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

Autor(es)

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]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: ACS CATALYSIS; v. 11, n. 21, p. 13543-13555, NOV 5 2021.
• Citações Web of Science: 0

Resumo

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)

• Processo FAPESP: 18/16846-0 - Nanofios de óxidos metálicos decorados com nanopartículas de ouro para aplicações em catálise heterogênea
• Beneficiário: Maria Paula de Souza Rodrigues
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 15/26308-7 - Otimização das propriedades físico-químicas de materiais nano-estruturados e suas aplicações em reconhecimento molecular, catálise e conversão/armazenamento de energia
• Beneficiário: Roberto Manuel Torresi
• Modalidade de apoio: Auxílio à Pesquisa - Temático