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In the past few decades, MoS2-based electrodes for lithium–oxygen (Li–O2) batteries have raised great interest and achieved significant progress as a result of their tunable physical structures and electronic properties. This review aims to provide a comprehensive summary on the recent development of MoS2 for Li–O2 batteries, under the view of structural design and electronic structure modulation. Moreover, the correlation between the structural feature and the catalytic performance is emphatically discussed. Finally, the remaining challenges on the future development of advanced MoS2-based electrodes for Li–O2 batteries are also highlighted. This review could provide valuable insights for the rational design of MoS2-based electrodes for Li–O2 batteries and beyond.

Tungsten oxide with strong acid resistance and weak O-binding ability could potentially achieve a tradeoff on the O-binding property by constructing W and Ir dual sites for acidic oxygen evolution...

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The high unoccupied d band energy of Ni 3 N basically results in weak orbital coupling with water molecule, consequently leading to slow water dissociation kinetics. Herein, we demonstrate Cr doping can downshift the unoccupied d orbitals and strengthen the interfacial orbital coupling to boost the water dissociation kinetics. The prepared Cr-Ni 3 N/Ni displays an impressive overpotential of 37 mV at 10 mA•cm geo -2 , close to the benchmark Pt/C in 1.0 M KOH solution. Refined structural analysis reveals the Cr dopant exists as the Cr-N 6 states and the average d band energy of Ni 3 N is also lowered. Density functional theory calculation further confirms the downshifted d band energy can strengthen the orbital coupling between the unpaired electrons in O 2p and the unoccupied state of Ni 3d, which thus facilitates the water adsorption and dissociation. The work provides a new concept to achieve on-demand functions for hydrogen evolution catalysis and beyond, by regulating the interfacial orbital coupling.