This article has been retracted at the request of the Editor-in-Chief, with agreement of the authors: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). Substantial parts of this review paper are similar to the texts of existing papers in the literature. The co-authors state that the corresponding author submitted the manuscript without their approval. The following works are affected: IEEE Transactions on Power Electronics, 26 (2011) 3472-3480, http://dx.doi.org/10.1109/TPEL.2011.2161096. The Journal of Physical Chemistry Letters, 4 (2013) 1260-1267, http://dx.doi.org/10.1021/jz4002967. The Journal of Physical Chemistry Letters, 4 (2013), 3367-3376, http://dx.doi.org/10.1021/jz4014163. Physical Chemistry Chemical Physics, 16 (2014), 6519-6538, http://dx.doi.org/10.1039/c3cp55186e. The Authors unreservedly apologise for this violation of the publishing policies, and offer sincere apologies to the parties affected. The journal apologises to its readers and the authors that the overlap was not detected during the submission and review process.