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- Title
NiO@Ni nanoparticles embedded in N-doped carbon for efficient photothermal CO<sub>2</sub> methanation coupled with H<sub>2</sub>O splitting.
- Authors
Zhou, Yun; Zheng, Peng; Wang, Fang; Gu, Fangna; Xu, Wenqing; Lu, Qinyang; Zhu, Tingyu; Zhong, Ziyi; Xu, Guangwen; Su, Fabing
- Abstract
Photothermal carbon dioxide (CO2) methanation has attracted increasing interest in solar fuel synthesis, which employs the advantages of photocatalytic H2O splitting as a hydrogen source and photothermal catalytic CO2 reduction. This work prepared three-dimensional (3D) honeycomb N-doped carbon (NC) loaded with core–shell NiO@Ni nanoparticles generated in situ at 500 °C (NiO@Ni/NC-500). Under the photothermal catalysis (200 °C, 1.5 W/cm2), the CH4 evolution rate of NiO@Ni/NC-500 reached 5.5 mmol/(g·h), which is much higher than that of the photocatalysis (0.8 mmol/(g·h)) and the thermal catalysis (3.7 mmol/(g·h)). It is found that the generated localized surface plasmon resonance enhances the injection of hot electrons from Ni to NiO, while thermal heating accelerates the thermal motion of radicals, thus generating a strong photo-thermal synergistic effect on the reaction. The CO2 reduction to CH4 follows the *OCH pathway. This work demonstrates the synergistic effect of NiO@Ni and NC can enhance the catalytic performance of photothermal CO2 reduction reaction coupled with water splitting reaction.
- Subjects
PHOTOTHERMAL effect; METHANATION; SURFACE plasmon resonance; CARBON dioxide reduction; DOPING agents (Chemistry); HOT carriers
- Publication
Nano Research, 2024, Vol 17, Issue 4, p2283
- ISSN
1998-0124
- Publication type
Article
- DOI
10.1007/s12274-023-6226-5