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Chemical storage of hydrogen in synthetic liquid fuels:building block for CO_(2)-neutral mobility

Clean Energy 2021年第2期5卷 180-186页

作者： R.P.Lee L.G.Seidl B.Meyer Iinstitute of energy process engineering and chemical engineering tu bergakademie freibergfuchsmuehlenweg 9d09599 freiberggermany fraunhofer institute for microstructure of materials and systems imws branch lab freiberg—circular carbon technologiesfuchsmuehlenweg 9d09599 freiberggermany

Green hydrogen is anticipated to play a major role in the decarbonization of the mobility *** chemical storage in CO_(2)-neutral synthetic liquid fuels is advantageous in terms of safety and reliability compared to other hydrogen storage developments,and thus represents a complementary building block to developments in electric and hydrogen mobility for the low-carbon transition in the mobility *** development is especially relevant for transport sectors which will have no alternatives to liquid fuels in the foreseeable *** this paper,three alternative technological routes for the chemical storage of hydrogen in CO_(2)-neutral synthetic liquid fuels are identified and comparatively evaluated in terms of feedstock potential,product potential,demand for renewable electricity and associated costs,efficiency as well as expected market *** all three routes exhibited similar levels of overall efficiencies,electricity-based liquid fuels in Germany are currently limited by the high cost and limited supply of renewable *** contrast,liquid fuels generated from biogenic waste have a constant supply of biogenic feedstock and are largely independent from the supply and cost of renewable electricity.

关键词： CO_(2)-neutral synthetic liquid fuels renewable hydrogen chemical storage waste-to-fuels electricity-based fuels circular carbon technologies

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Reversed configuration of photocatalyst to exhibit improved properties of basic processes compared to conventional one

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Science China Chemistry 2020年第6期63卷 771-776页

作者： Juhong Lian Yu Qi Yunfeng Bao Zixi Yin Yang Zhang Nengcong Yang Naijia Guan Shengye Jin Landong Li Fuxiang Zhang State Key Laboratory of Catalysis iChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian National Laboratory for Clean EnergyDalian 116023China School of Materials Science and Engineering National Institute for Advanced MaterialsNankai UniversityTianjin 300350China State Key Laboratory of Molecular Reaction Dynamics and Collaborative Innovation Center of Chemistry for Energy Materials(iChEM) Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Performances of semiconductor photocatalysts are integrally determined by efficiencies of basic processes such as light absorption,charge separation and surface catalysis,but conventional configurations of photocatalysts normally suffers from the competition of light absorption originating from cocatalyst deposition and limited interface charge separation between the photocatalyst and *** we give the first proof-of-concept illustration that a reversed configuration of photocatalysts with a core/shell structure of microsized Mo2N cocatalysts and nanosized CdS photocatalysts,which exhibits superior solar hydrogen production to the conventional configuration with nanosized Mo2N cocatalysts deposited on the surface of CdS *** is revealed that the reversed configuration outperforms the conventional one in all areas of light absorption,charge separation and surface ***,the special core/shell structure introduced here can well avoid the competition of light absorption by cocatalysts and make an effective confinement effect to promote the surface catalysis of *** finding provides an alternative strategy to improve performances of photocatalysts.

关键词： photocatalyst nitride semiconductor renewable hydrogen core/shell

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