Umeshbabu Ediga, Ranga Rao G
Department of Chemistry, Indian Institute of Technology, Madras, India), Fax: (+91) 44-2257-4202.
Chemphyschem. 2016 Nov 4;17(21):3524-3534. doi: 10.1002/cphc.201600667. Epub 2016 Sep 15.
A Pt-V O /rGO ternary hybrid electrocatalyst was designed by using active vanadium(V) oxide (V O ) nanorods and reduced graphene oxide (rGO) components. The V O nanorods were synthesized by a simple polyol-assisted solvothermal method and were incorporated uniformly onto rGO sheets by intermittent microwave heating. Subsequently, Pt nanoparticles (2-3 nm in size) were deposited over the V O /rGO composite by the conventional polyol reflux method. The electrocatalytic performance of the Pt-V O /rGO ternary hybrid and bare Pt/rGO catalysts towards the oxidation of simple alcohols was evaluated in acidic media. The ternary hybrid catalyst exhibited higher electrocatalytic activity than bare Pt/rGO and also showed good stability. The higher electrocatalytic activity of the Pt-V O /rGO ternary hybrid was attributed to a synergistic effect among the Pt, V O , and rGO components. In addition, oxygen-containing species, such as OH groups, were generated on V O at lower potentials. These groups were able to scavenge intermediate species such as CO on the Pt surfaces and helped to regenerate the active sites on the Pt surface more effectively for the routine alcohol oxidation reaction.
通过使用活性氧化钒（V₂O₅）纳米棒和还原氧化石墨烯（rGO）组分设计了一种Pt-V₂O₅/rGO三元混合电催化剂。V₂O₅纳米棒通过简单的多元醇辅助溶剂热法合成，并通过间歇微波加热均匀地掺入到rGO片材上。随后，通过传统的多元醇回流法在V₂O₅/rGO复合材料上沉积尺寸为2-3 nm的Pt纳米颗粒。在酸性介质中评估了Pt-V₂O₅/rGO三元混合催化剂和裸Pt/rGO催化剂对简单醇氧化的电催化性能。三元混合催化剂表现出比裸Pt/rGO更高的电催化活性，并且还显示出良好的稳定性。Pt-V₂O₅/rGO三元混合催化剂的较高电催化活性归因于Pt、V₂O₅和rGO组分之间的协同效应。此外，在较低电位下V₂O₅上会生成含氧化合物，如OH基团。这些基团能够清除Pt表面上的中间物种，如CO，并有助于更有效地再生Pt表面上的活性位点以进行常规的醇氧化反应。
