L. Yang et al.
Fig 9 Thermogravimetric analysis profles during temperature-programmed oxidation of the CoCr2O4 and Co1.5Cr1.5O4 catalysts in synthetic air
after two ethylene steam reforming cycles
10. Wang HF, Kavanagh R, Guo YL, Guo Y, Lu G, Hu P (2012) J
Catal 296:110–119
occurred at lower temperatures. Both the CoCr2O4 and
Co1.5Cr1.5O4 catalyst were active and structurally stable for
ethylene steam reforming at 873 K. The areal reforming rate
over Co1.5Cr1.5O4 was one order-of-magnitude greater than
that over CoCr2O4, which was potentially related to the pres-
ence of Co3+ on the catalyst surface as evident by X-ray
photoelectron spectroscopy. The steady state rate of ethylene
steam reforming over both catalysts after re-oxidation was
comparable to the respective rate from the fresh catalysts,
suggesting an outstanding stability of the Co–Cr–O spinel
structure against reduction to Co metal under steam reform-
ing conditions.
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Acknowledgements This work was supported by Dow. The authors
also acknowledge NSF-MRI Award #1626201 for the acquisition of the
Phi VersaProbe III Scanning XPS at the Nanoscale Materials Charac-
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Compliance with Ethical Standards
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Conflict of interest The authors declare no confict of interest.
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