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Title: Ultrafine molybdenum carbide nanocrystals confined in carbon foams via a colloid-confinement route for efficient hydrogen production
Authors: Kou, Zongkui
Wang, Tingting
Cai, Yi
Guan, Cao
Pu, Zonghua
Zhu, Changrong
Hu, Yating
Elshahawy, Abdelnaby M.
Wang, John
Mu, Shichun
Keywords: Engineering::Materials
Issue Date: 2018
Source: Kou, Z., Wang, T., Cai, Y., Guan, C., Pu, Z., Zhu, C., . . . Mu, S. (2018). Ultrafine molybdenum carbide nanocrystals confined in carbon foams via a colloid-confinement route for efficient hydrogen production. Small Methods, 2(4), 1700396-. doi:10.1002/smtd.201700396
Journal: Small Methods
Abstract: Precise size‐controlled synthesis and multiscale assembly of ultrafine non‐noble‐metal‐based catalysts play a key role in electrochemical energy conversion. Herein, a novel colloid‐confinement strategy for facile synthesis of ultrafine molybdenum carbide nanocrystals with sub‐2 nm average size assembled in carbon foams (uf‐Mo2C/CF) is reported. First, uniformly sized colloidal SiO2 nanospheres are chosen to confine the metal source (NH4)6Mo7O24 molecules and the glucose is as carbon source. Subsequently, by a high temperature reduction–carbonization, Mo2C nanocrystals are achieved and uniformly assembled on the in situ formed amorphous carbon foams. The as formed uf‐Mo2C/CF demonstrates superior hydrogen evolution activity and outstanding stability in the whole pH range. These results indicate the validity of size control and multiscale structural assembly of metal carbide nanocrystals by consideration of the overall mass transport, accessibility, and quantity, as well as the capability of the active sites toward efficient electrocatalytic hydrogen evolution reaction. This strategy can also be expanded to other energy‐related application.
ISSN: 2366-9608
DOI: 10.1002/smtd.201700396
Rights: © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

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