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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.)

Why Could the Nature of Surface Facets Lead to Differences in the Activity and Stability of Cu2O-Based Electrocatalytic Sensors?

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Pastrian, Fabian A. C. [1] ; da Silva, Anderson G. M. [1] ; Dourado, Andre H. B. [1] ; de Lima Batista, Ana P. [1] ; de Oliveira-Fiho, Antonio G. S. [2] ; Quiroz, Jhon [1] ; de Oliveira, Daniela C. [3] ; Camargo, Pedro H. C. [1] ; Cordoba de Torresi, Susana I. [1]
Total Authors: 9
[1] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, Av Prof Lineu Prestes 748, BR-05508000 Sao Paulo, SP - Brazil
[2] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Quim, BR-14040901 Ribeirao Preto, SP - Brazil
[3] Ctr Nacl Pesquisa Energia & Mat, Lab Nacl Luz Sincrotron, Campinas, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: ACS CATALYSIS; v. 8, n. 7, p. 6265-6272, JUL 2018.
Web of Science Citations: 10

By a combination of theoretical and experimental design, we unraveled the effect of [111] and [100] surface facets on the electrocatalytic sensing activities and stabilities of metal oxides by employing Cu2O crystals as a model substrate and glucose as the analyte. We started by theoretically investigating the potential energy curves for the glucose interaction with the Cu2O [111] and [100] surface facets. We found that the glucose interaction energy was significantly higher for the [100] facets than for the [111] facets. Then, we experimentally observed that their electrocatalytic sensing performance displayed shape dependent behavior. While the catalytic activities followed the order cubes > cuboctahedrons > octahedrons, their stabilities showed the opposite trend. The higher catalytic activity enabled by the [100] facets is explained by their stronger interaction with glucose. On the other hand, the higher stability allowed by the [111] facets is justified by their lower concentration of oxygen vacancies and weaker interaction with O-2 relative to those of the [100] surface. (AU)

FAPESP's process: 15/22203-6 - N-Heterocyclic Carbene Based Compounds in CO2 Activation: A Computational Approach
Grantee:Ana Paula de Lima Batista
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 15/11714-0 - Reactivity, transformation, fixation, and spectroscopy of systems involving CO2
Grantee:Antonio Gustavo Sampaio de Oliveira Filho
Support Opportunities: Regular Research Grants
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