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Catalytic Effect of Nb2O5 in MgH2-Nb2O5 Ball-Milled Composites
Graduate School of Engineering, Hokkaido University, N-13, W-8, Sapporo 060-8628, Japan
Research Department, Creative Research Instituion, Hokkaido University, N-21, W-10, Sapporo 001-0021, Japan
* Author to whom correspondence should be addressed.
Received: 23 July 2012; in revised form: 15 August 2012 / Accepted: 29 August 2012 / Published: 10 September 2012
Abstract: We report a study on the desorption properties, crystallography and chemical state of MgH2 and 1 mol% Nb2O5 ball-milled composites. Desorption temperatures of the composites decreased with increase of ball-milling time. Size of MgH2 crystallites decreased during ball-milling. Reduction of Nb2O5 after ball-milling was confirmed by tracing the chemical state of Nb and was further supported by TEM observation. The reduced phases may act as more effective catalysts improving the desorption properties.
Keywords: MgH2; Nb2O5; catalytic effect; ball-milling
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Ma, T.; Isobe, S.; Wang, Y.; Hashimoto, N.; Ohnuki, S. Catalytic Effect of Nb2O5 in MgH2-Nb2O5 Ball-Milled Composites. Catalysts 2012, 2, 344-351.
Ma T, Isobe S, Wang Y, Hashimoto N, Ohnuki S. Catalytic Effect of Nb2O5 in MgH2-Nb2O5 Ball-Milled Composites. Catalysts. 2012; 2(3):344-351.
Ma, Tao; Isobe, Shigehito; Wang, Yongming; Hashimoto, Naoyuki; Ohnuki, Somei. 2012. "Catalytic Effect of Nb2O5 in MgH2-Nb2O5 Ball-Milled Composites." Catalysts 2, no. 3: 344-351.