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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of the Pt Precursor and Loading on the Structural Parameters and Catalytic Properties of Pt/Al2O3

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Author(s):
Borges, Lais R. [1] ; Lopez-Castillo, Alejandro [2] ; Meira, Debora M. [1] ; Gallo, Jean Marcel R. [2] ; Zanchet, Daniela [3] ; Bueno, Jose Maria C. [1]
Total Authors: 6
Affiliation:
[1] Univ Fed Sao Carlos, Dept Chem Engn, Rod Washington Luis S-N, Km 235, POB 676, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Fed Sao Carlos, Dept Chem, Rod Washington Luis S-N, Km 235, POB 676, BR-13565905 Sao Carlos, SP - Brazil
[3] Univ Estadual Campinas, Inst Chem, Rod Washington Luis S-N, Km 235, POB 676, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: CHEMCATCHEM; v. 11, n. 13, p. 3064-3074, JUL 4 2019.
Web of Science Citations: 0
Abstract

The effects of promoters and additives on the electronic properties and structural properties of Pt catalysts still need to be understood. The present work investigates the effects of the Pt loading and the use of chloride additive on the structural properties of Pt/Al2O3 and its catalytic activity towards the WGS reaction. The presence of Cl affected the morphology and oxygen coverage of the Pt nanoparticles. However, these parameters did not affect the surface electronic properties, due to a compensation effect between the size of the Pt-0 core and oxygen coordinated on the shell (NPt-O). Despite the structural differences, the catalytic activity for the WGS reaction was similar for the chloride-free sample and the catalyst containing chloride. The effect of the Pt loading was also studied, with the ``apparent{''} catalytic activity per site of Pt (TOF) decreasing with increasing metal loading. Increasing the Pt loading led to an increase of the low-coordination Pt-0 sites at the surface of the NPs, resulting in stronger Pt-CO integration and consequent poisoning of the active sites. (AU)

FAPESP's process: 11/50727-9 - Development of systems for hydrogen production and for the generation and utilization of electrochemical energy
Grantee:Ernesto Rafael Gonzalez
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 10/11385-2 - Theoretical study of chemical systems
Grantee:Alejandro López Castillo
Support Opportunities: Regular Research Grants
FAPESP's process: 16/02128-2 - Design of new catalytic systems for the biorefinery
Grantee:Jean Marcel Ribeiro Gallo
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 12/00567-8 - Mechanistic study of preferential CO oxidation associate to in situ characterization of heterogeneous catalysts
Grantee:Diego Silva Paz
Support Opportunities: Scholarships in Brazil - Doctorate