Abstract
Developing an efficient non-noble catalyst for CO oxidation with high catalytic activity remains a challenge for practical applications. In this work, CuO nanorods decorated reduced graphene oxide (RGO) nanocatalysts were prepared via a facile one-step hydrothermal method. The structure and morphology of the as-prepared samples were characterized by XRD, Raman spectroscopy, SEM, TEM, and X-ray photoelectron spectroscopy (XPS). The analysis results show that CuO nanorods were successfully deposited on the surface of RGO sheets with the length of 250–500 nm. The catalytic properties of the as-prepared catalysts for CO oxidation were evaluated by using a microreactor-gas chromatograph (GC) system. The as-prepared RGO–CuO nanocatalysts exhibited high activity for CO oxidation, and the 10 wt % reduced graphene oxide content catalyst can achieve CO total oxidation at 165 °C.
Highlights
Carbon monoxide (CO) is an odorless and poisonous gas, and a small amount is fatal
The 10%-reduced graphene oxide (RGO)–CuO catalyst was selected to investigate the catalytic stability for CO of the as‐prepared RGO–CuO hybrid nanocatalysts
The results demonstrated that the catalytic activity of the as-prepared RGO–CuO composite prepared RGO–CuO composite catalysts was steady
Summary
Carbon monoxide (CO) is an odorless and poisonous gas, and a small amount is fatal. Catalytic oxidation is a good removal method, even for low concentrations of CO. Much attention was given to seeking non-noble metal catalysts such as Cu [7,9,16], Mn [17], and Co [18,19,20] to reduce the price and realize high-efficiency CO conversion. Pd [3], Pt [22], TiO22 [23], CeO22 [24], and MnO22 [25] materials have been recently reported to possess high activities in many catalytic reactions. In the theoretical research field, some studies have that graphene-based catalysts may possess high activity for CO oxidation [26,27].
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