Abstract: A metal alloy catalyst for the oxygen reduction reaction in fuel cells is disclosed. The catalyst contains the metals Pd, M1 and M2. M1 and M2 are different metals selected from Co, Fe, Au, Cr and W, excluding the combination PdCoAu.

Abstract: A metal alloy catalyst for the oxygen reduction reaction in fuel cells is disclosed. The catalyst contains the metals Pd, M1 and M2. M1 and M2 are different metals selected from Co, Fe, Au, Cr and W, excluding the combination PdCoAu.

Abstract: An electrochemical cell for testing the electrochemical behavior of a plurality of materials comprises: a first electrode; a counter-electrode bearing an electrochromic material having a visual or measurable property which changes in a manner proportional to the total charge passed through it; and an electrolyte between and in electrical contact with the first electrode and the counter-electrode; wherein one of the first electrode and the electrolyte comprises a plurality of regions, each region comprising a sample of material to be tested, the regions being, in the case of the first electrode, electrically connected to a common terminal. Such a cell can be used for a “combinatorial chemistry” approach to testing the properties of possible cell components.

Abstract: An alloy catalyst for oxygen reduction reaction in a polymer electrolyte membrane fuel cell, comprising at least Pd, Co, and Au, wherein each content of Pd, Co, and Au satisfies 20 atomic %?Pd<70 atomic %, 30 atomic %?Co<70 atomic %, and 0 atomic %<Au?30 atomic %.

Abstract: Titanium dioxide or a lithium titanate, especially mesoporous titanium dioxide or lithium titanate, can function as a negative electrode in an electrochemical cell in which the electrolyte is an aqueous solution containing lithium and hydroxide ions.