Deciphering Local Structural Complexity in Zn/Ga-ZrO2 CO2 Hydrogenation Catalysts DOI
Davide Salusso, Pierfrancesco Ticali, Dragos Stoian

et al.

The Journal of Physical Chemistry Letters, Journal Year: 2024, Volume and Issue: 15(16), P. 4494 - 4500

Published: April 18, 2024

In the last few decades, massive effort has been expended in heterogeneous catalysis to develop new materials presenting high conversion, selectivity, and stability even under high-temperature high-pressure conditions. this context, CO2 hydrogenation is an interesting reaction where catalyst local structure strongly related development of active stable material hydrothermal conditions at T/P > 300 °C/30 bar. order clarify relationship between ordering its activity/stability, we herein report a combined laboratory synchrotron investigation aliovalent element (Ce/Zn/Ga)-containing ZrO2 matrixes. The results reveal influence similar average structures with different short-range orderings on properties. Moreover, further step toward comprehension oxygen vacancy formation mechanism Ce- Ga-ZrO2 catalysts reported. Finally, reported illustrate robust method guide determination ultimately help avoid overuse "solid solution" definition.

Language: Английский

Modified Co/TiO2 catalysts for CO2 hydrogenation to fuels DOI
Canio Scarfiello, Katerina Soulantica, Simon Cayez

et al.

Journal of Catalysis, Journal Year: 2023, Volume and Issue: 428, P. 115202 - 115202

Published: Nov. 10, 2023

Language: Английский

Citations

12
Unveiling Key Interface Characteristics of Ni/Yttria-Stabilized Zirconia Solid Oxide Cell Electrodes in H2O Electroreduction Using Operando X-ray Photoelectron Spectroscopy DOI

Jinming Zhang,

Mathias Barreau,

Thierry Dintzer

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(29), P. 37915 - 37926

Published: July 11, 2024

Nickel/yttria-stabilized zirconia (YSZ) composites are the most commonly used fuel electrodes for solid oxide cells. While microstructural changes of Ni/YSZ during operational conditions have been thoroughly investigated, there is limited knowledge regarding surface chemistry under working conditions. In this study, we examine interaction between and water vapor open circuit polarization conditions, utilizing near ambient pressure soft hard X-ray photoelectron spectroscopies. Miniature cells with conventional porous composite cermet cathodes were modified to facilitate direct spectroscopic observation functional electrode's areas close interface YSZ electrolyte. The results highlight dynamic in oxidation state composition H2 H2O atmospheres. We also quantify accumulation impurities on electrode surface. Through adjustments pretreatment cell, correlation nickel cell's electrochemical performance electroreduction established. It unequivocally shown that electrolysis favors NiO over Ni(OH)x, providing critical insights into mechanism Ni-phase redistribution within long-term operation. Depth-dependent photoemission measurements, combined theoretical quantitative simulations, reveal Ni phases uniformly mixed electrolysis. This differs from expectation a NiO-shell/Ni-core configuration gas phase oxidation. These findings provide crucial relevant electrolysis, elucidating their impact cell.

Language: Английский

Citations

2
Deciphering Local Structural Complexity in Zn/Ga-ZrO2 CO2 Hydrogenation Catalysts DOI
Davide Salusso, Pierfrancesco Ticali, Dragos Stoian

et al.

The Journal of Physical Chemistry Letters, Journal Year: 2024, Volume and Issue: 15(16), P. 4494 - 4500

Published: April 18, 2024

In the last few decades, massive effort has been expended in heterogeneous catalysis to develop new materials presenting high conversion, selectivity, and stability even under high-temperature high-pressure conditions. this context, CO2 hydrogenation is an interesting reaction where catalyst local structure strongly related development of active stable material hydrothermal conditions at T/P > 300 °C/30 bar. order clarify relationship between ordering its activity/stability, we herein report a combined laboratory synchrotron investigation aliovalent element (Ce/Zn/Ga)-containing ZrO2 matrixes. The results reveal influence similar average structures with different short-range orderings on properties. Moreover, further step toward comprehension oxygen vacancy formation mechanism Ce- Ga-ZrO2 catalysts reported. Finally, reported illustrate robust method guide determination ultimately help avoid overuse "solid solution" definition.

Language: Английский

Citations

1