Tuning the performance of Pt-Ni alloy/reduced graphene oxide catalysts for 4-nitrophenol reduction
MetadataShow full item record
© 2016 The Royal Society of Chemistry. An environmentally benign and economic reaction system with an effective catalyst for 4-nitrophenol reduction is highly desirable. Here, we synthesized reduced graphene oxide (RGO) supported Pt-Ni alloy catalysts with different atomic ratios of Pt and Ni, investigated their morphology, size, dispersity, structure and elemental valence, and studied their catalytic activity in order to tune their performance for 4-nitrophenol reduction. It is worth pointing out that the RGO support can efficiently avoid the aggregation of Pt-Ni alloy nanoparticles, and the most dispersed and smallest Pt-Ni particles on RGO can be obtained when the atomic ratio of Pt to Ni is 1 : 9. The Pt-Ni/RGO (1 : 9) nanocatalyst also shows a higher catalytic activity toward the conversion of 4-NP to 4-AP with a catalytic rate constant of 0.3700 min-1than Pt-Ni/RGO (1 : 3) and Pt-Ni/RGO (1 : 25), and much higher than that of Pt/RGO, Ni/RGO and bare Pt-Ni owing to the well-defined composition, small particle size (10 nm), good dispersion, synergistic effect between Pt and Ni, and electron transfer between RGO and Pt-Ni alloy nanoparticles. In addition, the catalyst possesses good stability and recyclability for the catalytic reduction reaction. The Pt-Ni/RGO nanocatalyst, with well-defined composition, small particle size, uniform dispersity, high catalytic rate, and recyclability, should be an ideal catalyst for specific applications in liquid phase reactions.
Showing items related by title, author, creator and subject.
In situ fabrication of (Sr,La)FeO<inf>4</inf> with CoFe alloy nanoparticles as an independent catalyst layer for direct methane-based solid oxide fuel cells with a nickel cermet anodeChang, H.; Chen, H.; Shao, Zongping; Shi, J.; Bai, J.; Li, S. (2016)© 2016 The Royal Society of Chemistry.An independent catalyst layer is applied to develop a highly effective way to reduce coking when operating in methane based fuels, in which the catalyst layer is separated from a Ni ...
Steam reforming of phenol-ethanol to produce hydrogen over bimetallic NiCu catalysts supported on sepioliteLiang, T.; Wang, Y.; Chen, M.; Yang, Z.; Liu, Shaomin; Zhou, Z.; Li, X. (2017)© 2017 Hydrogen Energy Publications LLC. A series of NiCu bimetallic catalysts supported on sepiolite (Ni x Cu y /SEP) were prepared by co-precipitation method. The all as-prepared catalysts were characterized by using ...
Selectivity enhancement for higher alcohol product in Fischer-Tropsch synthesis over nickel-substituted La<inf>0.9</inf>Sr<inf>0.1</inf>CoO<inf>3</inf> perovskite catalystsAo, M.; Pham, Gia; Sage, V.; Pareek, Vishnu (2017)© 2017 Elsevier Ltd The performance of La 0.9 Sr 0.1 Co 1-x Ni x O 3 perovskite catalysts with different Ni substitution levels was evaluated in the Fischer-Tropsch (F-T) synthesis for higher alcohol production. It was ...