Dry Reforming of Ethane and Butane with CO2 over PtNi/CeO2 Bimetallic Catalysts
- Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Chemistry; Tsinghua Univ., Beijing (China). Dept. of Chemical Engineering
- Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Chemistry
- Tsinghua Univ., Beijing (China). College of Materials Science and Engineering
- Columbia Univ., New York, NY (United States). Dept. of Chemical Engineering
- Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Chemistry; Columbia Univ., New York, NY (United States). Dept. of Chemical Engineering
Dry reforming is a potential process to convert CO2 and light alkanes into syngas (H2 and CO), which can be subsequently transformed to chemicals and fuels. Here in this work, PtNi bimetallic catalysts have been investigated for dry reforming of ethane and butane using both model surfaces and supported powder catalysts. The PtNi bimetallic catalyst shows an improvement in both activity and stability as compared to the corresponding monometallic catalysts. The formation of PtNi alloy and the partial reduction of Ce4+ to Ce3+ under reaction conditions are demonstrated by in-situ Ambient Pressure X-ray Photoemission Spectroscopy (AP-XPS), X-ray Diffraction (XRD) and X-ray Absorption Fine Structure (XAFS) measurements. A Pt-rich bimetallic surface is revealed by Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) following CO adsorption. Combined in-situ experimental results and Density Functional Theory (DFT) calculations suggest that the Pt-rich PtNi bimetallic surface structure would weaken the binding of surface oxygenates/carbon species and reduce the activation energy for C-C bond scission, leading to an enhanced dry reforming activity.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012704; AC02-98CH10886; FG02-05ER15688; AC02-05CH11231
- OSTI ID:
- 1342631
- Report Number(s):
- BNL-113425-2017-JA; R&D Project: CO035; KC0302010; TRN: US1701623
- Journal Information:
- ACS Catalysis, Vol. 6, Issue 11; ISSN 2155-5435
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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