Beilstein J. Nanotechnol.2018,9, 3013–3024, doi:10.3762/bjnano.9.280
, Austria 10.3762/bjnano.9.280 Abstract The mechanical strain response of nanoporouspalladium (npPd) upon electrochemical hydrogenation using an in situ dilatometric technique is investigated. NpPd with an average ligament diameter of approximately 20 nm is produced via electrochemical dealloying. A
hydrogen-induced phase transition from PdHβ to PdHα is found to enable internal-stress plasticity (or transformation-mismatch plasticity) in nanoporouspalladium, which leads to exceptionally high strains without fracture as a result of external forces. The high surface stress in the nanoporous structure
are elucidated, taking into account characteristics of structure and deformation mechanism.
Keywords: electrochemistry; hydride formation; in situ dilatometry; internal-stress plasticity; nanoporouspalladium; Introduction
Material properties on the nanoscale can differ substantially from their bulk
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Figure 1:
Current I (black) and corresponding strain ε (red) as functions of the applied potential U during a...
Beilstein J. Nanotechnol.2016,7, 1197–1201, doi:10.3762/bjnano.7.110
/bjnano.7.110 Abstract Palladium is a frequently used model system for hydrogen storage. During the past few decades, particular interest was placed on the superior H-absorption properties of nanostructured Pd systems. In the present study nanoporouspalladium (np-Pd) is produced by electrochemical
reversible actuation clearly exceeds the values found in the literature, which is most likely due to the unique structure of np-Pd with an extraordinarily high surface-to-volume ratio.
Keywords: dealloying; dilatometry; hydrogen storage; nanoporouspalladium; resistometry; Findings
The knowledge about the
and catalysis [2].
One attractive method to produce nanostructured metals with macroscopic dimensions is dealloying, an (electro-)chemical process, which removes the less noble component from an alloy by selective etching [3]. Nanoporouspalladium (np-Pd) produced by free corrosion [4] as well as
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Figure 1:
Cyclic voltammetry of np-Pd with a scan rate of 1 mV/s, recorded between potentials UAg/AgCl of −10...