Fabrication of Yolk-Shell Cu@C Nanocomposites as High-Performance Catalysts in Oxidative Carbonylation of Methanol to Dimethyl Carbonate
Abstract A facile way was developed to fabricate yolk-shell composites with tunable Cu cores encapsulated within hollow carbon spheres (Cu@C) with an average diameter about 210 nm and cavity size about 80 nm. During pyrolysis, the confined nanospace of hollow cavity ensures that the nucleation-and-g...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2017-08-01
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| Series: | Nanoscale Research Letters |
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| Online Access: | http://link.springer.com/article/10.1186/s11671-017-2258-7 |
| _version_ | 1797723535625420800 |
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| author | Juan Wang Panpan Hao Ruina Shi Leilei Yang Shusen Liu Jinxian Zhao Jun Ren Zhong Li |
| author_facet | Juan Wang Panpan Hao Ruina Shi Leilei Yang Shusen Liu Jinxian Zhao Jun Ren Zhong Li |
| author_sort | Juan Wang |
| collection | DOAJ |
| description | Abstract A facile way was developed to fabricate yolk-shell composites with tunable Cu cores encapsulated within hollow carbon spheres (Cu@C) with an average diameter about 210 nm and cavity size about 80 nm. During pyrolysis, the confined nanospace of hollow cavity ensures that the nucleation-and-growth process of Cu nanocrystals take place exclusively inside the cavities. The size of Cu cores can be easily tuned from 30 to 55 nm by varying the copper salt concentration. By deliberately creating shell porosity through KOH chemical activation, at an optimized KOH/HCS mass ratio of 1/4, the catalytic performance for the oxidative carbonylation of methanol to dimethyl carbonate (DMC) of the activated sample is enhanced remarkably with TOF up to 8.6 h−1 at methanol conversion of 17.1%. The activated yolk-shell catalyst shows promising catalytic properties involving the reusability with slight loss of catalytic activity and negligible leaching of activated components even after seven recycles, which is beneficial to the implementation of clean production for the eco-friendly chemical DMC thoroughly. |
| first_indexed | 2024-03-12T10:04:11Z |
| format | Article |
| id | doaj.art-35e3edce5b634b91800cb09e5f1d9308 |
| institution | Directory Open Access Journal |
| issn | 1931-7573 1556-276X |
| language | English |
| last_indexed | 2024-03-12T10:04:11Z |
| publishDate | 2017-08-01 |
| publisher | SpringerOpen |
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| series | Nanoscale Research Letters |
| spelling | doaj.art-35e3edce5b634b91800cb09e5f1d93082023-09-02T11:23:48ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2017-08-011211910.1186/s11671-017-2258-7Fabrication of Yolk-Shell Cu@C Nanocomposites as High-Performance Catalysts in Oxidative Carbonylation of Methanol to Dimethyl CarbonateJuan Wang0Panpan Hao1Ruina Shi2Leilei Yang3Shusen Liu4Jinxian Zhao5Jun Ren6Zhong Li7Key Laboratory of Coal Science and Technology (Taiyuan University of Technology), Ministry of Education and Shanxi ProvinceKey Laboratory of Coal Science and Technology (Taiyuan University of Technology), Ministry of Education and Shanxi ProvinceKey Laboratory of Coal Science and Technology (Taiyuan University of Technology), Ministry of Education and Shanxi ProvinceKey Laboratory of Coal Science and Technology (Taiyuan University of Technology), Ministry of Education and Shanxi ProvinceKey Laboratory of Coal Science and Technology (Taiyuan University of Technology), Ministry of Education and Shanxi ProvinceKey Laboratory of Coal Science and Technology (Taiyuan University of Technology), Ministry of Education and Shanxi ProvinceKey Laboratory of Coal Science and Technology (Taiyuan University of Technology), Ministry of Education and Shanxi ProvinceKey Laboratory of Coal Science and Technology (Taiyuan University of Technology), Ministry of Education and Shanxi ProvinceAbstract A facile way was developed to fabricate yolk-shell composites with tunable Cu cores encapsulated within hollow carbon spheres (Cu@C) with an average diameter about 210 nm and cavity size about 80 nm. During pyrolysis, the confined nanospace of hollow cavity ensures that the nucleation-and-growth process of Cu nanocrystals take place exclusively inside the cavities. The size of Cu cores can be easily tuned from 30 to 55 nm by varying the copper salt concentration. By deliberately creating shell porosity through KOH chemical activation, at an optimized KOH/HCS mass ratio of 1/4, the catalytic performance for the oxidative carbonylation of methanol to dimethyl carbonate (DMC) of the activated sample is enhanced remarkably with TOF up to 8.6 h−1 at methanol conversion of 17.1%. The activated yolk-shell catalyst shows promising catalytic properties involving the reusability with slight loss of catalytic activity and negligible leaching of activated components even after seven recycles, which is beneficial to the implementation of clean production for the eco-friendly chemical DMC thoroughly.http://link.springer.com/article/10.1186/s11671-017-2258-7Confinement effectCu@C nanocompositesYolk-shell structuresOxidative carbonylationDimethyl carbonate |
| spellingShingle | Juan Wang Panpan Hao Ruina Shi Leilei Yang Shusen Liu Jinxian Zhao Jun Ren Zhong Li Fabrication of Yolk-Shell Cu@C Nanocomposites as High-Performance Catalysts in Oxidative Carbonylation of Methanol to Dimethyl Carbonate Nanoscale Research Letters Confinement effect Cu@C nanocomposites Yolk-shell structures Oxidative carbonylation Dimethyl carbonate |
| title | Fabrication of Yolk-Shell Cu@C Nanocomposites as High-Performance Catalysts in Oxidative Carbonylation of Methanol to Dimethyl Carbonate |
| title_full | Fabrication of Yolk-Shell Cu@C Nanocomposites as High-Performance Catalysts in Oxidative Carbonylation of Methanol to Dimethyl Carbonate |
| title_fullStr | Fabrication of Yolk-Shell Cu@C Nanocomposites as High-Performance Catalysts in Oxidative Carbonylation of Methanol to Dimethyl Carbonate |
| title_full_unstemmed | Fabrication of Yolk-Shell Cu@C Nanocomposites as High-Performance Catalysts in Oxidative Carbonylation of Methanol to Dimethyl Carbonate |
| title_short | Fabrication of Yolk-Shell Cu@C Nanocomposites as High-Performance Catalysts in Oxidative Carbonylation of Methanol to Dimethyl Carbonate |
| title_sort | fabrication of yolk shell cu c nanocomposites as high performance catalysts in oxidative carbonylation of methanol to dimethyl carbonate |
| topic | Confinement effect Cu@C nanocomposites Yolk-shell structures Oxidative carbonylation Dimethyl carbonate |
| url | http://link.springer.com/article/10.1186/s11671-017-2258-7 |
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