Scholarly articles are written by "experts" in a field (e.g. professors, researchers) to communicate research and theory to others who are interested in in-depth knowledge. They are usually long (more than 5 pages), and contain bibliographies or reference lists.
Peer-Reviewed articles, are scholarly articles that are written by "experts" and evaluated by other experts in a field (peers) before they are published.
Learn more on the Finding Articles Guide.