Triphasic Ni2P−Fe2P−CoP heterostructure interfaces for efficient overall water splitting powered by solar energy

Boron-doped CoP/nitrogen-doped carbon drives enhanced alkaline hydrogen evolution

“…They both exhibited a pair of spin–orbit bimodal signals, with Co 2p 3/2 and Co 2p 1/2 peaks of CoP/NC observed at 778.48 and 793.35 eV and ascribed to Co-P bonds in CoP/NC, with peaks observed at 781.84 and 797.63 eV and ascribed to Co-O bonds that may have resulted from surface oxidation, and with peaks observed at 785.93 and 802.62 eV and considered to be shake-up satellite peaks (indicated as “Sat”). 31,32 Compared with those of CoP/NC, the binding energy levels of the Co 2p 3/2 and Co 2p 1/2 peaks of 4.3% B-CoP/NC were negatively shifted by about 0.01 eV, attributed to the introduction of B atoms into CoP. In general, the ability of low-electronegativity B to absorb electrons is lower than that of P, which results in fewer electrons nearby the B atom and an increase in the electron density nearby the Co atom for the Co-B bond, which in turn would be expected to result in a relatively lower valence state of Co in 4.3% B-CoP/NC.…”

An in situ formed ZIF-67 derived NiFeCo-P nano-array for accelerating the electrocatalytic oxygen evolution reaction

“…3c), especially for operation at large current density (≥100 mA cm 2 ). 18,43,46–57 In addition, Fig. 3d shows that the Tafel slope of NiFeCo-P/NF (25.24 mV dec −1 ) is smaller than that of NiFeCo-LDH/NF (44.24 mV dec −1 ), NiFe-P/NF (34.37 mV dec −1 ) and NiFe-LDH/NF (52.83 mV dec −1 ).…”

Ruthenium single atoms implanted on NiS2-FeS2 nanosheet heterostructures for efficacious water electrolysis

“…Especially, the additional two new phases of NiOOH (011) and FeOOH (110) corresponding to d -spacings of 0.239 nm and 0.260 nm, respectively, have been observed in the post-OER test. 55 Additionally, the electronic image obtained from FE-SEM (Fig. S14d, ESI†) and the SEM-EDS element mappings (Fig.…”