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 N-Doped Food-Grade-Derived 3D Mesoporous Foams as Metal-Free Systems for Catalysis
Tác giả hoặc Nhóm tác giả: Housseinou Ba, Yuefeng Liu, Lai Truong-Phuoc, Cuong Duong-Viet, Jean-Mario Nhut, Dinh Lam Nguyen, Ovidiu Ersen, Giulia Tuci, Giuliano Giambastiani, and Cuong Pham-Huu
Nơi đăng: ACS Catalysis (journal) ..; Số: 6;Từ->đến trang: 1408 - 1419;Năm: 2016
Lĩnh vực: Khoa học công nghệ; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
A challenging task of modern and sustainable catalysis is to re-think key-processes at the heart of renewable energy technology in light of metal-free catalytic architectures designed and fabricated from cheap and easily accessible building blocks. This contribution describes the synthesis of highly N-doped, carbon nanotube (CNT)-netting composites from cheap raw materials. Starting from physical mixtures of CNTs and food-grade components, their thermal treatment generates foamy, N-doped carbon-based architectures. The mesoporous nature of the N-doped carbon phase grown around intertwined carbon-nanotube networks together with the easy control of the final material 3D shape, make the protocol highly versatile for its full exploitation in the production of materials for catalysis. Besides offering unique advantages with respect to the classical N-doped CNT powders, the 3D metal-free composites are highly versatile systems for a number of liquid-phase and gas-phase catalytic processes, under a wide operative temperature range. In this paper we demonstrate their excellent and to some extent unique catalytic performance in two fundamental and catalyst-demanding processes: i) the electrochemical oxygen reduction reaction (ORR) and ii) the direct, steam-free dehydrogenation of ethylbenzene (EB) to styrene (ST).
ABSTRACT
A challenging task of modern and sustainable catalysis is to re-think key-processes at the heart of renewable energy technology in light of metal-free catalytic architectures designed and fabricated from cheap and easily accessible building blocks. This contribution describes the synthesis of highly N-doped, carbon nanotube (CNT)-netting composites from cheap raw materials. Starting from physical mixtures of CNTs and food-grade components, their thermal treatment generates foamy, N-doped carbon-based architectures. The mesoporous nature of the N-doped carbon phase grown around intertwined carbon-nanotube networks together with the easy control of the final material 3D shape, make the protocol highly versatile for its full exploitation in the production of materials for catalysis. Besides offering unique advantages with respect to the classical N-doped CNT powders, the 3D metal-free composites are highly versatile systems for a number of liquid-phase and gas-phase catalytic processes, under a wide operative temperature range. In this paper we demonstrate their excellent and to some extent unique catalytic performance in two fundamental and catalyst-demanding processes: i) the electrochemical oxygen reduction reaction (ORR) and ii) the direct, steam-free dehydrogenation of ethylbenzene (EB) to styrene (ST).
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