Details

Autor(en) / Beteiligte

• Wang, Xiuyun
• Li, Lingling
• Zhang, Tianhua
• Lin, Bingyu
• Ni, Jun
• Au, Chak-Tong
• Jiang, Lilong

Titel

Strong metal-support interactions of Co-based catalysts facilitated by dopamine for highly efficient ammonia synthesis: in situ XPS and XAFS spectroscopy coupled with TPD studies

Ist Teil von

• Chemical communications (Cambridge, England), 2019-01, Vol.55 (4), p.474-477

Ort / Verlag

England: Royal Society of Chemistry

Erscheinungsjahr

2019

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We report a new strategy for strengthening metal-support interaction and stabilizing Co nanoparticles at high temperature. Through the use of dopamine and removal of carbon layers by thermal N2 treatment, ceria-based Co catalysts that are efficient and highly stable for ammonia synthesis can be obtained. The ammonia synthesis rate at 425 °C and 1 MPa is enhanced from 3.81 mmolNH3 gcat-1 h-1 over Co/CeO2 to 19.12 mmolNH3 gcat-1 h-1 over a dopamine-mediated catalyst. The superior catalytic performances of the dopamine-mediated Co/CeO2 catalyst are associated with smaller crystalline size, stronger metal-support interaction and lower N2 activation energy.