Hydrogen fueling system

A hydrogen fueling system for generating hydrogen on demand, the hydrogen fueling system comprising:

• an electrolyzer configured to generate hydrogen, the electrolyzer comprising:
• a proton-exchange membrane having first and second opposed major surfaces;
• a cathode on the first major surface of the proton-exchange membrane;
• and
• an anode on the second major surface of the proton-exchange membrane;
• and
• a vehicle tank filling system connected to the electrolyzer and configured to at least partially fill a tank of a vehicle with hydrogen generated by the electrolyzer,
• wherein the anode comprises (a) an ionomer binder;
• and (b) a plurality of acicular particles dispersed throughout the ionomer binder, the acicular particles comprising an elongated core with a layer of catalytic material on at least one portion of a surface of the elongated core, the catalytic material comprising iridium, the elongated core comprising at least one of a polynuclear aromatic hydrocarbon, heterocyclic compounds, or combinations thereof.