You can raise the interest of attendees who are not per definition interested in your subject, by giving them the impression that they will learn something from your talk. Note that this part of the audience is more interested in general aspects than in the details. You certainly need to give them a good introduction into the background of your subject, before they can fully appreciate the subtleties of your work. Hence, you should spend at least some 30% of your time on general themes, e.g. what is known about the catalytic reaction and the catalysts and how it is applied in industry, or perhaps a less known method of research that is more generally applicable, etc. A large part of the audience may find this very useful to know. But what is even more important, with sufficient background information they will understand a lot more about your specific results, i.e. that part of the talk you are most proud of.