Account/Review for Materials Innovation Recent Improvements in the Production of Solar Fuels: From CO 2 Reduction to Water Splitting and Artificial Photosynthesis Nitish Roy,* 1 Norihiro Suzuki,* 2 Chiaki Terashima, 2 and Akira Fujishima 2 1 Department of Chemistry, University of North Bengal, Raja Rammohunpur, Darjeeling, West Bengal-734013, India 2 Photocatalysis International Research Center, Tokyo University of Science, 2641-Yamazki, Noda, Chiba 278-8510, Japan E-mail:nitu.iitg@gmail.com (N. Roy), suzuki.norihiro@rs.tus.ac.jp (N. Suzuki) Received: August 31, 2018; Accepted: October 13, 2018; Web Released: January 10, 2019 Nitish Roy Dr Nitish Roy is an Assistant Professor in the Department of Chemistry, University of North Bengal. He received a Ph.D. degree on facets dependent reactivity of nanostructured materials from the Indian Institute of Technology, Kharagpur in 2014. After his Ph.D., he joined the Tokyo University of Science, Noda Campus as a Postdoctoral Fellow working under Prof. Akira Fujishima on diamond photoelectrochemistry for CO 2 reduction. Norihiro Suzuki Dr Norihiro Suzuki is an Assistant Professor of the Photocatalysis International Research Center, Tokyo University of Science. He obtained his Doctoral Degree in Physical Chemistry in 2007 from the University of Tokyo and joined the National Institute for Materials Science (NIMS) from 2008 to 2015. From 2011 to 2012, the Japanese Society for the Promotion of Science (JSPS) awarded him a Research Fellowship for Young Scientists. His present research interest is porous ceramics and their physical properties. Chiaki Terashima Dr Chiaki Terashima received his Ph.D. degree (2003) in Electrochemical Analysis from the University of Tokyo under the supervision of Profs. A. Fujishima and K. Hashimoto. His academic career started at Nagoya University as an Associate Professor (2010–2011) in Prof. O. Takai’s group, and then moved to Tokyo University of Science in 2012. He is currently a Professor at the Photocatalysis International Research Center, Tokyo University of Science. His research interests focus on photoelectrochemistry, diamond electrochemistry, and plasma processing in liquids. Akira Fujishima Professor Akira Fujishima received his Ph.D. in Applied Chemistry from the University of Tokyo in 1971. He taught at Kanagawa University for four years and then moved to the University of Tokyo, where he became a Professor in 1986. In 2003, he retired from this position and took on the position of Chairman of the Kanagawa Academy of Science and Technology. On January 1st 2010, he became President of Tokyo University of Science (TUS). Now he is a Distinguished Professor and Director of the Photocatalysis International Research Center at TUS. His main interests are in photocatalysis, photochemistry, and diamond electrochemistry. Document type: Review/Account 178 | Bull. Chem. Soc. Jpn. 2019, 92, 178–192 | doi:10.1246/bcsj.20180250 © 2019 The Chemical Society of Japan