Citation: Lulu Wang, Mohammad Al-Mamun, Porun Liu, Yun Wang, Hua Gui Yang, Huijun Zhao. La_1-xCa_xMn_1-yAl_yO₃ perovskites as efficient catalysts for two-step thermochemical water splitting in conjunction with exceptional hydrogen yields[J]. Chinese Journal of Catalysis, ;2017, 38(6): 1079-1086. doi: 10.1016/S1872-2067(17)62820-1 shu

La_1-xCa_xMn_1-yAl_yO₃ perovskites as efficient catalysts for two-step thermochemical water splitting in conjunction with exceptional hydrogen yields

a. Centre for Clean Environment and Energy, Griffith University, Gold Coast Campus, QLD 4222, Australia;
b. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China;
c. Centre for Environmental and Energy Nanomaterials, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, China

Received Date: 17 February 2017
Revised Date: 19 March 2017

Fund Project: This work was supported by the Australian Research Council (FT120100913) and the National Natural Science Foundation of China (51372248, 51432009)

Solar-driven thermochemical water splitting represents one efficient route to the generation of H₂ as a clean and renewable fuel. Due to their outstanding catalytic abilities and promising solar fuel production capacities, perovskite-type redox catalysts have attracted significant attention in this regard. In the present study, the perovskite series La_1-xCa_xMn_1-yAl_yO₃ (x, y = 0.2, 0.4, 0.6, or 0.8) was fabricated using a modified Pechini method and comprehensively investigated to determine the applicability of these materials to solar H₂ production via two-step thermochemical water splitting. The thermochemical redox behaviors of these perovskites were optimized by doping at either the A (Ca) or B (Al) sites over a broad range of substitution values, from 0.2 to 0.8. Through this doping, a highly efficient perovskite (La_0.6Ca_0.4Mn_0.6Al_0.4O₃) was developed, which yielded a remarkable H₂ production rate of 429 μmol/g during two-step thermochemical H₂O splitting, going between 1400 and 1000 ℃. Moreover, the performance of the optimized perovskite was found to be eight times higher than that of the benchmark catalyst CeO₂ under the same experimental conditions. Furthermore, these perovskites also showed impressive catalytic stability during two-step thermochemical cycling tests. These newly developed La_1-xCa_xMn_1-yAl_yO₃ redox catalysts appear to have great potential for future practical applications in thermochemical solar fuel production.
- Two-step thermochemical route,
- Water splitting,
- Solar fuel,
- Perovskite-type redox catalyst,
- Hydrogen production
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

La1-xCaxMn1-yAlyO3 perovskites as efficient catalysts for two-step thermochemical water splitting in conjunction with exceptional hydrogen yields

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通讯作者: 陈斌, bchen63@163.com

La_1-xCa_xMn_1-yAl_yO₃ perovskites as efficient catalysts for two-step thermochemical water splitting in conjunction with exceptional hydrogen yields