The following websites can help you decide on a persuasive research paper topic:
Your topic must be arguable.
Pick a topic that is interesting to you.
Avoid topics that have been over done.
Do some preliminary or background research on your topic.
CQ Researcher also has a 'Browse Topics' function. You can also view the most popular subjects in the 'Hot Topics' column on the right side of the page. This database provides award-winning in-depth coverage of the most important issues of the day. Reports are written by experienced journalists, footnoted, and professionally fact-checked. Full-length articles include an overview, historical background, chronology, pro/con feature, plus resources for additional research.