Ru-doped Ta2O5 supported Pt nanoparticles: an efficient electrocatalyst for methanol oxidation

Catalytic Activity and Electrochemical Stability of Ru1–xMxO2 (M = Zr, Nb, Ta): Computational and Experimental Study of the Oxygen Evolution Reaction

“…The 3d 5/2 and 3d 3/2 peaks are located at 280.82 and 285.10 eV, respectively. The two Ru 3d 5/2 and Ru 3d 3/2 satellite peaks are located at 282.91 and 286.69 eV and are in good agreement with previous reported peak positions. ,, The Nb 3d core-level spectrum consists of the Nb 5+ doublet peaks located at 206.59 eV and 209.31 corresponding to the Nb 3d 5/2 and 3d 3/2 spin–orbit doublet, and their binding energies are in agreement with the previously reported values. − The core-level XPS spectrum of the Ta 4f region shows a doublet that corresponds to Ta 5+ 4f 7/2 and 4f 5/2 located at 25.55 and 27.38 eV, and is within the range of values reported in the literature. , The core-level XPS spectrum of Zr 3d shows a doublet that corresponds to Zr 4+ 3d 5/2 and 3d 3/2 located at 184.34 and 181.92 eV and is within the range of values reported in the literature . XPS spectrum of the O 1s region (Figure S10) of RuO 2 -syn showed asymmetric features that suggest a predominantly anhydrous RuO 2 surface, and similar features consistent with an anhydrous surface were observed for Ru 0.87 Nb 0.13 O 2 , Ru 0.87 Ta 0.13 O 2 , and Ru 0.87 Zr 0.13 O 2 .…”

“…121−123 The core-level XPS spectrum of the Ta 4f region shows a doublet that corresponds to Ta 5+ 4f 7/2 and 4f 5/2 located at 25.55 and 27.38 eV, and is within the range of values reported in the literature. 124,125 The core-level XPS spectrum of Zr 3d shows a doublet that corresponds to Zr 4+ 3d 5/2 and 3d 3/2 located at 184.34 and 181.92 eV and is within the range of values reported in the literature. 126 XPS spectrum of the O 1s region (Figure S10) of RuO 2 -syn showed asymmetric features that suggest a predominantly anhydrous RuO 2 surface, 99 and similar features consistent with an anhydrous surface were observed for Ru 0.87 Nb 0.13 O 2 , Ru 0.87 Ta 0.13 O 2 , and Ru 0.87 Zr 0.13 O 2 .…”