da Silva, Anderson G. M.
Fernandes, Cibele G.
Hood, Zachary D.
Dourado, Andre H. B.
Parreira, Luanna S.
de Oliveira, Daniela C.
Camargo, Pedro H. C.
Cordoba de Torresi, I, Susana
Total Authors: 10
 I, Univ Sao Paulo, Dept Quim Fundamental, Inst Quim, Av Prof Lineu Prestes 748, BR-05508000 Sao Paulo, SP - Brazil
 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
 Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 - USA
 Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 - USA
 Ctr Nacl Pesquisa Energia & Mat, Lab Nacl Luz Sincrotron, BR-13083970 Campinas, SP - Brazil
 Univ Helsinki, Dept Chem, AI Virtasen Aukio 1, Helsinki 00014 - Finland
Total Affiliations: 6
APPLIED CATALYSIS B-ENVIRONMENTAL;
NOV 15 2020.
Web of Science Citations:
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)