| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1283964 | Journal of Power Sources | 2014 | 8 Pages |
•Branched Pt-on-Pd bimetallic nanodendrites supported on rGO is prepared by a one-pot wet-chemical approach.•NP-40 and formic acid are used as a growth-directing agent and a reducing agent, respectively.•The specific activity and mass activity are 3.99 mA cm−2 and 22.72 mA mg−1 at −0.6 V for ORR, respectively.
In this work, a facile one-pot wet-chemical approach is developed for synthesis of three-dimensional platinum-on-palladium (Pt-on-Pd) bimetallic nanodendrites supported on reduced graphene oxide (rGO), where octylphenoxypolye thoxyethanol (NP-40) acts as a growth-directing agent and formic acid serves as a reducing agent under mild conditions. The nanocomposites exhibit enhanced oxygen reduction reaction activity (onset potential of 0.05 V, half-wave potential of −0.15 V, electron transfer number >3.99) and better stability in alkaline media. The diffusion-limited current densities of Pt-on-Pd/rGO at −0.60 V (3.99 mA cm−2 and 22.72 mA mg−1) are much higher than those of PtPd/rGO, Pt/rGO, Pd/rGO, PtPd nanoparticles/rGO, Pt black, Pd black, Pt/C, and Pd/C catalysts. This method is general, facile, and green for preparation of rGO-supporting bimetallic electrocatalysts.
Graphical abstractA facile one-pot wet-chemical approach is developed for synthesis of three-dimensional Pt-on-Pd bimetallic nanodendrites supported on reduced graphene oxide, with the assistance of NP-40 as a growth-directing agent and formic acid as a reducing agent.Figure optionsDownload full-size imageDownload as PowerPoint slide
