|MadSci Network: Biochemistry|
Catalase is inhibited by a number of small molecules, including ammonia, HCN, and by azide. I am unaware of any inhibitor that is specific solely for catalase. There is a very large amount of literature on this enzyme. I would recommend that you search using the Pub Med search engine of the National Institutes of Health at: www.pubmed.gov
This free database allows you to view the abstracts for articles, which will contain enough information to allow you to survey the vast literature on this enzyme.
Try the links in the MadSci Library for more information on Biochemistry.