Outstanding dispersion of CeO2 on reduced graphene oxide. Implications for highly dispersed Pd catalysts

Author(s)

Franchini, Carlos A. ^{[1, 2, 3]} ; Llorca, Jordi ^{[1, 2]} ; Kuznetsov, Alexei ^[4] ; Silva, Adriana M. ^[3]

Affiliation

^[1] Univ Politecn Cataluna, Inst Energy Technol, Dept Chem Engn, EEBE, Eduard Maristany 10-14, Barcelona 08019 - Spain

^[2] Univ Politecn Cataluna, Barcelona Res Ctr Multiscale Sci & Engn, EEBE, Eduard Maristany 10-14, Barcelona 08019 - Spain

^[3] Inst Nacl Pesquisas Espaciais INPE, Lab Associado Combustao & Propulsao, BR-12630000 Cachoeira Paulista, SP - Brazil

^[4] Inst Nacl Metrol Qualidade & Tecnol INMETRO, Div Metrol Mat, BR-25250020 Duque De Caxias, RJ - Brazil

• Document type: Journal article
• Source: DIAMOND AND RELATED MATERIALS; v. 109, NOV 2020.
• Web of Science Citations: 0

Abstract

In this contribution, we report a totally new and an unprecedented capability of producing nano-CeO2 evenly dispersed over reduced graphene oxide (rGO), enabling an extremely high dispersion of Pd at high loading (similar to 5% wt) in the catalyst, in one-step hydrothermal synthesis. Morphology and thermal stability of the synthesized Pd/ CeO2-rGO system are compared with Pd/rGO counterpart. High-resolution transmission microscopy studies of synthesized samples combined with X-ray diffraction, Raman and thermal analyses showed the formation of subnanometer Pd clusters on nano-CeO2 dispersed over reduced graphene oxide (rGO). Notably, rGO had a decisive role over the stabilization of CeO2 as nano-structures, leading to the outstanding Pd dispersion on this catalyst. (AU)

• FAPESP's process: 18/18798-2 - Development of Graphene Supported Catalysts for the Selective CO2 Hydrogenation toward Dimethyl Ether (DME)
• Grantee: Adriana Maria da Silva
• Support Opportunities: Regular Research Grants