By a News Reporter-Staff News Editor at Electronics Newsweekly -- New research on Hydrogen is the subject of a report. According to news originating from Dalian, People's Republic of China, by VerticalNews correspondents, research stated, "A photocatalyst is defined as a functional composite material with three components: photo-harvester (e.g. semiconductor), reduction cocatalyst (e.g. for hydrogen evolution) and oxidation cocatalyst (e.g. for oxidation evolution from water). Loading cocatalysts on semiconductors is proved to be an effective approach to promote the charge separation and transfer, suppress the charge recombination and enhance the photocatalytic activity."
Our news journalists obtained a quote from the research from the Dalian Institute of Chemical Physics, "Furthermore, the photocatalytic performance can be significantly improved by loading dual cocatalysts for reduction and oxidation, which could lower the activation energy barriers, respectively, for the two half reactions. A quantum efficiency (QE) as high as 93 per cent at 420 nm for H? production has been achieved for Pt-PdS/CdS, where Pt and PdS, respectively, act as reduction and oxidation cocatalysts and CdS as a photo-harvester. The dual cocatalysts work synergistically and enhance the photocatalytic reaction rate, which is determined by the slower one (either reduction or oxidation)."
According to the news editors, the research concluded: "This work demonstrates that the cocatalysts, especially the dual cocatalysts for reduction and oxidation, are crucial and even absolutely necessary for achieving high QEs in photocatalytic hydrogen production, as well as in photocatalytic water splitting."
For more information on this research see: Roles of cocatalysts in semiconductor-based photocatalytic hydrogen production. Philosophical Transactions, 2013;371(1996):20110430.
The news correspondents report that additional information may be obtained from J. Yang, State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, 457 Zhongshan Road, Dalian 116023, People's Taiwan. Additional authors for this research include H. Yan, X. Zong, F. Wen, M. Liu and C. Li.
Keywords for this news article include: Asia, Gases, Dalian, Elements, Hydrogen, Electronics, Photocatalyst, Semiconductor, Nanotechnology, Photocatalytic, Inorganic Chemicals, Emerging Technologies, People's Republic of China.
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