Electrochemical hydrogenation of nanocrystalline face-centered cubic Co powder

S. R. Chung; K. W. Wang; M. H. Teng; T. P. Perng

doi:10.1016/j.ijhydene.2008.11.073

Electrochemical hydrogenation of nanocrystalline face-centered cubic Co powder

S. R. Chung, K. W. Wang, M. H. Teng, T. P. Perng

Graduate Institute of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	1383-1388
Number of pages	6
Journal	International Journal of Hydrogen Energy
Volume	34
Issue number	3
DOIs	https://doi.org/10.1016/j.ijhydene.2008.11.073
State	Published - Feb 2009

Keywords

Co
Discharge capacity
Electrochemical hydrogenation
FCC
HCP

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10.1016/j.ijhydene.2008.11.073

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title = "Electrochemical hydrogenation of nanocrystalline face-centered cubic Co powder",

abstract = "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 CoHx/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.",

keywords = "Co, Discharge capacity, Electrochemical hydrogenation, FCC, HCP",

author = "Chung, {S. R.} and Wang, {K. W.} and Teng, {M. H.} and Perng, {T. P.}",

note = "Funding Information: This work was supported by the Ministry of Education of Taiwan under contract A-91-E-FA04-1-4 and the Ministry of Economic Affairs under contract 93-EC-17-A-08-S1-0003.",

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T1 - Electrochemical hydrogenation of nanocrystalline face-centered cubic Co powder

AU - Chung, S. R.

AU - Wang, K. W.

AU - Teng, M. H.

AU - Perng, T. P.

N1 - Funding Information: This work was supported by the Ministry of Education of Taiwan under contract A-91-E-FA04-1-4 and the Ministry of Economic Affairs under contract 93-EC-17-A-08-S1-0003.

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Y1 - 2009/2

N2 - 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 CoHx/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.

AB - 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 CoHx/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.

KW - Co

KW - Discharge capacity

KW - Electrochemical hydrogenation

KW - FCC

KW - HCP

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U2 - 10.1016/j.ijhydene.2008.11.073

DO - 10.1016/j.ijhydene.2008.11.073

M3 - 期刊論文

AN - SCOPUS:58649117561

SN - 0360-3199

VL - 34

SP - 1383

EP - 1388

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 3

ER -

Electrochemical hydrogenation of nanocrystalline face-centered cubic Co powder

Abstract

Keywords

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