This will largely depend on the size of your kitchen, but try to hang art in a place where it won’t get damaged by water or heat. As long as your art is out of reach of the sink or hob you can get creative.
Remember it doesn’t only need to hang on walls, framed art can look great propped up on shelves on a counter or in alcoves. If you have large open wall spaces you’re spoilt for choice. When being commissioned for a piece of art I always visit the site and will happily advise clients on the right size and location for their space and even what colours would work well