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Solid solution-type Sm–Pr–O supported nickel-based catalysts for auto-thermal reforming of acetic acid: the role of Pr in solid solution.

Authors :
Liu, Jinbo
Huang, Jia
Ding, Chenyu
Liao, Fuxia
Shu, Chenghong
Huang, Lihong
Source :
New Journal of Chemistry; 5/28/2024, Vol. 48 Issue 20, p9340-9351, 12p
Publication Year :
2024

Abstract

Hydrogen, as a promising energy carrier, can be extracted from renewable biomass derived acetic acid (HAc). Ni-based catalysts supported on solid solution of Sm<subscript>2−x</subscript>Pr<subscript>x</subscript>O<subscript>3±δ</subscript> were prepared using a coprecipitation method and evaluated in auto-thermal reforming (ATR) of HAc for hydrogen production. The results revealed that Pr species infiltrated the Sm<subscript>2</subscript>O<subscript>3</subscript> lattice and formed a solid solution structure with oxygen vacancy defects, in which the redox process of Sm<superscript>3+</superscript> + Pr<superscript>3+</superscript> Sm<superscript>2+</superscript> + Pr<superscript>4+</superscript> enhanced oxygen mobility, facilitating gasification of the coking precursor and suppressing carbon deposition. DFT analysis also confirmed that Pr doping into the Sm<subscript>2−x</subscript>Pr<subscript>x</subscript>O<subscript>3±δ</subscript> solid solution significantly lowered the energy barrier by 112 kJ mol<superscript>−1</superscript> for formation of oxygen vacancies. Additionally, the interaction between Ni<superscript>0</superscript> and Sm<subscript>2−x</subscript>Pr<subscript>x</subscript>O<subscript>3±δ</subscript> effectively improved the dispersion of Ni<superscript>0</superscript> metal particles, inhibiting sintering of Ni species. Consequently, the NSP10 catalyst (Ni<subscript>0.80</subscript>Sm<subscript>1.72</subscript>Pr<subscript>0.24</subscript>O<subscript>3.74±δ</subscript>) exhibited outstanding catalytic performance for hydrogen production: the conversion of HAc approached 100%, while the hydrogen yield remained stable at 2.75 mol-H<subscript>2</subscript>/mol-HAc. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
11440546
Volume :
48
Issue :
20
Database :
Complementary Index
Journal :
New Journal of Chemistry
Publication Type :
Academic Journal
Accession number :
177354111
Full Text :
https://doi.org/10.1039/d4nj00144c