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A Highly Active Star Decahedron Cu Nanocatalyst for Hydrocarbon Production at Low Overpotentials

Choi, Chungseok and Cheng, Tao and Flores Espinosa, Michelle and Fei, Huilong and Duan, Xiangfeng and Goddard, William A., III and Huang, Yu (2019) A Highly Active Star Decahedron Cu Nanocatalyst for Hydrocarbon Production at Low Overpotentials. Advanced Materials, 31 (6). Art. No. 1805405. ISSN 0935-9648. https://resolver.caltech.edu/CaltechAUTHORS:20181221-105357220

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Abstract

The electrochemical carbon dioxide reduction reaction (CO_2RR) presents a viable approach to recycle CO_2 gas into low carbon fuels. Thus, the development of highly active catalysts at low overpotential is desired for this reaction. Herein, a high‐yield synthesis of unique star decahedron Cu nanoparticles (SD‐Cu NPs) electrocatalysts, displaying twin boundaries (TBs) and multiple stacking faults, which lead to low overpotentials for methane (CH_4) and high efficiency for ethylene (C_2H_4) production, is reported. Particularly, SD‐Cu NPs show an onset potential for CH_4 production lower by 0.149 V than commercial Cu NPs. More impressively, SD‐Cu NPs demonstrate a faradaic efficiency of 52.43% ± 2.72% for C_2H_4 production at −0.993 ± 0.0129 V. The results demonstrate that the surface stacking faults and twin defects increase CO binding energy, leading to the enhanced CO_2RR performance on SD‐Cu NPs.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1002/adma.201805405DOIArticle
ORCID:
AuthorORCID
Choi, Chungseok0000-0001-9169-1393
Cheng, Tao0000-0003-4830-177X
Flores Espinosa, Michelle0000-0002-5697-1290
Fei, Huilong0000-0002-4216-5810
Duan, Xiangfeng0000-0002-4321-6288
Goddard, William A., III0000-0003-0097-5716
Huang, Yu0000-0003-1793-0741
Additional Information:© 2018 WILEY‐VCH. Received: August 18, 2018. Revised: November 16, 2018. Published online: December 14, 2018. Issue Online: 08 February 2019. TEM work was conducted using the facilities in the electron imaging center of at California NanoSystems Institute at the University of California Los Angles. C.C. and Y.H. acknowledge support by the Office of Naval Research (ONR) under grant number N000141712608. T.C. and W.A.G. were supported by Joint Center for Artificial Photosynthesis, a DOE Energy Innovation Hub, supported through the Office of Science of the U.S. Department of Energy under Award Number DE‐SC0004993. This work used the Extreme Science and Engineering Discovery Environment (XSEDE) which is supported by National Science Foundation grant number ACI‐1053575. The authors declare no conflict of interest.
Group:JCAP
Funders:
Funding AgencyGrant Number
Office of Naval Research (ONR)N000141712608
Department of Energy (DOE)DE‐SC0004993
NSFACI‐1053575
Subject Keywords:Cu nanoparticles, DFT, electrochemical CO_2 reduction, stacking faults, twin boundary
Other Numbering System:
Other Numbering System NameOther Numbering System ID
WAG1317
Issue or Number:6
Record Number:CaltechAUTHORS:20181221-105357220
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20181221-105357220
Official Citation:C. Choi, T. Cheng, M. Flores Espinosa, H. Fei, X. Duan, W. A. Goddard III, Y. Huang, Adv. Mater. 2019, 31, 1805405. https://doi.org/10.1002/adma.201805405
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:91956
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:21 Dec 2018 19:42
Last Modified:03 Oct 2019 20:39

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