Electrochemical hydrogenation of nanocrystalline face-centered cubic Co powder

Nanocrystalline face-centered cubic (FCC) Co powder encapsulated within graphite layers was fabricated by an arc discharge method. Its electrochemical hydrogenation properties were investigated and compared with those of the hexagonal close packed (HCP) structure. Both exhibited a similar stabilized...

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Veröffentlicht in:	International journal of hydrogen energy 2009-02, Vol.34 (3), p.1383-1388
Hauptverfasser:	Chung, S.-R., Wang, K.-W., Teng, M.-H., Perng, T.-P.
Format:	Artikel
Sprache:	eng
Schlagworte:	Alternative fuels. Production and utilization Applied sciences Arc discharges Close packed lattices Discharge Discharge capacity Electrochemical hydrogenation Encapsulation Energy Exact sciences and technology Face centered cubic lattice FCC Fuels Graphite HCP Hydrogen Hydrogenation Nanocrystals
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Beschreibung
Zusammenfassung:	Nanocrystalline face-centered cubic (FCC) Co powder encapsulated within graphite layers was fabricated by an arc discharge method. Its electrochemical hydrogenation properties were investigated and compared with those of the hexagonal close packed (HCP) structure. Both exhibited a similar stabilized discharge capacity of approximately 350 mAh/g that can be attributed to the CoH x /Co reaction. During the cyclic charge/discharge, transition between HCP-Co and FCC-Co took place. Graphite encapsulation was beneficial to the cycle stability of the FCC powder.
ISSN:	0360-3199 1879-3487
DOI:	10.1016/j.ijhydene.2008.11.073