMaterials Advances
Issue number3
Publication statusPublished - 2021

Bibliographical note

Funding Information:
This work was conducted within the framework of a research and development program of the Korea Institute of Energy Research (C0-2419-02) and funded by the National Research Foundation of Korea (NRF) grant funded by the Korea government (No. 2019R1A2C2086827). This work was also supported by the National Supercomputing Center with supercomputing resources including technical support (KSC-2019-CRE-0202).

Publisher Copyright:
© The Royal Society of Chemistry.

All Science Journal Classification (ASJC) codes

  • Chemistry (miscellaneous)
  • Materials Science(all)


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