In:
ChemCatChem, Wiley, Vol. 14, No. 1 ( 2022-01-10)
Abstract:
In this work, a universal dopamine modification strategy is used to improve the catalytic performance of Ni/Al 2 O 3 for hydrogen production in glycerol steam reforming (GSR). Ni/Al 2 O 3 showed poor catalytic stability with rapid deactivation after 8 h of reaction in GSR. Glycerol conversion and hydrogen selectivity were significantly higher for dopamine‐modified Ni/Al 2 O 3 (by 98 % and 95 %, respectively) and this improved performance was maintained well for 21 h in the stability test. The protective carbon shell derived from dopamine was formed easily on the Ni/Al 2 O 3 surface, the aggregation of Ni nanoparticles was inhibited, and the dispersion of Ni nanoparticles was improved. The electron‐donating effect of amino group to Ni 2+ weakened the Ni‐Al 2 O 3 interaction, and then promoted the reduction of the Ni species. In addition, the decrease in the number of strong acidic sites reduced the amount of carbon deposition on dopamine‐modified Ni/Al 2 O 3 . The moderate metal‐support interaction was more conducive to the formation of filamentous carbon, which collectively contributed to the increased catalytic stability of dopamine‐modified Ni/Al 2 O 3 . The facile dopamine‐modified method significantly improves the catalytic performance and can be generalized to other catalytic reaction that involve sintering and carbon deposition issues.
Type of Medium:
Online Resource
ISSN:
1867-3880
,
1867-3899
DOI:
10.1002/cctc.202101150
Language:
English
Publisher:
Wiley
Publication Date:
2022
detail.hit.zdb_id:
2501161-3
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