Highly Thermally Stable Au–Rh NRs for Plasmon-Enhanced Photothermal Catalytic CO 2 Hydrogenation to C 2

作者：Xiangxiang Zhang, Wen Xie, Zeyan Wang, Yuanyuan Liu, Peng Wang, Hefeng Cheng, Ying Dai, Baibiao Huang, Zhaoke Zheng · 发表于：Energy & Fuels · 年份：2025 · DOI：10.1021/acs.energyfuels.5c02820 · 被引用次数：5 · 研究领域：Advanced Photocatalysis Techniques、Catalytic Processes in Materials Science、Copper-based nanomaterials and applications

Photothermal catalytic CO 2 hydrogenation represents a promising strategy for the sustainable production of value-added C 2 chemicals under mild conditions. However, the development of efficient catalysts with both high selectivity and robust thermal stability remains a significant challenge. Herein, we report the rational design of a thermally stable plasmonic Au–Rh NR catalyst supported on γ-Al 2 O 3 (Au–Rh NRs@Al 2 O 3 ) for efficient photothermal CO 2 hydrogenation to C 2 products. The catalyst combines the strong light-to-thermal conversion capability of Au NRs with the catalytic activity and thermal stability of Rh nanoparticles, forming a core–satellite architecture. Under full-spectrum illumination, Au–Rh NRs@Al 2 O 3 achieves a remarkable C 2 formation rate of 2.36 mmol g Au&Rh –1 min –1 and a C 2 selectivity of ∼64%, outperforming conventional thermal catalysis by 172-fold. Moreover, thermal annealing experiments confirm that Rh coating dramatically improves the thermal stability of Au NRs, enabling structural integrity and sustained LSPR features at temperatures up to 500 °C. This work provides a robust strategy for engineering highly active and stable plasmonic nanocatalysts for solar-driven CO 2 upgrading.