Siegfried R. Waldvogel is full professor at the Johannes Gutenberg University in Mainz, Germany. He studied Chemistry in Konstanz and received his PhD in 1996 from the University of Bochum/Max-Planck-Institute for Coal Research. Carlos A. Martínez-Huitle is currently Associate Professor in the Institute of Chemistry at the Federal University of Rio Grande do Norte. He graduated in Chemistry at Universidad de las Américas-Puebla, México. Bernardo A. Frontana-Uribe graduated in Chemistry and MSc in organic chemistry at Universidad Nacional Autonoma de México (UNAM). In 1999, received his PhD in Chemical Sciences at the University of Rennes I in France.