Nanovoid Incorporated IrxCu Metallic Aerogels for Oxygen Evolution Reaction Catalysis
- Washington State Univ., Pullman, WA (United States). School of Mechanical and Materials Engineering
- Washington State Univ., Pullman, WA (United States). School of Mechanical and Materials Engineering; Central China Normal University, Wuhan (China). Key Laboratory of Pesticide and Chemical Biology, Ministry of Education of the PR China and College of Chemistry
- Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
- Shandong Univ., Jinan (China). Key Institute of Crystal Materials
- Washington State Univ., Pullman, WA (United States). Department of Chemistry
Ir-based nanomaterials are regarded as the 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 in this paper, we reported the gelation of IrxCu metallic hydrogels self-assembled with ultra-fine and nanovoids 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 meso-sized voids generated through the in situ galvanic replacement reaction and the macro-sized 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 the balance of the adsorption and desorption energy. Lastly, the well-defined morphology and enhanced OER electrochemical performances of nanovoid incorporated IrxCu metallic aerogels hold a great promise in further application in PEMWEs.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Biological and Environmental Research (BER)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1478480
- Report Number(s):
- BNL-209320-2018-JAAM
- Journal Information:
- ACS Energy Letters, Vol. 3, Issue 9; ISSN 2380-8195
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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