Efficient hydrogen production through the chemical looping redox cycle of YSZ supported iron oxides

作     者：Li Ma Yu Qiu Min Li Dongxu Cui Shuai Zhang Dewang Zeng Rui Xiao Li Ma;Yu Qiu;Min Li;Dongxu Cui;Shuai Zhang;Dewang Zeng;Rui Xiao

作者机构：Key Laboratory of Energy Thermal Conversion and Control of Ministry of EducationSchool of Energy and EnvironmentSoutheast UniversityNanjing210096China 

出 版 物：《Green Energy & Environment》 (绿色能源与环境（英文版）)

年 卷 期：2021年第6卷第6期

页      面：875-883页

核心收录：

学科分类：081702[工学-化学工艺] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：the National Natural Science Foundation of China(Grant No.51906041) the Natural Science Foundation of Jiangsu Province(Grant NO.BK20190360) the National Science Foundation for Distinguished Young Scholars of China(Grant No.51525601) 

主　　题：Hydrogen production Chemical looping Oxygen carriers Support effect 

摘      要：The chemical looping process,where an oxygen carrier is reduced and oxidized in a cyclic manner,offers a promising option for hydrogen production through splitting water because of the much higher water splitting efficiency than solar electrocatalytic and photocatalytic process.A typical oxygen carrier has to comprise a significant amount of inert support,to maintain stability in multiple redox cycles,thereby resulting in a trade-off between the reaction reactivity and ***,we proposed the use of ion-conductive yttria-stabilized zirconia(YSZ)support Fe_(2)O_(3)to prepare oxygen carriers *** obtained Fe_(2)O_(3)/YSZ composites showed high reactivity and ***,Fe_(2)O_(3)/YSZ-20(oxygen storage capacity,24.13%)exhibited high hydrogen yield of~10.30 mmol g^(-1) and hydrogen production rate of~0.66 mmol g^(-1) min^(-1) which was twice as high as that of Fe_(2)O_(3)/Al_(2)O_(3).Further,the transient pulse test indicated that active oxygen diffusion was the ratelimiting step during the redox *** electrochemical impedance spectroscopy(EIS)measurement revealed that the YSZ support addition facilitated oxygen diffusion of materials,which contributed to the improved hydrogen production *** support effect obtained in this work provides a potentially efficient route for the modification of oxygen carrier materials.