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

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

doi:10.1126/sciadv.aas9459

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

Journal Article · Fri Aug 31 00:00:00 EDT 2018 · Science Advances

DOI:https://doi.org/10.1126/sciadv.aas9459· OSTI ID:2572379

^[1]; ^[1]; ^[1]; Luneau, Mathilde ^[2]; Lattimer, Judith ^[2]; Chen, Wen ^[1]; ^[1]; Ye, Jianchao ^[1]; Duoss, Eric B. ^[1]; ^[1]; Friend, Cynthia M. ^[2]; ^[1]

Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Harvard University, Cambridge, MA (United States)

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.

View Accepted Manuscript (DOE)

Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Integrated Mesoscale Architectures for Sustainable Catalysis (IMASC); Harvard Univ., Cambridge, MA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC52-07NA27344; SC0012573

OSTI ID:: 2572379

Alternate ID(s):: OSTI ID: 1515346

Report Number(s):: LLNL--JRNL-737039; LLNL--JRNL-772599

Journal Information:: Science Advances, Journal Name: Science Advances Journal Issue: 8 Vol. 4; ISSN 2375-2548

Publisher:: AAASCopyright Statement

Country of Publication:: United States

Language:: English

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