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Gold–rhodium nanoflowers for the plasmon-enhanced hydrogen evolution reaction under visible light

DOI: 10.1021/acscatal.1c02938 DOI Help

Authors: Maria Paula De Souza Rodrigues (Universidade de São Paulo) , André H. B. Dourado (Technische Universität München) , Leonardo De O. Cutolo (Universidade de São Paulo) , Luanna S. Parreira (Universidade de São Paulo) , Tiago Vinicius Alves (Universidade Federal da Bahia) , Thomas J. A. Slater (Diamond Light Source) , Sarah Haigh (University of Manchester) , Pedro H. C. Camargo (University of Helsinki) , Susana Inés Cordoba De Torresi (Universidade de São Paulo)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Acs Catalysis

State: Published (Approved)
Published: October 2021
Diamond Proposal Number(s): 26559

Open Access Open Access

Abstract: 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.

Journal Keywords: gold; rhodium; nanoflowers; plasmonic catalysis; hydrogen evolution reaction

Subject Areas: Chemistry, Materials

Diamond Offline Facilities: Electron Physical Sciences Imaging Centre (ePSIC)
Instruments: E01-JEM ARM 200CF

Added On: 27/10/2021 08:37


Discipline Tags:

Catalysis Physical Chemistry Materials Science Nanoscience/Nanotechnology Chemistry

Technical Tags:

Microscopy Electron Microscopy (EM) Transmission Electron Microscopy (TEM)