The official Redux documentation [0] mentions using RxJS with Redux. According to the docs they work great together but you might not need Redux with RxJS.

I haven't come across a project using only React and RxJS though. There is redux-observable [1] if you haven't seen yet that combines Redux and RxJS.

[0]: http://redux.js.org/docs/introduction/PriorArt.html#rxjs

[1]: https://github.com/redux-observable/redux-observable