Grain boundary density and electronic dual modulation of intermetallic Co2B by Fe doping toward efficient catalyst for oxygen evolution reaction

Electronic structure engineering for electrochemical water oxidation

“…Doping metal atoms into alloys to further enhance their OER performance has also been documented and is a domain that should be pursued by prospective researchers. Qiao et al 181 recently reported Fe-doped intermetallic Co 2 B, which demonstrated OER activity surpassing that of IrO 2 .…”

Cobalt and Aluminum Co-Optimized 1T Phase MoS2 with Rich Edges for Robust Hydrogen Evolution Activity

“…The appearance of the Co 3+ peak originates from the inevitable oxidation during the ball milling process. 46 The high-resolution Al 2p spectra of CA-1T-MoS 2 present a single peak (Figure 2f), demonstrating the presence of Al. 47 In conclusion, Co-1T-MoS 2 (Figures 3d and S6), indicating that the charge transfer kinetics in the HER process of CA-1T-MoS 2 are the most favorable.…”

“…In addition, the high-resolution Co 2p spectra show the peaks at 783.19 and 779.79 eV corresponding to Co 2+ 2p 3/2 and Co 3+ 2p 3/2 , respectively. The appearance of the Co 3+ peak originates from the inevitable oxidation during the ball milling process . The high-resolution Al 2p spectra of CA-1T-MoS 2 present a single peak (Figure f), demonstrating the presence of Al .…”

Ultra-low Ru doped MOF-derived hollow nanorods for efficient oxygen evolution reaction

“…For CoFe-MOF-2, the characteristic peaks at 781.7 eV and 797.28 eV were assigned to Co 2p 3/2 and Co 2p 1/2 respectively, and the Co 2p region in Ru@CoFe/D-MOF-2 is in high conformity with the former, except that a new signal of Co 0 was detected, which confirmed the reduction process. 41 It is notable that the binding energy of Co 2+ in Ru@CoFe/D-MOF-2 was negatively shifted to 0.6 eV, implying a lower charge state of Co sites. 25,26 For Fe 2p regions, a doublet at 711.9 eV and 725.5 eV corresponded well to Fe 2p 3/2 and Fe 2p 1/2 in CoFe-MOF-2, and low content of metallic Fe was also detected in Ru@CoFe/D-MOF-2 (Fig.…”