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Non‐noble metal catalysts now play a key role in promoting efficiently and economically catalytic reduction of CO2 into clean energy, which is an important strategy to ameliorate global warming and resource shortage issues. Here, a non‐noble bimetallic catalyst of CoFe/Fe3O4 nanoparticles is successfully designed with a core–shell structure that is well dispersed on the defect‐rich carbon substrate for the hydrogenation of CO2 under mild conditions. The catalysts exhibit a high CO2 conversion activity with the rate of 30% and CO selectivity of 99%, and extremely robust stability without performance decay over 90 h in the reverse water gas shift reaction process. Notably, it is found that the reversible exsolution/dissolution of cobalt in the Fe3O4 shell will lead to a dynamic and reversible deactivation/regeneration of the catalysts, accompanying by shell thickness breathing during the repeated cycles, via atomic structure study of the catalysts at different reaction stages. Combined with density functional theory calculations, the catalytic activity reversible regeneration mechanism is proposed. This work reveals the structure–property relationship for rational structure design of the advanced non‐noble metallic catalyst materials with much improved performance. [ABSTRACT FROM AUTHOR]

Antimony-based electrodes have earned a place among anodes for sodium-ion batteries (SIBs) on account of their high specific capacity and appropriate reaction potential. However, significant volume changes during charge/discharge cycles directly lead to poor cycling ability, prohibiting their further practical application. Doping is recognized as a valid approach to tuning the electrochemical properties of electrodes for better electrochemical performances. In this work, Se-doped Sb solid solution (Sb1-xSex) nanoparticles are reported as a variety of anode materials for SIBs via a straightforward solvothermal method. The nanoparticles are uniformly distributed with a small size of about 20 nm. The diffusion properties of Na+ are studied by the galvanostatic intermittent titration technique (GITT), and the coefficient is acquired by calculation to be 1.8 × 10–12 cm2 s–1. The electrochemical measurement results show that the nanoparticle electrode yields reversible capacities of 514, 500, 464, and 313 mAh g–1 at 0.5, 1, 2, and 5 A g–1, respectively. An initial charging specific capacity of 556.3 mAh g–1 could be stable for 100 cycles at 100 mA g–1, retaining up to 96.8% of battery capacity. It is believed that a solution is provided based on our findings to polish the electrochemical characteristics applied in SIBs by means of doping. [ABSTRACT FROM AUTHOR]

Supported atomically dispersed metals are proving to be efficacious photocatalysts for CO2 reduction to solar fuels. While being atom efficient, they suffer from being noble, rare, and costly (Pt, Pd, Au, Ag, Rh) and lacking in long‐term stability. Herein, all of these problems are solved with the discovery that atomically dispersed Cu supported on ultrathin TiO2 nanosheets can photocatalytically reduce an aqueous solution of CO2 to CO. The atomically dispersed Cu can be recycled in a straightforward procedure when they become oxidatively deactivated. This advance bodes well for the development of a solar fuels technology founded on abundant, low‐cost, nontoxic, atomically dispersed metal photocatalysts. [ABSTRACT FROM AUTHOR]

Non-noble metal catalysts now play a key role in promoting efficiently and economically catalytic reduction of CO 2 into clean energy, which is an important strategy to ameliorate global warming and resource shortage issues. Here, a non-noble bimetallic catalyst of CoFe/Fe 3 O 4 nanoparticles is successfully designed with a core-shell structure that is well dispersed on the defect-rich carbon substrate for the hydrogenation of CO 2 under mild conditions. The catalysts exhibit a high CO 2 conversion activity with the rate of 30% and CO selectivity of 99%, and extremely robust stability without performance decay over 90 h in the reverse water gas shift reaction process. Notably, it is found that the reversible exsolution/dissolution of cobalt in the Fe 3 O 4 shell will lead to a dynamic and reversible deactivation/regeneration of the catalysts, accompanying by shell thickness breathing during the repeated cycles, via atomic structure study of the catalysts at different reaction stages. Combined with density functional theory calculations, the catalytic activity reversible regeneration mechanism is proposed. This work reveals the structure-property relationship for rational structure design of the advanced non-noble metallic catalyst materials with much improved performance., (© 2022 The Authors. Advanced Science published by Wiley-VCH GmbH.)