Multifunctional Co0.85Se/graphene hybrid nanosheets: controlled synthesis and enhanced performances for the oxygen reduction reaction and decomposition of hydrazine hydrate

Autor:	Chun-yang Zhang, Lin-Fei Zhang
Rok vydání:	2014
Předmět:	Materials science Chalcogenide Graphene Hydrazine Inorganic chemistry Oxide chemistry.chemical_element Catalysis law.invention chemistry.chemical_compound chemistry Chemical engineering law Monolayer General Materials Science Hydrate Cobalt
Zdroj:	Nanoscale. 6:1782-1789
ISSN:	2040-3372 2040-3364
Popis:	Ultrathin nanosheets possess novel electronic structures and physical properties as compared with their corresponding bulk samples. However, the controlled synthesis of ultrathin monolayer nanosheets still remains a great challenge due to the lack of an intrinsic driving force for anisotropic growth of two-dimensional (2D) structures. Here we demonstrate, for the first time to our knowledge, the in situ synthesis of large-scale ultrathin single-crystalline Co0.85Se nanosheets on graphene oxide (GO) sheets, with a thickness of 3 nm. Owing to the synergetic chemical coupling effects between GO and Co0.85Se, the Co0.85Se/graphene hybrid nanosheets exhibit the highest catalytic performance among the available cobalt chalcogenide-based catalysts for the oxygen reduction reaction (ORR). Moreover, Co0.85Se/graphene hybrid nanosheets can catalyze the decomposition of hydrazine hydrate rapidly, with 97% of hydrazine hydrate being degraded in 12 min and the degradation rate remaining constant over 10 consecutive cycles, thus having great potential as long-term catalysts in wastewater treatment.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::36cd39a700932f03ecbb2f9d6f763565 https://doi.org/10.1039/c3nr05509d Zobrazit plný text záznamu