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Nanoporous carbon: liquid-free synthesis and geometry-dependent catalytic performance

Xu, Ruoyu, Kang, Liqun, Knossalla, Johannes, Mielby, Jerrik, Wang, Qiming, Wang, Bolun, Feng, Junrun, He, Guanjie, Qin, Yudao, Xie, Jijia, Swertz, Ann-Christin, He, Qian, Kegnæs, Søren, Brett, Dan J. L., Schüth, Ferdi and Wang, Feng Ryan 2019. Nanoporous carbon: liquid-free synthesis and geometry-dependent catalytic performance. ACS Nano 13 (2) , pp. 2463-2472. 10.1021/acsnano.8b09399

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Nanostructured carbons with different pore geometries are prepared with a liquid-free nanocasting method. The method uses gases instead of liquid to disperse carbon precursors, leach templates, and remove impurities, minimizing synthetic procedures and the use of chemicals. The method is universal and demonstrated by the synthesis of 12 different porous carbons with various template sources. The effects of pore geometries in catalysis can be isolated and investigated. Two of the resulted materials with different pore geometries are studied as supports for Ru clusters in the hydrogenolysis of 5-hydroxymethylfurfural (HMF) and electrochemical hydrogen evolution (HER). The porous carbon-supported Ru catalysts outperform commercial ones in both reactions. It was found that Ru on bottleneck pore carbon shows a highest yield in hydrogenolysis of HMF to 2,5-dimethylfuran (DMF) due to a better confinement effect. A wide temperature operation window from 110 to 140 °C, with over 75% yield and 98% selectivity of DMF, has been achieved. Tubular pores enable fast charge transfer in electrochemical HER, requiring only 16 mV overpotential to reach current density of 10 mA·cm–2.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Publisher: American Chemical Society
ISSN: 1936-0851
Date of First Compliant Deposit: 11 February 2019
Date of Acceptance: 16 January 2019
Last Modified: 23 Jan 2020 03:30

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