Reduction Thermodynamics of Sr1−xCexMnO3 and CexSr2−xMnO4 Perovskites for Solar Thermochemical Hydrogen Production,Energy Technology

当前位置： X-MOL 学术 › Energy Technol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Reduction Thermodynamics of Sr1−xCexMnO3 and CexSr2−xMnO4 Perovskites for Solar Thermochemical Hydrogen Production
Energy Technology ( IF 3.6 ) Pub Date : 2021-08-25 , DOI: 10.1002/ente.202100515
Anyka M. Bergeson-Keller ₁ , Michael D. Sanders ₁ , Ryan P. O’Hayre ₁

Affiliation

Herein, the compositional families Sr_1−xCe_xMnO₃ (SCMX, X = 100x, x = 0.10, 0.20, and 0.30) and Ce_xSr_2−xMnO₄ (CSMX, X = 100x, x = 0.10, 0.20, and 0.30) are studied to determine the effects of perovskite structure and cerium content on thermal reduction thermodynamics and the resulting impact on solar thermochemical hydrogen production (STCH). Relying on thermogravimetric results from oxygen nonstoichiometry experiments, fits for various thermodynamic quantities are produced, including defect-reaction specific enthalpy (

Δ H^{°})

and entropy (

Δ S^{°}

), as well as the δ-dependent standard partial molar enthalpy,

Δ {\bar{h}}_{O}^{\circ}

, and entropy

Δ {\bar{s}}_{O}^{\circ}

, of oxygen as a function of composition within these two perovskite families. The results of this thermodynamic study are also discussed in the context of structure and cerium dopant level. Experimental hydrogen production results show that the SCM family produces slightly larger amounts of hydrogen per mole of oxide compared with the CSM family under similar reduction and oxidation temperature conditions, however, a direct correlation between structure, cerium content, and water-splitting capacity could not be discerned.

中文翻译：

用于太阳能热化学制氢的 Sr1−xCexMnO3 和 CexSr2−xMnO4 钙钛矿的还原热力学

在此，组成族 Sr _{1− x} Ce _x MnO ₃ (SCMX, X = 100 x , x = 0.10, 0.20, 和 0.30) 和 Ce _x Sr _{2- x} MnO ₄ (CSMX, X = 100 x , x = 0.10 、0.20 和 0.30) 被研究以确定钙钛矿结构和铈含量对热还原热力学的影响以及由此产生的对太阳能热化学制氢 (STCH) 的影响。依靠氧非化学计量实验的热重结果，产生了适合各种热力学量的结果，包括缺陷反应比焓（