Energy analysis on the water cycle consisting of photo catalyzing water splitting and hydrogen reacting with oxygen in a hydrogen fuel cell

Nong, Guangzai; Li, Yijing; Yin, Yongjun

doi:10.1016/j.cpletx.2019.100033

Cited by 4 publications

(2 citation statements)

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“…The magnitudes of reaction enthalpies also indicate that the possible water splitting and chemical conversion are negligible. The magnitudes of enthalpies of water splitting are as high as 285 kJ/mol for the range up to 400 °C. , …”

Section: Resultsmentioning

confidence: 98%

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Systematic Water Uptake Energetics of Yttrium-Doped Barium Zirconate—A High Resolution Thermochemical Study

et al. 2020

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A combination of surface area analyzer and microcalorimetry was employed to investigate the in situ water uptake energetics and the mechanism of proton incorporation in yttrium-doped barium zirconate in the temperature range 200−400 °C. The BaZr 1−x Y x O 3 solid solutions are made with variable yttrium content (x = 10, 20, and 30 mol %) by a controlled oxidant-peroxo synthesis method. The water uptake increases as the partial pressure of water increases; however, no saturation in the hydration isotherm is observed, implying further reaction at higher p H 2 O . The results suggest three distinct regions of hydration energies as a function of water content. The first water uptake enthalpy values showed high exothermicity, −140, −158, and −157 kJ mol −1 for BaZr 1−x Y x O 3 (x = 10, 20, and 30 mol %), respectively, at 400 °C, and the strong exothermic contribution supports the dissociative incorporation of water. The stepwise in situ hydration energetics is essential to understand the mechanisms of water incorporation and the role of H 2 O uptake in transport properties.

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Section: Resultsmentioning

confidence: 98%

“…The magnitudes of enthalpies of water splitting are as high as 285 kJ/mol for the range up to 400 °C. 34,35…”

Section: ■ Results and Discussionmentioning

confidence: 99%