| Full text | |
| Author(s): |
da Silva, Anderson G. M.
[1, 2]
;
Fernandes, Cibele G.
[1]
;
Hood, Zachary D.
[3, 4]
;
Peng, Rui
[3]
;
Wu, Zili
[3]
;
Dourado, Andre H. B.
[1]
;
Parreira, Luanna S.
[1]
;
de Oliveira, Daniela C.
[5]
;
Camargo, Pedro H. C.
[6]
;
Cordoba de Torresi, I, Susana
Total Authors: 10
|
| Affiliation: | [1] I, Univ Sao Paulo, Dept Quim Fundamental, Inst Quim, Av Prof Lineu Prestes 748, BR-05508000 Sao Paulo, SP - Brazil
[2] Pontificia Univ Catolica Rio de Janeiro PUC Rio, Dept Engn Quim & Mat DEQM, Rua Marques Sao Vicente, 225 Gavea, BR-22453900 Rio De Janeiro, RJ - Brazil
[3] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 - USA
[4] Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 - USA
[5] Ctr Nacl Pesquisa Energia & Mat, Lab Nacl Luz Sincrotron, BR-13083970 Campinas, SP - Brazil
[6] Univ Helsinki, Dept Chem, AI Virtasen Aukio 1, Helsinki 00014 - Finland
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | APPLIED CATALYSIS B-ENVIRONMENTAL; v. 277, NOV 15 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
We report the optimization of both the support and the active phase of PdPt NPs supported on TiO2 nanowires to obtain highly active electro/photocatalysts for the oxygen reduction and water splitting reactions. This system displayed strong metal-support interactions, high concentration of oxygen vacancies, and PdPt NP were similar to 2 nm in size. By optimizing the loading of PdPt, both the photo- and electrocatalytic activities were improved compared to commercial materials. Interestingly, a volcano plot was obtained from the activity and the PdPt composition, and the Pd0.22P0.78-TiO2/C sample afforded the optimal performance. For instance, the amount of hydrogen produced from water splitting was 11.6 mmol/g(catalyst). For the ORR, the activity was similar to a commercial Pt catalyst, but a lower E-onset (0.87 V-RHE vs w 0.95 V-RHE) was detected. The variations in the activities with the composition correlated well with the variations in the electronic effects and the concentration of oxygen vacancies. (AU) | |
| FAPESP's process: | 15/26308-7 - Optimization of the physicochemical properties of nano -structured materials for applications in molecular recognition, catalysis and energy conversion/storage |
| Grantee: | Roberto Manuel Torresi |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 17/12407-9 - Hybrid nanostructures of transition metal oxides and conducting polymers for various applications |
| Grantee: | Anderson Gabriel Marques da Silva |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 18/25567-7 - Plasmonic electrocatalysis: investigating shape-dependent charge transfer processes in Cu2O-Au nanocrystals |
| Grantee: | Anderson Gabriel Marques da Silva |
| Support Opportunities: | Scholarships abroad - Research Internship - Post-doctor |