Harnessing overlapped temperature-salinity gradient in solar-driven interfacial seawater evaporation for efficient steam and electricity generation

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外文摘要：Solar-driven interfacial water evaporation(SIWE)offers a superb way to leverage concentrated solar heat to minimize energy dissipation during seawater desalination.It also engenders overlapped temperature-salinity gradient(TSG)between water-air interface and adjacent seawater,affording opportunities of har-nessing electricity.However,the efficiency of conventional SIWE technologies is limited by significant challenges,including salt passivation to hinder evaporation and difficulties in exploiting overlapped TSG simultaneously.Herein,we report self-sustaining hybrid SIWE for not only sustainable seawater desalination but also efficient electricity generation from TSG.It enables spontaneous circulation of salt flux upon seawater evaporation,inducing a self-cleaning evaporative interface without salt passivation for stable steam generation.Meanwhile,this design enables spatial separation and simultaneous utiliza-tion of overlapped TSG to enhance electricity generation.These benefits render a remarkable efficiency of 90.8％in solar energy utilization,manifesting in co-generation of solar steam at a fast rate of 2.01 kg m-2-h-1 and electricity power of 1.91 W m-2 with high voltage.Directly interfacing the hybrid SIWE with sea-water electrolyzer constructs a system for water-electricity-hydrogen co-generation without external electricity supply.It produces hydrogen at a rapid rate of 1.29 L h-1 m-2 and freshwater with 22 times lower Na+concentration than the World Health Organization(WHO)threshold.

外文关键词：

Solar-driven interfacial water evaporationSteam generationElectricity generationSeawater

作者：

Peida Li、Dongtong He、Jingchang Sun、Jieshan Qiu、Zhiyu Wang

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作者单位：

State Key Lab of Fine Chemicals,Liaoning Key Lab for Energy Materials and Chemical Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China

School of Physics and Electronic Technology,Liaoning Normal University,Dalian 116029,Liaoning,China

College of Chemical Engineering,Beijing University of Chemical Technology,Beijing 100029,China

基金：

National Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaInnovation and Technology Fund of DalianInnovation and Technology Fund of DalianLiaoning Normal University 2022 Outstanding Research Achievements Cultivation Fund

项目编号：

2022YFB41016002022YFB41016055237217551972040N2023JJ12GX0202022JJ12GX02322GDL002

出版年：

2024

DOI：

10.1016/j.jechem.2024.04.020

能源化学

中国科学院大连化学物理研究所中国科学院成都有机化学研究所

能源化学

CSTPCDEI

影响因子：0.654

ISSN：2095-4956

年,卷(期)：2024.95(8)