Abstract
Transition metal-based catalysts usually suffer from poor coke resistance during the dehydrogenation processes of hydrocarbon compounds in gas-solid heterogeneous systems, including methanol dehydrogenation. Herein, atomically dispersed Ni sites have been rationally anchored in nitrogen-doped carbon sheets (Ni-N4/NC), which could act as an integrated, active, and anticoking catalyst for methanol dehydrogenation with a high selectivity toward hydrogen and CO under 15 h-1 (weight hourly space velocities, WHSV) in a fixed-bed reactor. Both experimental and computational results reveal that the electronic structures of Ni-N4 sites promote the desorption of deep dehydrogenation product ethylene to release the Ni active centers, simultaneously giving a remarkably high H2 yield rate (1800 mol H2 mol-1 Ni h-1) and a high anticoking performance even under critical conditions.
Original language | English (US) |
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Pages (from-to) | 12569-12574 |
Number of pages | 6 |
Journal | ACS Catalysis |
Volume | 10 |
Issue number | 21 |
DOIs | |
State | Published - Nov 6 2020 |
Keywords
- anticoking
- fixed-bed reactor
- methanol dehydrogenation
- Ni-Nsites
- nitrogen-doped carbon
ASJC Scopus subject areas
- Catalysis
- General Chemistry