NOVELTY - The method comprises synthesizing carbon nanotubes (CNTs) grafted with poly(citric acid) encapsulating platinum group metal nanoparticles, and electrospray depositing the carbon nanotubes grafted with poly(citric acid) encapsulating platinum group metal nanoparticles on an electrode of a fuel cell. The step of synthesizing the nanotubes grafted with poly(citric acid) encapsulating platinum group metal nanoparticles comprises oxidizing carbon nanotubes, and mixing (106) the oxidized carbon nanotubes and monohydrated citric acid to synthesize carbon nanotubes grafted with poly(citric acid).    USE - The method is useful for forming a direct methanol fuel cell anode, where the direct methanol fuel cell is useful as power sources for portable electronic devices.    ADVANTAGE - The method is capable of easily, efficiently and economically forming the direct methanol fuel cell anode at low temperature with reduced size and less energy consumption and without any degradation.    DETAILED DESCRIPTION - The method comprises synthesizing carbon nanotubes (CNTs) grafted with poly(citric acid) encapsulating platinum group metal nanoparticles, and electrospray depositing the carbon nanotubes grafted with poly(citric acid) encapsulating platinum group metal nanoparticles on an electrode of a fuel cell. The step of synthesizing the carbon nanotubes grafted with poly(citric acid) encapsulating platinum group metal nanoparticles comprises: oxidizing carbon nanotubes; mixing (106) the oxidized carbon nanotubes and monohydrated citric acid to synthesize carbon nanotubes grafted with poly(citric acid); mixing (110) the carbon nanotubes grafted with poly(citric acid) with sources of platinum group metal ions to synthesize the carbon nanotubes grafted with poly (citric acid) encapsulating platinum group metal nanoparticles; synthesizing multi-walled carbon nanotubes grafted with poly(citric acid) encapsulating platinum group metal nanoparticles; synthesizing carbon nanotubes grafted with poly(citric acid) encapsulating platinum and palladium nanoparticles. The step of oxidizing the carbon nanotubes comprises mixing (102) the carbon nanotubes, nitric acid, and sulfuric acid to oxidize the carbon nanotubes in a first mixture. A ratio of the nitric acid to the sulfuric acid in the first mixture is 1-3. The step of mixing the carbon nanotubes grafted with poly(citric acid) with the sources of platinum group metal ions to synthesize the carbon nanotubes grafted with poly(citric acid) encapsulating platinum group metal nanoparticles comprises mixing the carbon nanotubes grafted with poly(citric acid) with chloroplatinic acid, platinum oxide, platinum chloride, and platinum acetylacetonate and with palladium chloride, palladium nitrate, palladium sulfate, and palladium acetylacetonate to synthesize carbon nanotubes grafted with poly(citric acid) encapsulating platinum and palladium nanoparticles. The method further comprises oxidizing carbon nanotubes, and mixing the oxidized carbon nanotubes and monohydrated citric acid to synthesize carbon nanotubes grafted with poly(citric acid). An amount of chloroplatinic acid mixed with the carbon nanotubes grafted with poly(citric acid) is twice that of the palladium chloride. A ratio of platinum nanoparticles to palladium nanoparticles in the carbon nanotubes grafted with poly(citric acid) encapsulating platinum and palladium nanoparticles is 2:1. The step of electrospray depositing the carbon nanotubes grafted with poly(citric acid) encapsulating platinum group metal nanoparticles on the electrode of the fuel cell comprises electrospray depositing the carbon nanotubes grafted with poly(citric acid) encapsulating platinum group metal nanoparticles on an electrode of a direct methanol fuel cell in an interlaced manner at a flow rate of greater than or equal to 600 mu l/minute and an electric field potential of greater than or equal to 18 kV and on an anode of the fuel cell. An INDEPENDENT CLAIM is included for a fuel cell electrode.    DESCRIPTION OF DRAWING(S) - The figure shows a flowchart of a method for synthesizing polymerized CNTs encapsulating platinum group metal nanoparticles and coating an electrode of a fuel cell with the polymerized CNTs encapsulating platinum group metal nanoparticles.    Mixing CNTs, nitric acid and sulfuric acid to oxidize the CNTs in a first mixture (102)    Extracting the oxidized CNTs from the first mixture (104)    Mixing the oxidized CNTs and monohydrated citric acid to synthesize CNTs grafted with poly(citric acid) in a second mixture (106)    Extracting the CNTs grafted with poly(citric acid) from the second mixture (108)    Mixing the CNTs grafted with poly(citric acid) and sources of platinum group metal ions to synthesize CNTs grafted with poly(citric acid) encapsulating platinum group metal nanoparticles in a third mixture. (110)