I am thinking about starting a research to publish in a peer reviewed journal. However, I wonder if a literature review is a research paper. For instance, if I wrote a paper about EU-Russia affairs in a form of literature review, would it have a chance to be published?
Literature reviews, often referred to by journals as just "Reviews" can and are their own form of research paper. My very first publication was a review like this, so it's clearly possible.
How viable a paper like that is will probably depend on the conventions of your field. For example, mine generally requires that these "expert reviews" (in contrast to a meta-analysis or systematic review) be solicited by the editor, not cold submitted. That involves shopping your manuscript around a little to see if anyone is willing to "invite" it, having a senior person backing you who can prompt a colleague to invite it, or finding a journal who accepts cold submitted reviews.
It definitely can. I also think it's a good first move in a PhD, although I had a hard time mapping out a field that I was new to (compared to a person working in the area for years).
I summarized some of the insights I gained from that process in a blog article: http://carl-witt.de/writing-a-literature-review/
Yes. However, make sure that your area is both interesting and manageable within the time you planned for publishing on it. Some interesting areas in my field need a year simply for reading.
(Sorry, folks, that's all I have to say, since your URL is dead as of now...)