NOVELTY - A fuel cell stack comprises: (a) fuel cell(s) comprising an anode with a fuel inlet port for hydrogen containing fuel and a cathode with an oxidant inlet port; and (b) chamber(s) for a solution comprising a solvent and chemical hydride(s), having an inlet and an outlet for the solution, and a catalyst within the chamber(s) for catalyzing a reaction to generate hydrogen.    USE - Fuel cell system for internal hydrogen generation.    ADVANTAGE - The fuel cell system is safe and compact, thus eliminating the need for bulky storage and/or separate reformer subsystems. A separate cooling loop may no longer be required. The chemical hydride solution stream absorbs and removes heat from the stack. The hydrogen gas may be humidified by the water vapor from the chemical hydride solution, thus a separate humidification system for the anode may no longer be required. The system is simplified, resulting in improved system efficiency and enhanced power density. Since chemical hydride reactions can take place at subzero temperatures, the fuel cell system can start at lower temperatures than conventional fuel cells.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) an energy generating system comprising:    (a) the fuel cell stack;    (b) a storage mechanism for storing the solution;    (c) a circulation loop, at least connected to the storage mechanism, each chamber inlet port and each chamber outlet port, for circulating the solution from the storage mechanism through the fuel cell stack; and    (d) a supplying path, connected to the hydrogen inlet port of each fuel cell anode and each chamber outlet port, for supplying hydrogen generated inside the chamber back to the fuel cell; and    (2) a method for generating and supplying hydrogen to the fuel cell, comprising:    (i) providing a supply of solution comprising solvent and chemical anhydride(s);    (ii) supplying the solution to a catalyst in the fuel cell to catalyze the reaction of the solvent and the chemical anhydride to generate hydrogen;    (iii) removing the solution comprising hydrogen, by-products and unreacted solution from the fuel cell;    (iv) separating the hydrogen from the solution; and    (v) delivering the generated hydrogen to the fuel cell.    The fuel cell stack generates electricity and water from hydrogen and an oxidant.    DESCRIPTION OF DRAWING(S) - The figure is an exploded perspective view of a fuel cell unit located within a fuel cell stack.    Anode (120)    Proton exchange membrane (125)    Cathode (130)