Journal of Materials Science

, Volume 53, Issue 9, pp 6796–6806 | Cite as

Notable hydrogen production on La x Ca1−xCoO3 perovskites via two-step thermochemical water splitting

  • Lulu Wang
  • Mohammad Al-Mamun
  • Porun Liu
  • Yun Wang
  • Hua Gui Yang
  • Huijun Zhao
Energy materials


High-performance thermochemical water splitting catalyst is the key in solar-driven H2 production for the development of sustainable and clean energy technology. Perovskite oxides have been considered promising redox catalysts for two-step thermochemical H2O splitting cycles due to their remarkable oxygen exchange capacity at low thermal heating temperatures. This study is the first to investigate perovskite series of La1−xCa x CoO3 for two-step thermochemical H2O splitting cycles. The Ca doping contents in La1−xCa x CoO3 perovskites showed a significant effect on the O2 and H2 production performances. Increasing the Ca doping content has greatly increased O2 evolution during the thermal reduction process. However, high Ca dopant content significantly weakened the reaction thermodynamics of the subsequent H2O splitting and led to lower re-oxidation yields. After tuning the Ca doping level from 0.2 to 0.8, La0.6Ca0.4CoO3 was identified as the best trade-off among the tested La1−xCa x CoO3 perovskites. The thermal reduction and water splitting temperatures were also systematically investigated to optimize the thermochemical operational conditions. La0.6Ca0.4CoO3 showed maximum H2 production of 587 µmol g−1 when the two-step thermochemical H2O splitting carried out between 1300 and 900 °C, eighteen times higher than that of CeO2 under the same experimental condition. More importantly, La0.6Ca0.4CoO3 also exhibited fairly good catalytic stability during the thermochemical cycling test and has strong potential for long-term applications.



This work was financially supported by the Australian Research Council (ARC) and the National Natural Science Foundation of China (Grant Nos. 51372248, 51432009).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

10853_2018_2004_MOESM1_ESM.docx (2.3 mb)
Supplementary material 1 (DOCX 2305 kb)


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Authors and Affiliations

  1. 1.Centre for Clean Environment and Energy, Gold Coast CampusGriffith UniversitySouthportAustralia
  2. 2.Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and EngineeringEast China University of Science and TechnologyShanghaiChina
  3. 3.Centre for Environmental and Energy Nanomaterials, Institute of Solid State PhysicsChinese Academy of SciencesHefeiChina

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