Anomalous self-optimization of sulfate ions for boosted oxygen evolution reaction

Coordination modulation of iridium single-atom catalyst maximizing water oxidation activity

“…It is noted that the binding energy of Ir 3+ 4 f 7/2 in post-OER Ir 1 /NFS has a negatively shift (~0.1 eV) compared with that in Ir 1 /NFS, indicating the coordination change occur during the OER test. The XPS spectra of S 2 p in post-OER Ir 1 /NFS show that the peak strength ratio of S 2− and SO x 2− displays some predictable changes, implying that the surface sulfur element of NFS is oxidized to some extent 45 – 47 .…”

Synchrotron-radiation spectroscopic identification towards diverse local environments of single-atom catalysts

“…Other issues solved by SRPES such as describing longitudinal distribution of elements are also noteworthy. 134 2.2.1 NAP-XPS. As mentioned above, NAP-XPS builds the relation between local environments of SACs and interfaces surrounded by reactants.…”

Research progress in improving the oxygen evolution reaction by adjusting the 3d electronic structure of transition metal catalysts

“…By introducing anions such as N, P, and S into transition metal catalysts via doping, the adsorption and reaction energy barrier of the reaction intermediates can be optimized by changing the electronic structure of the transition metal, thus effectively improving the OER activity. 59,60 Transition metal catalysts have similar or even better water splitting perform- 47 ance than that of noble metal catalysts, while exhibiting an enormous potential for substituting precious metals. According to different reaction media, precious metal catalysts can be categorized as alkaline system catalysts, 61 acid system catalysts 62,63 and neutral system catalysts.…”