Hi,
Sure, but the best location for the sitemap is your catalog dir. See https://www.google.com/webmasters/sitemaps/...sitemapLocation. If your sitemap is located in a subdirectory (catalog/google) there could be some problems with Search-Engine Safe URLs because Google would assume that e.g. http://www.domain.com/catalog/index.php/cPath/3 is a subdirectory. In that case these URLs are not considered valid.
Regards,
Raphael