FeSe2/CoSe nanosheets for efficient overall water splitting under low cell voltages

Perovskite CoSn(OH)6 nanocubes with tuned d-band states towards enhanced oxygen evolution reactions

“…4c), which is attributed to the Raman band corresponding to the Fe–O vibration from the produced Fe–O(OH). 50,51 The XRD spectra before and after the OER were also examined, which are also consistent with the in situ Raman results (Fig. S9†).…”

A crystalline/amorphous FeCo alloy/FeCoNi-Pi bifunctional electrocatalyst for efficient overall water splitting

“…Typically, the OER is a four-electron oxidation process. 51 It can be observed that FCN-8P with a remarkable OER performance also possesses a Tafel slope of 44.5 mV dec −1 , being minor than 47.9 mV dec −1 of FCN and 49.7 mV dec −1 of FC. Notably, the Tafel slope of FCN-8P is less than 60 mV dec −1 , which implies that the transition from M–O* to M–OOH* is the rate-determining step according to the reported literature.…”

Selenium-transition metal supported on a mixture of reduced graphene oxide and silica template for water splitting

“…The overpotential value at 10 mA cm −2 for different iron composite electrocatalyst e.g. FeSe 2 supported on CoSe using hydrothermal and selenization process is 183 mV, 29 Fe–Co–S/CC-37.5 and Fe–Co–S/CC-150 using hydrothermal process is 320 mV, 89 Fe–Mo supported on Te is 300 mV, 103 Fe(Se 0.5 S 0.5 ) 2 using hydrothermal process is 247 mV, 104 FeSe 2 using hydrothermal process is 330 mV, 105 FeP and FeCoNiP prepared by chemical reduction and phosphorization process are 325 and 200 mV, respectively, 106 Fe 0.5 Co 0.5 Se 2 supported on carbon fiber cloth prepared by solvo thermal and selenization process is 290 mV, 107 NiFeSe x supported on carbon fiber cloth prepared by electrodeposition followed by solvo thermal process is 310 mV. 108 Additional LSV and Tafel slope comparison of recently published non-noble metal-based for OER catalysts are shown in Table 1.…”

“…Huixuan Zhang et al 24 prepared FeSe 2 /CoFe 2 O 4 by two steps hydrothermal method, it gained a Tafel slope of 88.76 mV dec −1 and that of FeSe 2 is 107.9 mV dec −1 for HER in an acidic medium. In addition, X. Xing et al 29 found an easy way to synthesize bimetallic transition metal selenides electrocatalysts for water-splitting reactions, they prepared FeSe 2 /CoSe nanosheet by hydrothermal and selenization processes and tested it in an alkaline medium for water electrolysis. The results reviled that, at 10 mA cm −2 , low overpotential of 73 mV for HER and 183 mV for OER.…”