Hydrogen,a prospective green fuel with the advantages of high calorific value and no byproducts,is a main focus in the new energy area[1].Many mature ways to produce H2 include reform-ing fossil fuels and water electrolysis.Reforming fossil fuels occupy the vast majority of hydrogen production because of their low cost.However,it is unsustainable and polluting[2].Water electrolysis is an eco-friendly way to produce high-purity H2,although the high costs resulting from its required high voltage hinder large-scale application.The high voltage is attributed to the oxygen evolution reaction(OER)in the anode.The high theoretical voltage(1.23 V),and the extra overpotential of OER results in massive electrical energy consumption.Much research on the OER mechanism has proceeded,and various efficient catalysts have been developed to reduce the resource input[3,4].However,the onset potential of OER is still larger than 1.23 VRHE because of thermodynamic con-straints.Moreover,the different production rates of H2 and O2 might cause gas crossover through the membrane and formulate explosible mixtures,which bring potential security risks[5].There-fore,developing a new H2 production system to overcome these problems is imperative.

Ming Yang;Shuangyin Wang;Yuqin Zou

State Key Laboratory of Chem/Bio-Sensing and Chemometrics,Provincial Hunan Key Laboratory for Graphene Materials and Devices,College of Chemistry and Chemical Engineering,Hunan University,Changsha 410082,China;Shenzhen Institute of Hunan University,Shenzhen 518057,China

科学通报（英文版）

[1]Ming Yang;Shuangyin Wang;Yuqin Zou-.A bipolar hydrogen production electrolysis system)[J].科学通报（英文版）,2022(17):1713-1715

explosible

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