Single atomic Ru in TiO2 boost efficient electrocatalytic water oxidation to hydrogen peroxide

Photochromic single atom Ag/TiO2 catalysts for selective CO2 reduction to CH4

“…In particular, it has been reported that several TiO 2 -based single-atom catalysts enable the production of H 2 O 2 . 60,61 Thus, these results collectively suggest that the oxidation products have negligible influence on Ag/TiO 2 , further ensuring its good stability. Recurrence experiments over Ag/TiO 2 (Fig.…”

Single-Atom Ru Biomimetic Nanozyme for the Electrochemical Sensing of Hydrogen Peroxide

“…These three samples’ high-resolution C 1s spectra (Figure b) exhibit four prominent peaks accordingly signifying CC, C–OH, C–O–C, and HO–CO bonds. Meanwhile, Figure b also shows that the Ru 3d and C 1s signals overlapped, and the fitted Ru 3d signal is divided into the Ru 3d 3/2 and Ru 3d 5/2 peaks for Ru SA/GFs (285.20 and 281.70 eV) and Ru NPs/GFs (285.10 and 281.60 eV), respectively. , In the O 1s spectra (Figure c), aside from the existence of O–H and C–O bonds in three of them, , the emergence of the peak around 530.20 eV corresponding to Ru–O appeared in both Ru SA/GFs and Ru NP/GFs, while the peak located about 533.33 eV attributed to HO–CO observed in GFs diminishes. This alteration suggests that the Ru species anchored on the GFs through chemical bonding. , Furthermore, the signal of Na in GFs is relatively strong, whereas the Na signal decreases after the deposition of Ru (Figure S3), suggesting that the Na element probably indeed exerts a pronounced influence on the formation of the Ru single atom …”

“…To ascertain the atomic dispersion of Ru on the Ru SA/GFs, a more thorough examination of Ru SA/GFs was conducted using spherical aberration-corrected high-angle annular dark-field scanning transmission electron microscopy (AC-HAADF-STEM). As depicted in Figure 1e,f, the conspicuously white dots were 31,32 In the O 1s spectra (Figure 2c), aside from the existence of O−H and C−O bonds in three of them, 33,34 the emergence of the peak around 530.20 eV corresponding to Ru−O appeared in both Ru SA/GFs and Ru NP/GFs, 35 while the peak located about 533.33 eV attributed to HO−C�O observed in GFs diminishes. This alteration suggests that the Ru species anchored on the GFs through chemical bonding.…”

General Design Concept of High‐Performance Single‐Atom‐Site Catalysts for H2O2 Electrosynthesis

“…Sun et al prepared a novel Ru 0.08 Ti 0.92 O 2 catalyst by controllably introducing Ru atoms into TiO 2 (Figure 9a). [286] HAADF-STEM analysis showed the Ru species dispersed as isolated single atoms on the Ru 0.08 Ti 0.92 O 2 surface(Figure 9b). XANES spectra analysis showed that Ru was in the +3-oxidation state and the valence state of Ti was decreased by the introduction of Ru 3+ (Figure 9c,d).…”

“…f) The calculated volcano plot of Ru x Ti 1-x O 2 . g) Adsorption free energy for *OH and *O on Ru 0.10 Ti 0.90 O 2 and Ru 0.08 Ti 0.92 O 2 .Reproduced with permission [286]. Copyright 2023, Elsevier B. V. h) Top and side views of SnO 2 -supported SASCs.…”