Janus Mn single atoms for triggering efficient photothermal catalytic CO2 methanation through spin polarization effect

Photothermal catalysis, using sunlight as single energy source, is an ideal pattern for CO2 reduction. Herein, Mn single atoms (SAs) are constructed on the surface of NNSO, which induces spin polarization effect, thus promoting directional transfer of photothermal electrons, and improving electron density of Mn sites and adsorption ability of CO2. Meanwhile, Mn SAs act as new active sites enhancing the adsorption of intermediate *CO, thus suppressing CO production, lowering energy barriers of hydrogenation and changing the reaction path. Additionally, the hydrogen overflow energy barriers decrease under the effect of spin polarization, promoting the rapid transfer of active H from Ni atoms to Mn SAs. Resultly, the rate of CO2 methanation is 195.7 mmol g−1 h−1 with near-unity selectivity, and the catalytic activity of 1.0%Mn/NNSO increases by approximately 140 times compared with NNSO. This is the first study that spin polarization effect is utilized to achieve efficient photothermal CO2..., , , # Janus Mn single atoms for triggering efficient photothermal catalytic CO2 methanation through spin polarization effect

Dataset DOI: [10.5061/dryad.6wwpzgncd](https://doi.org/10.5061/dryad.6wwpzgncd)

## Description of the data and file structure

This is the raw data of adz7504, including all the figures and related data in the main text, as well as the data in Supplementary Materials. The raw data mainly includes catalytic performance related data and test characterization, etc.

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