Synthesis of Well-Defined Pt-Based Catalysts for Methanol Oxidation Reaction Based on Electron-Hole Separation Effects
Synthesis of Well-Defined Pt-Based Catalysts for Methanol Oxidation Reaction Based on Electron-Hole Separation Effects
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DOI：
10.1021/acssuschemeng.9b00377
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发表时间：
2019-05-06
影响因子：
8.4
通讯作者：
Yin, Geping
中科院分区：
文献类型：
--
作者：
Li, Can;Qu, Yunteng;Yin, Geping
In this work, we develop a green and facile photoreduction strategy to fabricate Pt nanoparticles (NPs), which uniformly distributed on the graphitic carbon encapsulated titanium oxide nanorods (TNR@GC). The TNR@GC exhibits an enhanced electron-hole separation effect due to the existence of trivalent titanium and excellent electric conductivity arising from an ultrathin carbon layer {1.5 nm). The excited electron from TNR can rapidly migrate to the surface of the ultrathin carbon layer and thus reduce the Pt ion, forming well-defined Pt NPs on the carbon layer. The obtained p-Pt/TNR@GC catalyst shows impressive activity and stability for methanol electro-oxidation, exhibiting almost 3-times higher mass activity (1.12 A.mg(-1) Pt) compared with Pt/C. Furthermore, this strategy can be extended to access a series of noble metal function materials, including Au, Ag, and Pd. This work opens a new prospect to prepare functional nanomaterials with environmentally friendly and energy savings.
