Nickel–iron composites are efficient in catalyzing oxygen evolution. Here, we develop a microorganism corrosion approach to construct nickel–iron hydroxides. The anaerobic sulfate-reducing bacteria, using sulfate as the electron acceptor, play a significant role in the formation of iron sulfide decorated nickel–iron hydroxides, which exhibit excellent electrocatalytic performance for oxygen evolution. Experimental and theoretical investigations suggest that the synergistic effect between oxyhydroxides and sulfide species accounts for the high activity. This microorganism corrosion strategy not only provides efficient candidate electrocatalysts but also bridges traditional corrosion engineering and emerging electrochemical energy technologies.

Electrochemical carbon dioxide (CO 2 ) conversion is promising to balance the carbon cycle for human society. However, an efficient electrocatalyst is the key to determine the selective conversion of CO 2 toward valuable products. We report herein an efficient La 2 CuO 4 perovskite catalyst for electrochemical CO 2 reduction. A high Faradaic efficiency of 56.3% with a partial current density of 117 mA cm −2 is achieved for methane production over this perovskite catalyst at −1.4 V (vs RHE). The results demonstrate that the structural evolution of La 2 CuO 4 perovskite takes place simultaneously during the cathodic CO 2 reduction process. Theoretical investigations further unravel that the emerging Cu/La 2 CuO 4 interface accounts for the CO 2 methanation behaviors. This work provides an effective perovskite electrocatalyst for ambient CO 2 methanation and offers a valuable understanding of the structure evolution and surface reconstruction of precatalysts in catalytic reactions for energy-relevant technologies.

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Although the synthesis of single atom catalyst (SAC) has attracted intensive attention for hydrogen evolution reaction (HER), realizing the precise control in the structure of atomic catalysts and the electronic...

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