期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 258, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2019.117946
关键词
Dry reforming of methane; Hydrogen; Bifunctional; Core-shell; Chemical looping
资金
- Swiss National Science Foundation [IZERZ0_141976]
- ETH SEED grant [SEED-02 17-2]
- Swiss National Science Foundation (SNF) [IZERZ0_141976] Funding Source: Swiss National Science Foundation (SNF)
We report on the development of a bifunctional catalyst (Pt) - oxygen carrier (Fe2O3) that integrates the dry reforming of methane (DRM) into the chemical looping - based production of hydrogen. The material exhibits a high and stable methane conversion ((similar to)80%) and hydrogen yield (10.8 mmol/g catalyst-oxygen carrier) with only a small quantity of impurities (CO, CO2 < 2 ppm). The structural changes of the material are followed by operando X-ray powder diffraction and X-ray absorption spectroscopy coupled with gas chromatography. Insight into the evolution of the size of the Pt nanoparticles and their interaction with CeO2 are probed by transmission electron microscopy and X-ray absorption fine structure analysis. Under DRM conditions, the Pt nanoparticles grow in size, however, their re-dispersion on the CeO2 support (via PtOx-support interaction) during air oxidation recovers their activity in the consecutive cycle.
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