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| Content Provider | Springer Nature Link |
|---|---|
| Author | Banerjee, Aparna Prasad, R. Venugopal, V. |
| Copyright Year | 2006 |
| Abstract | The Gibbs free energies of formation of Eu3RuO7(s) and Eu2Ru2O7(s) have been determined using solid-state electrochemical technique employing oxide ion conducting electrolyte. The reversible electromotive force (e.m.f.) of the following solid-state electrochemical cells have been measured: $$Cell{\left( I \right)}:{{\left( - \right)}Pt} \mathord{\left/ {\vphantom {{{\left( - \right)}Pt} {{\left\{ {Eu_{3} RuO_{7} {\left( s \right)} + Eu_{2} O_{3} {\left( s \right)} + Ru{\left( s \right)}} \right\}}}}} \right. -} {{\left\{ {Eu_{3} RuO_{7} {\left( s \right)} + Eu_{2} O_{3} {\left( s \right)} + Ru{\left( s \right)}} \right\}}}//CSZ//O_{2} {{\left( {p{\left( {O_{2} } \right)} = 21.21 kPa} \right)}} \mathord{\left/ {\vphantom {{{\left( {p{\left( {O_{2} } \right)} = 21.21 kPa} \right)}} {Pt{\left( + \right)}}}} \right. -} {Pt{\left( + \right)}}$$ $$Cell{\left( {II} \right)}:{{\left( - \right)}Pt} \mathord{\left/ {\vphantom {{{\left( - \right)}Pt} {{\left\{ {Eu_{3} RuO_{7} {\left( s \right)} + Eu_{2} Ru_{2} O_{7} {\left( s \right)} + Ru{\left( s \right)}} \right\}}}}} \right. -} {{\left\{ {Eu_{3} RuO_{7} {\left( s \right)} + Eu_{2} Ru_{2} O_{7} {\left( s \right)} + Ru{\left( s \right)}} \right\}}}//CSZ//O_{2} {{\left( {p{\left( {O_{2} } \right)} = 21.21 kPa} \right)}} \mathord{\left/ {\vphantom {{{\left( {p{\left( {O_{2} } \right)} = 21.21 kPa} \right)}} {Pt{\left( + \right)}}}} \right. -} {Pt{\left( + \right)}}$$ The Gibbs free energies of formation of Eu3RuO7(s) and Eu2Ru2O7(s) from elements in their standard state, calculated by the least squares regression analysis of the data obtained in the present study, can be given, respectively, by: $$\left\{ {\Delta _{f} G^{o} } \right.\left. {{{\left( {Eu_{3} RuO_{7} , s} \right)}} \mathord{\left/ {\vphantom {{{\left( {Eu_{3} RuO_{7} , s} \right)}} {{\left( {kJ \cdot mol^{{ - 1}} } \right)} \pm 2.5}}} \right. -} {{\left( {kJ \cdot mol^{{ - 1}} } \right)} \pm 2.5}} \right) = - 2,785.2 + 0.567 \cdot {\left( {T \mathord{\left/ {\vphantom {T K}} \right. -} K} \right)}; {\left( {{922.5 \leqslant T} \mathord{\left/ {\vphantom {{922.5 \leqslant T} {K \leqslant 1194.9}}} \right. -} {K \leqslant 1194.9}} \right)}.$$ $$\left\{ {\Delta _{f} G^{o} } \right.\left. {{{\left( {Eu_{3} Ru_{2} O_{7} , s} \right)}} \mathord{\left/ {\vphantom {{{\left( {Eu_{3} Ru_{2} O_{7} , s} \right)}} {{\left( {kJ \cdot mol^{{ - 1}} } \right)} \pm 2.9}}} \right. -} {{\left( {kJ \cdot mol^{{ - 1}} } \right)} \pm 2.9}} \right) = - 2,256.6 + 0.579 \cdot {\left( {T \mathord{\left/ {\vphantom {T K}} \right. -} K} \right)}; {\left( {{995.3 \leqslant T} \mathord{\left/ {\vphantom {{995.3 \leqslant T} {K \leqslant 1260.6}}} \right. -} {K \leqslant 1260.6}} \right)}.$$ The uncertainty estimates for Δf G o(T) include the standard deviation in e.m.f. and uncertainty in the data taken from the literature. |
| Starting Page | 291 |
| Ending Page | 295 |
| Page Count | 5 |
| File Format | |
| ISSN | 14328488 |
| Journal | Journal of Solid State Electrochemistry |
| Volume Number | 11 |
| Issue Number | 2 |
| e-ISSN | 14330768 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2006-04-12 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | System Eu–Ru–O Europium ruthenates Solid-state electrochemical technique Gibbs free energy of formation Electronic and Computer Engineering Condensed Matter Characterization and Evaluation Materials Industrial Chemistry/Chemical Engineering Analytical Chemistry Physical Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics Materials Science Electrical and Electronic Engineering Electrochemistry |
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