Abstract
Silver electrocatalysts offer the possibility to produce CO by converting CO2, enabling the use of a greenhouse gas as chemical building block. Compared to nanoparticles, silver nanowires show an enhanced selectivity towards CO. Recent publications proved that oxide-derived electrocatalysts can exhibit better catalytic performance than the pristine metal phase, but oxide-derived silver nanowires have not been investigated. In this work, we report for the first time the electrocatalytic properties of silver nanowires, synthesized via the polyol method, and pretreated by electrochemical oxidation in basic electrolyte. By increasing the oxidation potential, both the percentage of AgxO and the surface roughness of the catalyst were progressively increased. The most oxidized sample showed a remarkably improved CO selectivity (−294.2 mA m−2Ag), producing a 3.3-fold larger CO partial current density than the pristine sample (−89.4 mA m−2Ag), normalized by electrochemically active silver surface area. This work demonstrates the beneficial effect of the controlled oxidation treatment even on highly selective nanostructures such as silver nanowires.
Original language | English |
---|---|
Article number | e202300792 |
Number of pages | 11 |
Journal | ChemCatChem |
Volume | 15 |
Issue number | 22 |
DOIs | |
Publication status | Published - 22 Nov 2023 |
Bibliographical note
Publisher Copyright:© 2023 The Authors. ChemCatChem published by Wiley-VCH GmbH.
Funding
Francesco Mattarozzi, Claudia Keijzer and Rim van de Poll were funded by the Dutch Research Council (NWO), via the Advanced Research Center Chemical Building Blocks Consortium (ARC‐CBBC) in collaboration with Shell Global Solutions International B. V. Stephan Jonker is acknowledged for the precious help with the atomic absorption spectroscopy measurements. Matteo Parente is acknowledged for the fruitful discussions regarding the synthesis of the pristine silver nanowires. Valerio Gulino acknowledges funding from RELEASE (project number: 17621). Nienke Visser is acknowledged for the TEM images of the pristine nanowires. Matt Peerlings and Maaike van Ittersum are acknowledged for the useful discussions related to the electrochemical results. Jan Willem de Rijk is acknowledged for the technical support, helping both with the cell design and the preparation of the catalytic set‐up during this project
Funders | Funder number |
---|---|
Nederlandse Organisatie voor Wetenschappelijk Onderzoek |
Keywords
- charge transfer resistance
- CO production
- CO reduction
- oxide-derived metal
- silver nanowires