Air-mediated construction of O, N-rich carbon: An efficient support of palladium nanoparticles toward catalytic formic acid dehydrogenation and 4-nitrophenol reduction. (30th October 2020)

• Record Type: Journal Article
• Authors: Cheng, Wei; Zhao, Xue; Luo, Wenxiu; Wang, Yi; Fan, Guangyin
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 53(2020)
• Page Start: 29034
• Page End: 29045
• Publication Date: 2020-10-30
• Subjects: Palladium -- Formic acid -- 4-Nitrophenol -- Dehydrogenation -- Ethylenediamine tetra-acetic acid tetra-sodium salt; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.07.199
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Oxygen and nitrogen-rich functional groups which are generally present in carbon materials may significantly affect their catalytic properties. The development of O, N-rich functional carbon materials with a simplified and low-budget strategy is of great importance for practical application. Herein, we describe a facile and straightforward method to prepare high contents of nitrogen and oxygen-rich carbon derived from ethylenediamine tetra-acetic acid tetra-sodium salt (Na4 EDTA) by one-step carbonization in muffle furnace without inert gas protection. Compared with the carbon (EC-N700) synthesized in an argon atmosphere, the carbon (EC-A700) synthesized in an air-rich condition was more conducive to the formation of edge defects and topological defects and possessed higher contents of N and O elements. Consequently, the O, N-rich carbon EC-A700 was used as an efficient support of palladium nanoparticles toward catalytic formic acid dehydrogenation and nitroarene reduction. The catalyst Pd/EC-A700 achieved outstanding activity for formic acid dehydrogenation with a turnover frequency (TOF) up to 7039 h −1 at 60 °C. At the same time, the obtained catalyst Pd/EC-A700 also demonstrated exceptional catalytic performance in the 4-nitrophenol (4-NP) reduction with corresponding rate constant k of 0.72 min −1 under mild reaction conditions, which proved that the prepared catalyst Pd/EC-A700 has potentially applied in catalytic hydrogenation. This low-cost and simple approach breaks the tradition in mind that pyrolysis should always operate under inert conditions and provides a straightforward route to construct O, N-rich carbon as appealing materials for a wide variety of applications. Graphical abstract: Image 1 Highlights: Break the tradition in mind and synthesize the O, N-rich carbon matrix. One-step carbonation in aerobic conditions without any complicated treatments. Abundant nitrogen/oxygen species benefited small size and dispersion of Pd NPs. Good performance for formic acid dehydrogenation and 4-nitrophenol reduction.