banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Adsorption of hydrogen on the surface and sub-surface of Cu(111)
Rent this article for
View: Figures


Image of FIG. 1.
FIG. 1.

Time-evolved transmission spectra illustrating the change in IR background during exposure of atomic hydrogen to Cu(111) at 180 K. Inset: plot of background transmission at 2000 cm (red squares) and integrated absorbance of the 1150 cm-band (blue circles) vs. total hydrogen coverage on Cu(111) at 180 K.

Image of FIG. 2.
FIG. 2.

Time-evolved IR spectra obtained during the adsorption of atomic hydrogen on Cu(111) at 160 K. Spectra were collected at 40 s time intervals, and the initial period without the peak at 1150 cm has not been included. (Absorbance spectra are baseline corrected.) Inset: extended spectral range from 1500 to 950 cm.

Image of FIG. 3.
FIG. 3.

Time-evolved IR spectra obtained for the 160 K-surface in Figure 2 during heating from 140 K to 200 K. (Heating rate = 0.1 K/s; 4 K/spectrum.) Inset: integrated IR absorbance as a function of temperature for the 160 K-surface (red squares) and the 180 K-surface (blue circles). (Integration range from 1120 to 1160 cm.)

Image of FIG. 4.
FIG. 4.

Thermal desorption spectrum (mass 4) after the adsorption of a saturation coverage of deuterium on Cu(111) at 160 K. (Heating rate = 3 K/s). The corresponding IR spectrum is shown in the inset.

Image of FIG. 5.
FIG. 5.

(a) CO adsorption on a H-Cu(111) surface during cooling to 105 K (see text for details). (b) CO adsorption after TP-IRRAS to 220 K and during re-cooling to 95 K. (c) CO adsorption after heating to 310 K and re-cooling to 104 K. (a)-(c) P = 1 × 10 Torr CO.

Image of FIG. 6.
FIG. 6.

IR spectra obtained after adsorption of H at 180 K and re-cooling of the surface from 180 K to 110 K. Inset: integrated absorbance as a function of exposure (left) and recooling (right).

Image of FIG. 7.
FIG. 7.

Potential energy diagram for the adsorption and absorption of H at high coverage (3 hydrogen atoms per unit cell). The top view of the optimized structures for the 3SH, TS1, 2SH +1SSH-1st, TS2 systems, and the side view of the 2SH+1SSH-2nd system are also shown. SH-surface H, SSH-1st – H between the surface layer and the first sub-surface layer, SSH-2nd – H between the first and the second sub-surface layer (SSH-2nd), TS-transition state. Big brown: Cu; small white: H.

Image of FIG. 8.
FIG. 8.

Experimental E calculation between SH and SSH-1st sites, from the SH coverage measurements in the inset of Figure 3 .


Article metrics loading...


Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Adsorption of hydrogen on the surface and sub-surface of Cu(111)