Title： | Supra-photothermal CO2 methanation over greenhouse-like plasmonic superstructures of ultra-small cobalt nanoparticles |
Authors： | Mujin Cai1, Chaoran Li1,3, Xingda An1,2, Biqing Zhong1, Yuxuan Zhou1, Kun Feng1, Shenghua Wang1, Chengcheng Zhang1, Mengqi Xiao1, Zhiyi Wu1, Jiari He1, Chunpeng Wu1, Jiahui Shen1, Zhijie Zhu1, Kai Feng1,2, Jun Zhong1,2, Le He1,2* |
Institutions： | 1Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China 2Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, Jiangsu, PR China 3Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, 215123, Jiangsu, PR China |
Abstract： | Improving the solar-to-thermal energy conversion efficiency of photothermal nanomaterials at no expense of other physicochemical properties, e.g. the catalytic reactivity of metal nanoparticles, is highly desired for diverse applications but remains a big challenge. Herein, we develop a synergistic strategy for enhanced photothermal conversion by a greenhouse-like plasmonic superstructure of 4-nm cobalt nanoparticles while maintaining their intrinsic catalytic reactivity.The silica shell plays a key role in retaining the plasmonic superstructures for efficient use of the full solar spectrum, and reducing the heat loss of cobalt nanoparticles via the nano-greenhouse effect. The optimized plasmonic superstructure catalyst exhibits supra-photothermal CO2 methanation performance with a record-high rate of 2.3 mol·gCo-1·h-1, close to 100% CH4 selectivity, and desirable catalytic stability.This work reveals the great potential of nanoscale greenhouse effect in enhancing photothermal conversions through the combination with conventional promoting strategies, shedding light on the design of efficient photothermal nanomaterials for demanding applications. |
IF： | 29.4 |
Link： |
Editor: Guo Jia