Enhanced metal-support interaction in Ni/Co3O4/TiO2 nanorods toward stable and dynamic hydrogen production from phenol steam reforming
The fabrication of highly stable Ni and Co3O4 nanocube-supported TiO2 nanorods (NRs) catalysts with improved metal-support interaction for steam reforming of phenol (SRP) has been investigated. An enhanced catalytic performance of Ni/Co3O4/TiO2 NRs with H2 -rich gas and hardly formed coke was achiev...
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| Main Authors: | , , |
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| Format: | Article |
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American Chemical Society
2019
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| Subjects: | |
| Online Access: | http://eprints.utm.my/id/eprint/87631/ http://dx.doi.org/10.1021/acs.iecr.8b03542 |
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| Summary: | The fabrication of highly stable Ni and Co3O4 nanocube-supported TiO2 nanorods (NRs) catalysts with improved metal-support interaction for steam reforming of phenol (SRP) has been investigated. An enhanced catalytic performance of Ni/Co3O4/TiO2 NRs with H2 -rich gas and hardly formed coke was achieved and rationalized with spectroscopic results and structural assessments. Over 10% Ni/5% Co3O4/TiO2 NRs, SRP and water gas shift reactions dominate, producing mostly H 2 and CO2, yet Ni/TiO2 microparticles promoted CO. With catalyst loading, steam-to-carbon ratio, and gas hourly space velocity, the H 2 yield was improved with higher CO2/CO ratio and low CO yield. A Ni/Co3O4/TiO2 NRs catalyst possesses excellent stability, which prevailed for more than 100 h without obvious deactivation. The high performance was due to a 1D TiO2 NRs/Co3O4 nanocubes heterojunction, good metal dispersion, and higher reducibility, thereby providing a strong interaction of bimetallic active sites. This study reveals that Co3O4 promotes Ni/TiO2 NRs activity and stability toward H2 production and is promising for commercial applications. |
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