Atomic interactions of two-dimensional PtS2 quantum dots/TiC heterostructures for hydrogen evolution reaction

Layered 2D PtX2 (X = S, Se, Te) for the electrocatalytic HER in comparison with Mo/WX2 and Pt/C: are we missing the bigger picture?

“…Classic examples of this kind are PtPdRuTe reported by Liu and co-workers 78 and the Pt/PtTe 2 /NiCoTe 2 heterostructure reported by Yi and co-workers. 79 Similarly, PtS 2 /TiC reported by Jeong and co-workers 80 and PtSe 2 /Pt reported by Wang and co-workers 81 have performed as have done by Pt/C. Otherwise, none of the reported PtX 2 were able to surpass the activity exerted by Pt or Pt/C in the HER.…”

Self-Healing Graphene-Templated Platinum–Nickel Oxide Heterostructures for Overall Water Splitting

“…3 The Pt 4f peak was deconvoluted into signals of Pt 2+ and Pt 4+ at 72.6 and 73.6 eV, respectively, due to the precursor (Pt-aniline) complex. 20 In contrast, no peak of metallic Ni was observed in the Ni 2p spectrum. This phenomenon is theoretically consistent with the dominance of Pt over Ni in the reduction reaction.…”

“…Figure c and d shows the XPS profiles of Pt and Ni, where the main Pt 4f and Ni 2p peaks were located at 71.7 and 855.6 eV, corresponding to metallic Pt and NiO, respectively . The Pt 4f peak was deconvoluted into signals of Pt 2+ and Pt 4+ at 72.6 and 73.6 eV, respectively, due to the precursor (Pt-aniline) complex . In contrast, no peak of metallic Ni was observed in the Ni 2p spectrum.…”

PtS quantum dots/Nb2O5 nanosheets with accelerated charge transfer for boosting photocatalytic H2 production

“…2b, in the XPS diagram of Pt 4f, the characteristic peaks at 74.7 eV and 71.2 eV are ascribed to Pt 4f 5/2 and Pt 4f 7/2 related to Pt 2+ in PtS QDs, 35 while the two characteristic peaks at 76.7 eV and 73.3 eV belong to Pt 4f 5/2 and Pt 4f 7/2 of the Pt 4+ species. 36 For the XPS diagram of the S 2p region (Fig. 2c), two characteristic peaks at 163.1 eV and 161.9 eV are ascribed to S 2p 1/2 and S 2p 3/2 of S 2− in PtS QDs.…”