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Role of La2O3 in Pd-Supported Catalysts for Methanol Decomposition

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Abstract

Systems of Pd supported on various La2O3-modified γ-Al2O3 and CeO2–Al2O3 catalysts were tested for catalytic methanol decomposition and characterized by means of XRD, BET, TPR, H2-chemisorption and CO–FTIR. The addition of lanthanum significantly improved the selectivity of CO and H2 for all the catalysts but showed a different influence on the catalytic activity in two systems. Methanol conversion decreased on La2O3-modified Pd/γ-Al2O3 catalysts, in line with the reduction of Pd dispersion, while the addition of La2O3 improved the dispersion of Pd and reinforced Pd–CeO2 interaction for La2O3-modified Pd/CeO2–Al2O3 catalysts, which resulted in a high production rate of CO and H2. Thus, a synergistic effect between CeO2 and La2O3 was observed on γ-Al2O3-supported Pd catalyst for methanol decomposition.

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Authors and Affiliations

  1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Science, P.O. Box 165, Taiyuan, 030001, People's Republic of China

    Cheng Yang, Jie Ren & Yuhan Sun

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  1. Cheng Yang
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  2. Jie Ren
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Yang, C., Ren, J. & Sun, Y. Role of La2O3 in Pd-Supported Catalysts for Methanol Decomposition. Catalysis Letters 84, 123–129 (2002). https://doi.org/10.1023/A:1021045122126

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