In the electrochemical Bunsen reaction, which is the key reaction of the sulfur-iodide cycle, the main overpotential corresponds to the oxidation of SO 2 . The catalysts currently used for the liquid phase electrocatalytic oxidation of SO 2 are mainly based on noble metals, which have excellent corrosion resistance and catalytic activity in an acidic environment. To improve the performance of the commercial Pt catalyst, a Pt catalyst with reduced graphene oxide (RGO) and carbon black as a hybrid support was synthesized by the microwave-assisted polyol reduction process. The large two-dimensional planar structure of RGO was a better anchor for Pt nanoparticles, and a catalyst with fine and uniform distribution of Pt particles was obtained. The carbon black interior prevented the agglomeration of RGO, forming a stereoscopic catalyst structure. The electrochemical test results showed that the RGO/carbon black hybrid support catalyst possessed a higher electrocatalytic activity than the single support catalysts and could be used as an efficient and stable catalyst for the SO 2 electrolyzer.

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Li-air batteries have high theoretical energy density, making them a powerful candidate for flexible electrical products power supply. However, there are many challenges to commercializing Li-air battery in wearable devices, such as the problem of H2O and CO2 gas pollution and electrolyte volatilization caused by open structure. In addition, the construction of high efficiency flexible cathode, effective protection of anode materials, and the suppression of Li dendrites, and reasonable temperature control methods are all problems to be solved. At present, great progress has been made in the research of Li-air batteries, but there is still a lack of decisive breakthrough, which is due to the insufficient basic research. This review summarizes the research progress and challenges of flexible Li-air batteris in recent years for wearable devices, and prospects its future development direction.

As an unusual mechanical response, the ferroelastic phenomenon in two-dimensional materials has been reported both experimentally and theoretically in recent years. Here, we present the theoretical findings of ferroelastic switching...