Hierarchical Cu nanoparticle-aggregated cages with high catalytic activity for reduction of 4-nitrophenol and carbon dioxide
- Authors
- Jiang, Jianwei; Gunasekar, Gunniya Hariyanandam; Park, Sanghyuk; Kim, Sang-Ho; Yoon, Sungho; Piao, Longhai
- Issue Date
- Apr-2018
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Hierarchical Cu nanoparticle-aggregated cages; Porous Cu catalyst; 4-Nitrophenol reduction; CO2 hydrogenation; Heterogeneous catalyst
- Citation
- MATERIALS RESEARCH BULLETIN, v.100, pp 184 - 190
- Pages
- 7
- Journal Title
- MATERIALS RESEARCH BULLETIN
- Volume
- 100
- Start Page
- 184
- End Page
- 190
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/45291
- DOI
- 10.1016/j.materresbull.2017.12.018
- ISSN
- 0025-5408
1873-4227
- Abstract
- Hierarchical similar to 10 nm Cu nanoparticle (NP)-aggregated sub -micro cage catalysts (diameter: similar to 800 rim) with a hollow interior and porous shell were prepared from SiO2 encapsulated Cu2O nanoparticle aggregates (NPAs) using a facile and scalable method. The Cu cages were analyzed by field emission-scanning electron microscopy (FE-SEM), energy-dispersed X-ray (EDX), transmission electron microscopy (TEM), high-resolution TEM, selected area electron diffraction (SAED), X-ray diffraction (XRD) and Brunauer-Emmett-Teller (BET). Owing to the small primary Cu NPs and characteristic porous shell and hollow interior, the Cu cages showed an extraordinarily high catalytic activity in the reduction of 4-nitrophenol by NaBH4 in aqueous solution. The activity factor (K = 520 s(-1) g(-1)) is approximately 2.8 times greater than the previous highest K value of unsupported Cu catalysts. In addition, the excellent catalytic activity of the Cu cages in hydrogenation of CO2 to formate, with a TON value of 58 at 200 degrees C, was comparable to that of various noble metal-supported heterogeneous catalysts and surpassed the vast majority of homogeneous first-row transition metal catalysts.
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Collections - College of Natural Sciences > Department of Chemistry > 1. Journal Articles
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