Beilstein J. Nanotechnol.2018,9, 3013–3024, doi:10.3762/bjnano.9.280
are elucidated, taking into account characteristics of structure and deformation mechanism.
Keywords: electrochemistry; hydride formation; in situ dilatometry; internal-stress plasticity; nanoporous palladium; Introduction
Material properties on the nanoscale can differ substantially from their bulk
is elaborated below. The most important factor related to the irreversible contraction upon desorption after hydrogenation at low potentials are the forces which the sample is subjected to during dilatometry. On the one hand the sample experiences a weak, but steady compressive stress by means of the
reached. The annealing steps were conducted in a vacuum furnace at 700 °C and 10−5 mbar for 1 h. The resulting foil was cut into squares of 5 × 5 mm2.
Dealloying
The setup used for in situ dilatometry during electrochemical characterisation was similar to that described in an earlier work of our group [17
PDF
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
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; nanoporous palladium; resistometry; Findings
The knowledge about the
platelet. The mid-positioned wire served as working-electrode contact connected to a PGZ-100 potentiostat (Radiometer Analytical), the other wires were connected to a Keithley 2400 Source Meter for four-point resistometry.
For dilatometry a square shaped sample platelet (ca. 5 × 5 mm2) was placed under the
different slope, attributed to hydrogen adsorption followed by hydrogen absorption at higher imposed charges. For dilatometry (Figure 2b) these results agree fairly well with the behavior of consolidated palladium nanoparticles, which was discussed within an electrocapillary coupling model by Viswanath and
PDF
Figure 1:
Cyclic voltammetry of np-Pd with a scan rate of 1 mV/s, recorded between potentials UAg/AgCl of −10...