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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.)

Gold-Rhodium Nanoflowers for the Plasmon-Enhanced Hydrogen Evolution Reaction under Visible Light

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de Souza Rodrigues, Maria Paula [1] ; Dourado, Andre H. B. [2] ; Cutolo, Leonardo de O. [1] ; Parreira, Luanna S. [1] ; Alves, Tiago Vinicius [3] ; Slater, Thomas J. A. [4] ; Haigh, Sarah J. [5] ; Camargo, Pedro H. C. [6] ; Cordoba de Torresi, Susana Ines [1]
Total Authors: 9
[1] Univ Sao Paulo, Inst Quim, BR-05508080 Sao Paulo, SP - Brazil
[2] Tech Univ Munich, Dept Phys, Nonequilibrium Chem Phys, D-85748 Garching - Germany
[3] Univ Fed Bahia, Inst Quim, Dept Fisicoquim, BR-40170115 Salvador, BA - Brazil
[4] Diamond Light Source Ltd, Electron Phys Sci Imaging Ctr, Didcot OX11 0DE, Oxon - England
[5] Univ Manchester, Dept Mat, Manchester M13 9PL, Lancs - England
[6] Univ Helsinki, Dept Chem, Helsinki 00560 - Finland
Total Affiliations: 6
Document type: Journal article
Source: ACS CATALYSIS; v. 11, n. 21, p. 13543-13555, NOV 5 2021.
Web of Science Citations: 0

State of the art electrocatalysts for the hydrogen evolution reaction (HER) are based on metal nanoparticles (NPs). It has been shown that the localized surface plasmon resonance (LSPR) excitation in plasmonic NPs can be harvested to accelerate a variety of molecular transformations. This enables the utilization of visible light as an energy input to enhance HER performances. However, most metals that are active toward the HER do not support LSPR excitation in the visible or near-IR ranges. We describe herein the synthesis of gold-rhodium core-shell nanoflowers (Au@Rh NFs) that are composed of a core made up of spherical Au NPs and shells containing Rh branches. The Au@Rh NFs were employed as a model system to probe how the LSPR excitation from Au NPs can lead to an enhancement in the HER performance for Rh. Our data demonstrate that the LSPR excitation at 533 nm (and 405 nm) leads to an improvement in the HER performance of Rh, which depends on the morphological features of the Au Rh NFs, offering opportunities for optimization of the catalytic performance. Control experiments indicate that this improvement originates from the stronger interaction of Au@Rh NFs with H2O molecules at the surface, leading to an icelike configuration, which facilitated the HER under LSPR excitation. (AU)

FAPESP's process: 18/16846-0 - Metal oxide nanowires decorated with gold nanoparticles for heterogeneous catalysis application
Grantee:Maria Paula de Souza Rodrigues
Support type: Scholarships in Brazil - Doctorate (Direct)
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 type: Research Projects - Thematic Grants