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First principles investigations of hydrogen interaction with vacancy-oxygen complexes in vanadium alloys
Zhang, Pengbo; Zou, Tingting; Feng, Shaobo; Zhao, Jijun
2019-10-08
Source PublicationINTERNATIONAL JOURNAL OF HYDROGEN ENERGY
ISSN0360-3199
Volume44Issue:48Pages:26637-26645
AbstractWe reported the hydrogen (H) interacting with the vacancy-oxygen (V-O) pairs complexes and its effect on H accumulation behavior in bcc vanadium in comparison with alone vacancies using first-principles calculations. The H interaction with interstitial O atom is weak repulsion and all interstitial sites near O atom are unstable for H. The alone mono-, di- and trivacancy defects can trap 6, 8-11 and 13 H atoms, while one V-O pair, two V-O pairs, and three V-O pairs complexes trap approximately same about 4-6 H atoms, respectively. The formation of O-vacancy pairs weakens the binding energy of the VmHn clusters, the number of trapped H atoms is drastically reduced to form nearly sized H clusters. We presented the stable configurations of various VmHn and VmOmHn complexes (with m = 1-3 and n = 1-15), the most stable configurations are the V1H2/V2H2/V3H2 clusters in alone vacancies, while there are the V1O1H/V2O2H/V3O3H clusters in the V-O complexes. In presence of alloying Ti near (V-O) pair, one Ti(V-O) pair complex still trap four H atoms, but the H binding strength has some changes. These results demonstrated that the existence of the multi-V-O complexes significantly reduce the growth and swelling of the H clusters. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
KeywordHydrogen Vacancy-oxygen Vanadium alloys First principles calculations
Indexed BySCI
Language英语
WOS IDWOS:000494890900045
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80708
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Zhang, Pengbo,Zou, Tingting,Feng, Shaobo,et al. First principles investigations of hydrogen interaction with vacancy-oxygen complexes in vanadium alloys[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2019,44(48):26637-26645.
APA Zhang, Pengbo,Zou, Tingting,Feng, Shaobo,&Zhao, Jijun.(2019).First principles investigations of hydrogen interaction with vacancy-oxygen complexes in vanadium alloys.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,44(48),26637-26645.
MLA Zhang, Pengbo,et al."First principles investigations of hydrogen interaction with vacancy-oxygen complexes in vanadium alloys".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 44.48(2019):26637-26645.
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