1988
DOI: 10.1016/0013-4686(88)80195-6
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Characterization of the β-Ni(OH)2/β-NiOOH system by positron lifetime spectroscopy

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Cited by 12 publications
(9 citation statements)
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“…In our earlier work, we confirmed the outlined mechanism of the oxidation-reduction process on electrochemically treated samples with the help of positron lifetime spectro-scopy and observed the formation of a positron trap in the heterogeneous range [4]. In this work, we give the results of measurements performed on chemically oxidised samples and compare these results with those of electrochemical oxidation.…”
Section: Introductionsupporting
confidence: 67%
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“…In our earlier work, we confirmed the outlined mechanism of the oxidation-reduction process on electrochemically treated samples with the help of positron lifetime spectro-scopy and observed the formation of a positron trap in the heterogeneous range [4]. In this work, we give the results of measurements performed on chemically oxidised samples and compare these results with those of electrochemical oxidation.…”
Section: Introductionsupporting
confidence: 67%
“…Of the lifetimes, z3 is the only identifiable one. On the basis of our earlier measurements on fine-grained and rough-grained pure Ni(OH), [4], we related it to the annihilation of oxidised positronium atoms trapped at the surface of Ni(OH)*. Therefore, the decrease in Z3 indicates the decreasing Ni(OH)* content of the surfaces of grains.…”
Section: Resultsmentioning
confidence: 98%
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“…According to Barnard's work, it was generally assumed that the reversible transformation of β-II into β-III occurs in three definite steps: an initial β-II solid solution region up to NEE = 0.25, a biphasic domain up to NEE = 0.75, and a final β-III solid solution region up to NEE = 1. Such assumptions were later confirmed by other techniques, such as thermal analysis and positron lifetime spectroscopy . However, later on, by studying chemically prepared samples with controlled oxidation degree, Tessier et al pointed out that at least the β-II solid solution region could be much smaller than expected.…”
Section: Resultsmentioning
confidence: 94%