The best replacement for catalase is peroxidase.

The best alternatives to catalase are rated as following:
★★★★★  peroxidase
★  coagulase
★  superoxide dismutase
★  oxidase

Your alternative for catalase is not listed? Suggest!
Speaking about catalase, one probably shouldn't forget about hydrogen peroxide.

Other search terms related to catalase and their ratings are:
★★★★★ hydrogen peroxide
★★ hydrogen peroxide reaction
You have in mind a companion for catalase and it is not yet here? Propose!



Google Trends

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catalase
peroxidase
coagulase