▎ 摘　　要

NOVELTY - Polymer electrolyte membrane fuel cell comprises: a positive electrode; a negative electrode; a polyelectrolyte membrane having a hydrophobic exterior surface subjected to UV/ozone exposure; and a solution comprising reduced graphene oxide and/or graphene oxide functionalized with nanoparticles of gold, platinum, palladium, silver, copper and/or their alloys. The UV/ozone exposure changes the hydrophobic, exterior surface to a hydrophilic exterior surface. The polyelectrolyte membrane is disposed between the positive electrode and the negative electrode. USE - Used as a polymer electrolyte membrane fuel cell. ADVANTAGE - The polymer electrolyte membrane fuel cell exhibits increased efficiency by at least 50% compared to fuel cells not coated with reduced graphene oxide and/or graphene oxide functionalized with nanoparticles (claimed), where platinum nanoparticles increase the efficiency of the fuel cell by at least 90% and a combination of platinum and gold nanoparticles increases the efficiency of the fuel cell by 100%, i.e. the efficiency is the same as pure hydrogen feed gas, while reducing both nanoparticle aggregation and the amount of precious metal needed, and increasing carbon monoxide tolerance and power output, thus exhibiting improved fuel cell power output while reducing or even eliminating carbon monoxide poisoning at room temperature, in a simple and cost-effective manner. The metal functionalized reduced graphene oxide coated polymer layers replace aluminum electrodes, which easily oxidize, with graphene. The hydrophilic polymer surfaces have low contact angle, good adhesiveness, good wettability and high solid surface free energy. DETAILED DESCRIPTION - Polymer electrolyte membrane fuel cell comprises: a positive electrode; a negative electrode; a polyelectrolyte membrane having a hydrophobic exterior surface subjected to UV/ozone exposure; and a solution comprising reduced graphene oxide and/or graphene oxide functionalized with nanoparticles of gold, platinum, palladium, silver, copper and/or their alloys. The UV/ozone exposure changes the hydrophobic, exterior surface to a hydrophilic exterior surface. The polyelectrolyte membrane is disposed between the positive electrode and the negative electrode. The solution forms a coating on the hydrophilic exterior surface of the polymer electrolyte membrane and the positive and negative electrodes. An INDEPENDENT CLAIM is also included for making a polymer electrolyte fuel cell, comprising forming a polymer electrolyte membrane having a hydrophobic exterior surface, subjecting the hydrophobic exterior surface of the polymer electrolyte membrane to UV/ozone exposure, disposing the polymer electrolyte membrane with the hydrophilic exterior surface between the positive electrode and the negative electrode, preparing the solution comprising reduced graphene oxide and/or graphene oxide, functionalizing the solution with nanoparticles of gold, platinum, palladium, silver, ferric oxide, copper and/or their alloys, and contacting the hydrophilic exterior surface of the polymer electrolyte membrane and the positive and negative electrodes with the functionalized solution.