Mesoporous metallic rhodium nanoparticles
| Autor: | Cuiling Li, Joel Henzie, Yusuke Yamauchi, Ömer Dag, Md. Tofazzal Islam, Toshiaki Takei, Hideki Abe, Tsubasa Imai, Kathleen Wood, Bo Jiang, Md. Shahriar A. Hossain |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Poly(methyl methacrylate)
Reduction (chemistry) Surface area General Physics and Astronomy Nanoparticle 02 engineering and technology 01 natural sciences Synthesis Rrhodium Chemical analysis Multidisciplinary Porous medium 021001 nanoscience & nanotechnology Mesoporous organosilica visual_art visual_art.visual_art_medium Noble metal 0210 nano-technology Materials science Science chemistry.chemical_element engineering.material 010402 general chemistry Article Catalysis General Biochemistry Genetics and Molecular Biology Rhodium Metal Oxidation Thermal stability Reduction Methanol Crystal structure Nitric oxide General Chemistry Concentration (composition) 0104 chemical sciences Oxygen Macrogol Chemical engineering chemistry Concentration (parameters) engineering Catalyst Thermostability Mesoporous material Controlled study |
| Zdroj: | Nature Communications, Vol 8, Iss 1, Pp 1-8 (2017) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Mesoporous noble metals are an emerging class of cutting-edge nanostructured catalysts due to their abundant exposed active sites and highly accessible surfaces. Although various noble metal (e.g. Pt, Pd and Au) structures have been synthesized by hard- and soft-templating methods, mesoporous rhodium (Rh) nanoparticles have never been generated via chemical reduction, in part due to the relatively high surface energy of rhodium (Rh) metal. Here we describe a simple, scalable route to generate mesoporous Rh by chemical reduction on polymeric micelle templates [poly(ethylene oxide)-b-poly(methyl methacrylate) (PEO-b-PMMA)]. The mesoporous Rh nanoparticles exhibited a ∼2.6 times enhancement for the electrocatalytic oxidation of methanol compared to commercially available Rh catalyst. Surprisingly, the high surface area mesoporous structure of the Rh catalyst was thermally stable up to 400 °C. The combination of high surface area and thermal stability also enables superior catalytic activity for the remediation of nitric oxide (NO) in lean-burn exhaust containing high concentrations of O2. Mesoporous noble metal nanostructures offer great promise in catalytic applications. Here, Yamauchi and co-workers synthesize mesoporous rhodium nanoparticles using polymeric micelle templates, and report appreciable activities for methanol oxidation and NO remediation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|