Abstract
3D dealloyed nanoporous metals have emerged as a new class of catalysts for various chemical and electrochemical reactions. Similar to other heterogeneous catalysts, the surface atomic structure of the nanoporous metal catalysts plays a crucial role in catalytic activity and selectivity. Through surfactant-assisted bottom-up synthesis, the surface-structure modification has been successfully realized in low-dimensional particulate catalysts. However, the surface modification by top-down dealloying has not been well explored for nanoporous metal catalysts. Here, a surfactant-free approach to tailor the surface structure of nanoporous gold by surface relaxation via electrochemical redox cycling is reported. By controlling the scan rates, nanoporous gold with abundant {111} facets or {100} facets can be designed and fabricated with dramatically improved electrocatalysis toward the ethanol oxidation reaction.
| Original language | English |
|---|---|
| Article number | 1703601 |
| Journal | Advanced Materials |
| Volume | 29 |
| Issue number | 41 |
| DOIs | |
| Publication status | Published - 2017 Nov 6 |
| Externally published | Yes |
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Keywords
- electrocatalysis
- nanoporous gold
- surface engineering
- surface structure
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
Cite this
Tuning Surface Structure of 3D Nanoporous Gold by Surfactant-Free Electrochemical Potential Cycling. / Wang, Zhili; Ning, Shoucong; Liu, Pan; Ding, Yi; Hirata, Akihiko; Fujita, Takeshi; Chen, Mingwei.
In: Advanced Materials, Vol. 29, No. 41, 1703601, 06.11.2017.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Tuning Surface Structure of 3D Nanoporous Gold by Surfactant-Free Electrochemical Potential Cycling
AU - Wang, Zhili
AU - Ning, Shoucong
AU - Liu, Pan
AU - Ding, Yi
AU - Hirata, Akihiko
AU - Fujita, Takeshi
AU - Chen, Mingwei
PY - 2017/11/6
Y1 - 2017/11/6
N2 - 3D dealloyed nanoporous metals have emerged as a new class of catalysts for various chemical and electrochemical reactions. Similar to other heterogeneous catalysts, the surface atomic structure of the nanoporous metal catalysts plays a crucial role in catalytic activity and selectivity. Through surfactant-assisted bottom-up synthesis, the surface-structure modification has been successfully realized in low-dimensional particulate catalysts. However, the surface modification by top-down dealloying has not been well explored for nanoporous metal catalysts. Here, a surfactant-free approach to tailor the surface structure of nanoporous gold by surface relaxation via electrochemical redox cycling is reported. By controlling the scan rates, nanoporous gold with abundant {111} facets or {100} facets can be designed and fabricated with dramatically improved electrocatalysis toward the ethanol oxidation reaction.
AB - 3D dealloyed nanoporous metals have emerged as a new class of catalysts for various chemical and electrochemical reactions. Similar to other heterogeneous catalysts, the surface atomic structure of the nanoporous metal catalysts plays a crucial role in catalytic activity and selectivity. Through surfactant-assisted bottom-up synthesis, the surface-structure modification has been successfully realized in low-dimensional particulate catalysts. However, the surface modification by top-down dealloying has not been well explored for nanoporous metal catalysts. Here, a surfactant-free approach to tailor the surface structure of nanoporous gold by surface relaxation via electrochemical redox cycling is reported. By controlling the scan rates, nanoporous gold with abundant {111} facets or {100} facets can be designed and fabricated with dramatically improved electrocatalysis toward the ethanol oxidation reaction.
KW - electrocatalysis
KW - nanoporous gold
KW - surface engineering
KW - surface structure
UR - http://www.scopus.com/inward/record.url?scp=85029425010&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85029425010&partnerID=8YFLogxK
U2 - 10.1002/adma.201703601
DO - 10.1002/adma.201703601
M3 - Article
AN - SCOPUS:85029425010
VL - 29
JO - Advanced Materials
JF - Advanced Materials
SN - 0935-9648
IS - 41
M1 - 1703601
ER -