Hydrogen plays a key role in deep decarbonization to tackle the two–degree–scenario (2DS) set by the Paris Climate Agreement. It has been proposed that decarbonization through hydrogen economy could achieve half of the reduction in carbon dioxide emission required to realize the 2DS. Presently, the most popular and economical commercial process for H2 production is steam–methane reforming, which uses fossil fuels as the raw material and produces comparable amounts of CO2 as the by–product. It is definitely an environmental unfriendly and a non–sustainable H2 production process, and development of green H2 production is in urgent need. In this regard, renewable energy driven electrolytic water splitting has been gaining rapidly increasing popularity and is considered by many the most promising green H2 production process for future hydrogen economy infrastructure. It is also considered a necessary energy storage approach to resolve the detrimental unreliability and intermittency issues of renewable energies. The high cost of electricity however severely limits the prevailing of this technology, and cost–effective highly efficient and stable electrocatalysts, aiming to reduce the necessary working potential for cost competiveness, are critically important for the prevailing of the technology. Among the many existing approaches, engineering synergistic effects of multi-component catalysts is one key for breakthrough catalyst design. Here, I present three recent examples to illustrate the strategy.[1-3]
 Senthil Raja D, Chuah X-F, Lu S-Y. In situ grown bimetallic MOF as highly efficient bifunctional electrocatalyst for overall water splitting with ultrastability at high current densities. Adv Energy Mater 2018; 8:1801065.
 Senthil Raja D, Lin H-W, Lu S-Y. Synergistically well-mixed MOFs grown on nickel foam as highly efficient durable bifunctional electrocatalysts for overall water splitting at high current densities. Nano Energy 2019; 57: 1-13.
 Senthil Raja D, Huang C-L, Chen Y-A, Choi YM, Lu S-Y. Composition-balanced trimetallic MOFs as ultra-efficient electrocatalysts for oxygen evolution reaction at high current densities. Appl Catal B – Environ 2020; 279: 119375.
Professor Shih-Yuan Lu received his BS and PhD degrees, both in chemical engineering, from the National Taiwan University in 1983 and University of Wisconsin at Madison in 1988, respectively. Before joining the Department of Chemical Engineering of the National Tsing Hua University, Taiwan as an Associate Professor in 1993, he worked as a senior engineer at Inland Steel Co., USA from 1989 to 1992 and as an associate scientist at SCM Chemicals, USA from 1992 to 1993. He was promoted to full Professor in 1996 and awarded Tsing Hua Distinguished Professorship in 2012 and Tsing Hua Chair Professorship in 2017. Dr. Lu served as the Chairman of the department from 2007 to 2010 and Associate Dean of the College of Engineering from 2012 to 2015. He has received several recognitions, in both research and teaching, including fellows of The Royal Society of Chemistry and International Association of Advanced Materials in 2020, Outstanding Teaching Award of the National Tsing Hua University three times in 2005, 2013, and 2020, Prof. Zai-De Lai Award of The Chinese Institute of Chemical Engineers in 2005, Outstanding Research Award of the National Science Council (now Ministry of Science and Technology) of the Executive Yuan, Taiwan twice in 2006 and 2016, and Y. Z. Hsu Scientific Paper Award in Nanotechnology of Far Eastern Y. Z. Hsu Science and Technology Memorial Foundation in 2008. Dr. Lu currently serves as an editorial board member in J. of the Chinese Institute of Engineering, an editor in Adv. Powder Technology, and a consulting editor in J. of the Taiwan Institute of Chemical Engineers. His research focuses on preparation of nanomaterials and nanostructure and their applications in energy and environment, including electrochemical hydrogen generation and lithium ion based energy storage, and has coauthored over 200 academic papers.