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The K–Co–Mo/C catalysts with different molar ratios of Co/Mo and reduction temperatures were prepared by a sol–gel method and characterized by the means of XRD, H 2 -TPR, XPS and in situ DRIFTS. The addition of moderate amount of cobalt can promote the reduction of Mo species to Mo δ+ species. With increasing the Co content, the CO adsorption strength on Mo δ+ species increased...
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