4500 J. Phys. Chem. B, Vol. 110, No. 9, 2006
Additions and Corrections
ADDITIONS AND CORRECTIONS 2005, Volume 109B Kentaro Teramura, Kazuhiko Maeda, Takafumi Saito, Tsuyoshi Takata, Nobuo Saito, Yasunobu Inoue, and Kazunari Domen*: Characterization of Ruthenium Oxide Nanocluster as a Cocatalyst with (Gal-xZnx)(Nl-xOx) for Photocatalytic Overall Water Splitting In this article (J. Phys. Chem. B 2005, 109, 21915-21921), the Fourier transforms of k3-weighted Ru-K edge extended X-ray absorption fine structure (EXAFS) spectra were reported incorrectly. All Ru-K edge EXAFS spectra published in the article were measured on November 5, 2004, at the SPring-8 BL01B1 beamline, and due to instrumental difficulties, the obtained spectra had strong wavy undulations. The spectra were repaired using a smoothing program supplied by SPring-8 BL01B1 technical staff. However, incorrect spectra were generated due to a mistake in the smoothing range employed. This erratum presents correction to Figures 7 and 9 in the original article. Figure 9. Fourier transforms of k3-weighted Ru-K edge EXAFS spectra for 5.0 wt % RuO2-loaded (Gal-xZnx)(Nl-xOx) (b) as prepared, and (c-h) after calcination at (c) 323, (d) 373, (e) 423, (f) 523, (g) 623, and (h) 723 K. Spectra for (a) Ru3(CO)12 and (i) RuO2 are provided as reference compounds.
Figure 7. Fourier transforms of k3-weighted Ru-K edge EXAFS spectra for (Gal-xZnx)(Nl-xOx) loaded with (a) 0.5, (b) 1.0, (c) 3.5, (d) 5.0, (e) 7.5, and (f) 10.0 wt % RuO2 and calcined at 623 K, and (g) spectrum for RuO2 as a reference compound.
Figure 7 shows the Fourier transform (FT) of the k3-weighted Ru-K edge EXAFS spectra for (Gal-xZnx)(Nl-xOx) loaded with 0.5-10.0 wt % RuO2, and Figure 9 shows the corresponding transforms for 5.0 wt % RuO2-loaded (Gal-xZnx)(Nl-xOx) calcined at various temperatures, with the results for Ru3(CO)12 and RuO2 shown for reference. While many of the spectra are
not changed substantially by the correction, the results for (Gal-xZnx)(Nl-xOx) loaded with 7.5 and 10.0 wt % (Figures 7e and f), 5.0 wt % RuO2-loaded (Gal-xZnx)(Nl-xOx) calcined at 723 K (Figure 9h), and the RuO2 reference differ appreciably from the results published in the original article. The FT of EXAFS spectrum for 7.5 wt % RuO2-loaded (Gal-xZnx)(Nl-xOx) calcined at 623 K (Figure 7e), in which RuO2 nanoclusters had been observed by scanning electron microscopy (SEM), is similar to that of 5.0 wt % RuO2-loaded (Gal-xZnx)(Nl-xOx) calcined at 623 K (Figure 7d). It is likely that the first and second shell peaks in the FT of EXAFS spectra for bulk RuO2 (10.0 wt % RuO2/(Gal-xZnx)(Nl-xOx); Figure 7f) and the RuO2 reference (Figure 7g) shifted to slightly higher position compared to the RuO2 nanoclusters (0.5-7.5 wt % RuO2/(Gal-xZnx)(Nl-xOx) calcined at 623 K; Figures 7a-e). The continuous first and second shell peak shifts in the FT of EXAFS spectra for RuO2/ (Gal-xZnx)(Nl-xOx) calcined between 523 and 723 K can be confirmed based on the growth of the nanoclusters in Figure 9. These differentiable peak shifts between RuO2 nanoclusters and bulk RuO2 are very small, although RuO2 nanoclusters generated on (Gal-xZnx)(Nl-xOx) had been identified by SEM. It is difficult to identify subtle differences between the peak positions of the RuO2 nanocluster and bulk RuO2 at the time of writing, and the details of these differences should be discussed on the basis
Additions and Corrections of more XAFS spectral data. Accordingly, the discussion related to the peak shift between the RuO2 nanocluster and bulk RuO2 in the FT of EXAFS spectra for RuO2/(Gal-xZnx)(Nl-xOx) in the published article is withdrawn. This does not affect the conclusion of the article that highly dispersed RuO2 nanoclusters
J. Phys. Chem. B, Vol. 110, No. 9, 2006 4501 on (Gal-xZnx)(Nl-xOx) strongly promote photocatalytic overall water splitting. 10.1021/jp068001m Published on Web 02/04/2006
