Abstract
Cyclohexane can serve as a good dihydrogen (H2) carrier and a safer medium to store and transport H2, as it is liquid under ambient conditions and it has a relatively high hydrogen density per unit volume (0.056 g(H2)/cm3(Cy)liq.). However, cyclohexane can release H2 only with efficient cyclohexane dehydrogenation catalysts. Here, we report the synthesis of three-dimensional micron-sized block carbon-molybdenum carbide (BCMC) composite materials that can serve as noble-metal-free catalysts for cyclohexane dehydrogenation. The materials are synthesized by a facile hydrothermal synthetic route, and their structures and morphologies are characterized by various analytical techniques. The results show that the BCMCs, along with specific morphologies, form when a source of Mo is included in the precursor and that the sizes of the microparticles in them can be tailored by changing the relative amount of Mo used for their synthesis. The as-synthesized BCMC materials exhibit high catalytic activity for cyclohexane dehydrogenation while remaining stable and maintaining their catalytic activities during the reaction. The materials' catalytic activity increases as the amount of Mo used to make the materials is increased. This is further found to be because the BCMC materials containing higher amounts of ammonium molybdate or higher densities of Mo2C provide substantially lower activation energies for the reaction. These materials can be expected to find industrial applications for catalytic production of H2 from hydrocarbons.
| Original language | English |
|---|---|
| Pages (from-to) | 10773-10780 |
| Number of pages | 8 |
| Journal | ACS Omega |
| Volume | 3 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - Sep 30 2018 |
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ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)
Cite this
Efficient Catalysts for Cyclohexane Dehydrogenation Synthesized by Mo-Promoted Growth of 3D Block Carbon Coupled with Mo2C. / Wang, Hui; Zhang, Na; Liu, Rui; Zhao, Ruihua; Guo, Tianyu; Li, Jinping; Asefa, Teddy; Du, Jianping.
In: ACS Omega, Vol. 3, No. 9, 30.09.2018, p. 10773-10780.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Efficient Catalysts for Cyclohexane Dehydrogenation Synthesized by Mo-Promoted Growth of 3D Block Carbon Coupled with Mo2C
AU - Wang, Hui
AU - Zhang, Na
AU - Liu, Rui
AU - Zhao, Ruihua
AU - Guo, Tianyu
AU - Li, Jinping
AU - Asefa, Teddy
AU - Du, Jianping
PY - 2018/9/30
Y1 - 2018/9/30
N2 - Cyclohexane can serve as a good dihydrogen (H2) carrier and a safer medium to store and transport H2, as it is liquid under ambient conditions and it has a relatively high hydrogen density per unit volume (0.056 g(H2)/cm3(Cy)liq.). However, cyclohexane can release H2 only with efficient cyclohexane dehydrogenation catalysts. Here, we report the synthesis of three-dimensional micron-sized block carbon-molybdenum carbide (BCMC) composite materials that can serve as noble-metal-free catalysts for cyclohexane dehydrogenation. The materials are synthesized by a facile hydrothermal synthetic route, and their structures and morphologies are characterized by various analytical techniques. The results show that the BCMCs, along with specific morphologies, form when a source of Mo is included in the precursor and that the sizes of the microparticles in them can be tailored by changing the relative amount of Mo used for their synthesis. The as-synthesized BCMC materials exhibit high catalytic activity for cyclohexane dehydrogenation while remaining stable and maintaining their catalytic activities during the reaction. The materials' catalytic activity increases as the amount of Mo used to make the materials is increased. This is further found to be because the BCMC materials containing higher amounts of ammonium molybdate or higher densities of Mo2C provide substantially lower activation energies for the reaction. These materials can be expected to find industrial applications for catalytic production of H2 from hydrocarbons.
AB - Cyclohexane can serve as a good dihydrogen (H2) carrier and a safer medium to store and transport H2, as it is liquid under ambient conditions and it has a relatively high hydrogen density per unit volume (0.056 g(H2)/cm3(Cy)liq.). However, cyclohexane can release H2 only with efficient cyclohexane dehydrogenation catalysts. Here, we report the synthesis of three-dimensional micron-sized block carbon-molybdenum carbide (BCMC) composite materials that can serve as noble-metal-free catalysts for cyclohexane dehydrogenation. The materials are synthesized by a facile hydrothermal synthetic route, and their structures and morphologies are characterized by various analytical techniques. The results show that the BCMCs, along with specific morphologies, form when a source of Mo is included in the precursor and that the sizes of the microparticles in them can be tailored by changing the relative amount of Mo used for their synthesis. The as-synthesized BCMC materials exhibit high catalytic activity for cyclohexane dehydrogenation while remaining stable and maintaining their catalytic activities during the reaction. The materials' catalytic activity increases as the amount of Mo used to make the materials is increased. This is further found to be because the BCMC materials containing higher amounts of ammonium molybdate or higher densities of Mo2C provide substantially lower activation energies for the reaction. These materials can be expected to find industrial applications for catalytic production of H2 from hydrocarbons.
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U2 - 10.1021/acsomega.8b01411
DO - 10.1021/acsomega.8b01411
M3 - Article
AN - SCOPUS:85053247679
VL - 3
SP - 10773
EP - 10780
JO - ACS Omega
JF - ACS Omega
SN - 2470-1343
IS - 9
ER -