In Situ Stress and Nanogravimetric Measurements During Hydrogen Adsorption/Absorption on Pd Overlayers Deposited onto (111)-Textured Au
Gery R. Stafford, Ugo Bertocci
The stress induced by electrochemical hydrogen adsorption and absorption in very thin palladium layers electrodeposited onto (111)-textured gold has been examined in 0.1M H(subscript 2)SO(subscript 4) by the cantilever curvature method, as well by comparing resonant frequency changes on AT-and BT-cut quartz crystals. The results are consistent with a maximum atomic H/Pd loading of 0.63 and give a compressive surface stress of -0.45 N m(superscript -1) per monolayer of Pd, corresponding to a film stress of -2.0 GPa. Although H adsorption causes a volume expansion in unstrained Pd, since the thin deposited Pd layers are under tensile stress due to coherency with the Au substrate, much of the compressive effect observed goes forward relieving this tensile stress rather than generating large compressive residual stress in the Pd film.
and Bertocci, U.
In Situ Stress and Nanogravimetric Measurements During Hydrogen Adsorption/Absorption on Pd Overlayers Deposited onto (111)-Textured Au, Journal of Physical Chemistry C, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=902065
(Accessed August 16, 2022)