The process of traditional synthetic nitrogen-fixing ammonia is high energy consumption and not environmental protection with severe reaction conditions. Thus, it is very important to explore a new approach to...

In recent years, the combustion of fossil fuels leads to the release of a large amount of CO2 gas, which induces the greenhouse effect and the energy crisis. To solve these problems, researchers have turned their focus to a novel Li‐CO2 battery (LCB). LCB has received much attention because of its high theoretical energy density and reversible CO2 reduction/evolution process. So far, the emerging LCB still faces many challenges derived from the slow reaction kinetics of discharge products. In this review, the latest status and progress of LCB, especially the influence of the structure design of cathode catalysts on the battery performance, are systematically elaborated. This review summarizes in detail the existing issues and possible solutions of LCB, which is of high research value for further promoting the development of Li‐Air battery.

Realizing an effective, binder‐free, and super‐wetting electrocatalyst for the hydrogen evolution reaction (HER) at full pH is essential for the creation of clean hydrogen. In this study, the Ru‐loaded NiCo bimetallic hydroxide (Ru@NiCo‐BH) catalyst was prepared by spontaneous redox reaction. The chemical interaction between Ru NPs and NiCo‐BH by the Ru‐O‐M (M=Ni, Co) interface bond, the electron‐rich Ru active site, and the multi‐channel nickel foam carrier make the superhydrophilic and superaerophobic surface advantageous for mass transfer in the HER process. Therefore, Ru@NiCo‐BH has remarkable HER activity, with low overpotential of 29, 68 and 80 mV, and 10 mA cm‐2 current density can be obtained in alkaline, neutral and acidic electrolytes respectively. This work provides a reference for the rational development of universal electrocatalysts for hydrogen evolution in the all pH ranges through simple design strategies.