title: Ln0.5 A0.5 MnO3 (Ln=Lanthanide, A= Ca, Sr) Perovskites Exhibiting Remarkable Performance in the Thermochemical Generation of CO and H2 from CO2 and H2 O.
abstract: Perovskite oxides of the Ln0.5 A0.5 MnO3 (Ln=lanthanide, A=Sr, Ca) family have been investigated for the thermochemical splitting of H2 O and CO2 to produce H2 and CO respectively. The amounts of O2 and CO produced strongly depend on the size of the rare earth ions and alkaline earth ions. The manganite with the smallest rare earth possessing the highest distortion and size disorder as well as the smallest tolerance factor, gives out the maximum amount of O2 , and, hence, the maximum amount of CO. Thus, the best results are found with Y0.5 Sr0.5 MnO3 , which possesses the highest distortion and size disorder. Y0.5 Sr0.5 MnO3 shows remarkable fuel production activity even at the reduction and oxidation temperatures as low as 1200 °C and 900 °C, respectively.
authors: Chemistry and Physics of Materials Unit, New Chemistry Unit, Sheikh Saqr Laboratory, International Centre for Materials Science (ICMS) and CSIR Centre of Excellence in Chemistry, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O. Bangalore-560064 (India).
authors: Sunita
authors: S
authors: Dey
authors: B S
authors: BS
authors: Naidu
authors: C N R
authors: CN
authors: Rao
keywords: energy conversion; perovskite manganites; syngas; thermochemical CO2 splitting; water splitting