Efficient bifunctional catalysts of CoSe/N-doped carbon nanospheres supported Pt nanoparticles for methanol electrolysis of hydrogen generation

Engineering Selenium Vacancies on CoSe2 Nanoarrays for Alkaline Hydrogen Evolution

“…According to Figure b, the two main peaks were located at 796.9 and 780.46 eV belonging to Co 2p 1/2 and Co 2p 3/2 in CoSe 2 /CC, and which were deconvoluted into Co 0 and Co 2+ species and the satellite. − In comparison with CoSe 2 /CC, it was found that Co 2p 1/2 (797.12 eV) and Co 2p 3/2 (780.64 eV) in CoSe 2 -V Se /CC were positively direction-shifted by ∼0.32 eV and ∼0.18 eV, illustrating a decrease in electron density around Co, which may be caused by the presence of Se vacancies. Furthermore, in the Co 2p of Co­(OH) 2 /CC (Figure S5), only Co 2+ and satellite peaks can be detected. , The peaks at 54.44 and 55.43 eV in CoSe 2 /CC were ascribed to Se 3d 5/2 and Se 3d 3/2 for Se 2– ions. Compared with CoSe 2 /CC, the Se 3d 5/2 (54.59 eV) and Se 3d 3/2 (55.52 eV) in CoSe 2 -V Se /CC (Figure c) were all moved to the positive binding energy direction by ∼0.10 eV.…”

“…Furthermore, in the Co 2p of Co(OH) 2 /CC (Figure S5), only Co 2+ and satellite peaks can be detected. 44,45 The peaks at 54. 44 (Figure 4c) were all moved to the positive binding energy direction by ∼0.10 eV.…”

PtIr Alloy Nanoparticles Anchored on CoSe–NC Nanospheres for Efficient Methanol Oxidation

“…37 The transition metal selenides have recently gained tremendous attention, owing to their good electrical conductivity and water activation ability. 38 Nevertheless, to the best of our knowledge, there are still very few reports on MOR by coupling Pt-based alloys with transition metal selenides.…”

“…For instance, the catalytic performance for MOR was largely improved for the catalysts of PtRu@FeP because of the effective ligand effects and electronic effects between the PtRu shell and FeP core, and the CoSe 2 -induced electron-enriched Pt surface facilitated the removal of CO intermediates and exhibited enhanced catalytic activity and durability for MOR . The transition metal selenides have recently gained tremendous attention, owing to their good electrical conductivity and water activation ability . Nevertheless, to the best of our knowledge, there are still very few reports on MOR by coupling Pt-based alloys with transition metal selenides.…”

ZIF-67-derived CoP/NC effectively supported Pt nanoparticles for methanol oxidation reaction

“…Recently, some catalytic promoters such as transition metal oxides, 18 carbides, 19 and phosphides 20 have been reported for the Pt or Pd based catalyst construction in methanol fuel oxidation; in addition, as expected, these materials not only improve the catalytic activity and stability but also lower the cost of Pt-based catalysts. 21–23 One of the significant principles to choose a catalytic promoter is that it can activate water at a lower potential to generate abundant oxygen-containing species, which can help oxidize the CO intermediate species adsorbed on the neighbouring Pt sites during MOR. 24–26…”