scholarly journals Hydrogen Production from the Air

2021 ◽  
Author(s):  
Gang Kevin Li ◽  
Jining Guo ◽  
Yuecheng Zhang ◽  
Ali Zavabeti ◽  
Kaifei Chen ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Gas ◽  
Low Carbon ◽  
Faradaic Efficiency ◽  
Minimal Impact ◽  
Low Carbon Economy ◽  
Significant Challenge ◽  
Stable Performance ◽  
Semi Arid ◽  
Carbon Economy

Abstract Hydrogen gas (H2) produced by water splitting using renewable energy, namely green hydrogen, is the most promising energy carrier of the low-carbon economy1–6. However, the geographic mismatch between renewables distribution and freshwater availability poses a significant challenge to green hydrogen production7–9. Here, we demonstrate a method of directly producing H2 from the air, namely, capturing freshwater from the atmosphere using hygroscopic electrolyte and converting it to H2 by electrolysis powered by solar energy. A prototype H2 generator has been successfully established and operated for 12 consecutive days with a stable performance at an average Faradaic efficiency around 95%. This so-called direct air electrolysis (DAE) module can work under low relative humidity (20%) environment, overcoming water supply issues and producing green hydrogen sustainably with minimal impact to the environment. The DAE modules can be easily scaled to provide H2 to remote, arid/semi-arid, and scattered areas.

Hydrogen Commonly Applicable to Medicine to Agriculture: From Molecular Mechanisms to the Field

2020 ◽  
Vol 26 ◽  
Author(s):  
Longna Li ◽  
Wang Lou ◽  
Lingshuai Kong ◽  
Wenbiao Shen
Keyword(s):  
Molecular Mechanisms ◽  
Field Trials ◽  
Hydrogen Gas ◽  
Agricultural Products ◽  
Nitrite Accumulation ◽  
Low Carbon ◽  
Plant Tolerance ◽  
Low Carbon Economy ◽  
Biotic Stresses ◽  
Safety Issues

Abstract:: The emerging field of hydrogen biology has to date mainly been applied in medicine. However, hydrogen biology can also enable positive outcomes in agriculture. Agriculture faces significant challenges resulting from a growing population, climate change, natural disasters, environment pollution, and food safety issues. In fact, hydrogen agriculture is a practical application of hydrogen biology, which may assist in addressing many of these challenges. It has been demonstrated that hydrogen gas (H2) may enhance plant tolerance towards abiotic and biotic stresses, regulate plant growth and development, increase nutritional values, prolong the shelf life, and decrease the nitrite accumulation during the storage of vegetables, as well as increase the resilience of livestock to pathogens. Our field trials show that H2 may have a promising potential to increase yield and improve the quality of agricultural products. This review aims to elucidate mechanisms for a novel agricultural application of H2 in China. Future development of hydrogen agriculture is proposed as well. Obviously, hydrogen agriculture belongs to low carbon economy, and has great potential to provide “safe, tasty, healthy, and highyield” agricultural products so that it may improve the sustainability of agriculture.

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