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Materials Research Society Symposium Proceedings 1311, GG10.9 (2010) submitted 12/14/2010 Alloy Oxide Electrocatalysts for Regenerative Hydrogen-Halogen Fuel Cell
 

Summary: Materials Research Society Symposium Proceedings 1311, GG10.9 (2010) submitted 12/14/2010
Alloy Oxide Electrocatalysts for Regenerative Hydrogen-Halogen Fuel Cell
Sujit K Mondala)
, Jason Rugolo, Michael J. Aziz1
Harvard School of Engineering and Applied Sciences, Cambridge, MA, 02138, U.S.A.
1
Corresponding author. maziz at harvard dot edu
ABSTRACT
Stable, catalytically active, and inexpensive halogen electrodes are essential for the success of
the regenerative hydrogen-halogen fuel cell as a competitive means of large-scale electricity
storage. We report the synthesis and electrochemical testing of two novel electrode materials --
ruthenium-cobalt and ruthenium-manganese alloy oxides. These alloys were fabricated by wet
chemical synthesis methods as a coating on a titanium metal substrate and tested for chloride and
bromide oxidation and for chlorine and bromine reduction. These alloy oxides exhibit high
catalytic potency and good electrical conductivity good stability, while having a significantly
reduced precious metal composition compared to commercial chloride oxidation electrodes made
of the oxide of a ruthenium-titanium alloy. We tested alloys with Ru content as low as 1% that
maintained good electrochemical activity. Stability tests indicate immeasurably small mass loss.
INTRODUCTION
There are many means of storing electrical energy, but only a few are feasible for the power

  

Source: Aziz, Michael J.- School of Engineering and Applied Sciences, Harvard University

 

Collections: Physics; Materials Science