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Acrylamide was grafted onto corn starch with ceric(IV) ions as an initiator. Starch-graft-polyacrylamide was modified with amino acids through a reaction with the sodium salts of glycine, ␤-alanine, and phenylalanine. The catalytic activities of the iron(III) complexes of the amino acid modified grafted materials were investigated for the decomposition of hydrogen peroxide (H 2 O 2 ). These new polymeric supports were found to be active in the catalytic decomposition of H 2 O 2 . The extent of decomposition varied with the composition of the support. The iron(III) complex of the glycine-modified material was the most active of the amino acid supported catalysts. Factors that affected the rate of reaction, such as the concentration of H 2 O 2 , the amount of the catalyst, the pH, and the temperature, were investigated.