Details

Autor(en) / Beteiligte

• Zhu, Cheng
• Qi, Zhen
• Beck, Victor A
• Luneau, Mathilde
• Lattimer, Judith
• Chen, Wen
• Worsley, Marcus A
• Ye, Jianchao
• Duoss, Eric B
• Spadaccini, Christopher M
• Friend, Cynthia M
• Biener, Juergen

Titel

Toward digitally controlled catalyst architectures: Hierarchical nanoporous gold via 3D printing

Ist Teil von

• Science advances, 2018-08, Vol.4 (8), p.eaas9459-eaas9459

Ort / Verlag

United States: AAAS

Erscheinungsjahr

2018

Link zum Volltext

Quelle

EZB-FREE-00999 freely available EZB journals

Beschreibungen/Notizen

• Monolithic nanoporous metals, derived from dealloying, have a unique bicontinuous solid/void structure that provides both large surface area and high electrical conductivity, making them ideal candidates for various energy applications. However, many of these applications would greatly benefit from the integration of an engineered hierarchical macroporous network structure that increases and directs mass transport. We report on 3D (three-dimensional)-printed hierarchical nanoporous gold (3DP-hnp-Au) with engineered nonrandom macroarchitectures by combining 3D printing and dealloying. The material exhibits three distinct structural length scales ranging from the digitally controlled macroporous network structure (10 to 1000 μm) to the nanoscale pore/ligament morphology (30 to 500 nm) controlled by dealloying. Supercapacitance, pressure drop, and catalysis measurements reveal that the 3D hierarchical nature of our printed nanoporous metals markedly improves mass transport and reaction rates for both liquids and gases. Our approach can be applied to a variety of alloy systems and has the potential to revolutionize the design of (electro-)chemical plants by changing the scaling relations between volume and catalyst surface area.