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Title: Nanovoid Incorporated IrxCu Metallic Aerogels for Oxygen Evolution Reaction Catalysis

Abstract

Ir-based nanomaterials are regarded as state-of-the-art cathode electrocatalysts in proton exchange membrane water electrolyzers (PEMWEs). Engineering the morphology of Ir-based three-dimensional architectures as electrocatalysts toward oxygen evolution reaction (OER) has been rarely studied. Here, we report the gelation of IrxCu metallic hydrogels self-assembled with ultrafine and nanovoid incorporated building blocks for enhancing the electrocatalytic performance toward OER. The composition-optimized Ir3Cu metallic aerogels exhibited improved catalytic activity and durability toward OER. The mesosized voids generated through the in situ galvanic replacement reaction and the macrosized porous systems make a great contribution to the increased number of active sites. First-principle calculations revealed the intrinsic optimized binding energy of Ir by alloying with Cu. The best catalytic performance necessities a balance of the adsorption and desorption energy. The well-defined morphology and enhanced OER electrochemical performances of nanovoid incorporated IrxCu metallic aerogels hold great promise in further applications in PEMWEs.

Authors:
 [1];  [2];  [2];  [3];  [3]; ORCiD logo [4];  [5];  [6];  [7];  [2];  [1]; ORCiD logo [1]
  1. WASHINGTON STATE UNIV
  2. Washington State University
  3. Brookhaven National Laboratory
  4. BATTELLE (PACIFIC NW LAB)
  5. Shandong Normal University
  6. Tsinghua University
  7. UNIVERSITY OF WASHINGTON
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1591786
Report Number(s):
PNNL-SA-138184
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
ACS Energy Letters
Additional Journal Information:
Journal Volume: 3; Journal Issue: 9
Country of Publication:
United States
Language:
English

Citation Formats

Shi, Qiurong, Zhu, Chengzhou, Zhong, Hong, Su, Dong, Na, Li, Engelhard, Mark H., Xia, Haibing, Zhang, Qiang, Feng, Shuo, Beckman, Scott P., Du, Dan, and Lin, Yuehe. Nanovoid Incorporated IrxCu Metallic Aerogels for Oxygen Evolution Reaction Catalysis. United States: N. p., 2018. Web. doi:10.1021/acsenergylett.8b01338.
Shi, Qiurong, Zhu, Chengzhou, Zhong, Hong, Su, Dong, Na, Li, Engelhard, Mark H., Xia, Haibing, Zhang, Qiang, Feng, Shuo, Beckman, Scott P., Du, Dan, & Lin, Yuehe. Nanovoid Incorporated IrxCu Metallic Aerogels for Oxygen Evolution Reaction Catalysis. United States. doi:10.1021/acsenergylett.8b01338.
Shi, Qiurong, Zhu, Chengzhou, Zhong, Hong, Su, Dong, Na, Li, Engelhard, Mark H., Xia, Haibing, Zhang, Qiang, Feng, Shuo, Beckman, Scott P., Du, Dan, and Lin, Yuehe. Fri . "Nanovoid Incorporated IrxCu Metallic Aerogels for Oxygen Evolution Reaction Catalysis". United States. doi:10.1021/acsenergylett.8b01338.
@article{osti_1591786,
title = {Nanovoid Incorporated IrxCu Metallic Aerogels for Oxygen Evolution Reaction Catalysis},
author = {Shi, Qiurong and Zhu, Chengzhou and Zhong, Hong and Su, Dong and Na, Li and Engelhard, Mark H. and Xia, Haibing and Zhang, Qiang and Feng, Shuo and Beckman, Scott P. and Du, Dan and Lin, Yuehe},
abstractNote = {Ir-based nanomaterials are regarded as state-of-the-art cathode electrocatalysts in proton exchange membrane water electrolyzers (PEMWEs). Engineering the morphology of Ir-based three-dimensional architectures as electrocatalysts toward oxygen evolution reaction (OER) has been rarely studied. Here, we report the gelation of IrxCu metallic hydrogels self-assembled with ultrafine and nanovoid incorporated building blocks for enhancing the electrocatalytic performance toward OER. The composition-optimized Ir3Cu metallic aerogels exhibited improved catalytic activity and durability toward OER. The mesosized voids generated through the in situ galvanic replacement reaction and the macrosized porous systems make a great contribution to the increased number of active sites. First-principle calculations revealed the intrinsic optimized binding energy of Ir by alloying with Cu. The best catalytic performance necessities a balance of the adsorption and desorption energy. The well-defined morphology and enhanced OER electrochemical performances of nanovoid incorporated IrxCu metallic aerogels hold great promise in further applications in PEMWEs.},
doi = {10.1021/acsenergylett.8b01338},
journal = {ACS Energy Letters},
number = 9,
volume = 3,
place = {United States},
year = {2018},
month = {9}
}

Works referencing / citing this record:

Design of Multi‐Metallic‐Based Electrocatalysts for Enhanced Water Oxidation
journal, May 2019