Journal article
Nanovoid Incorporated IrxCu Metallic Aerogels for Oxygen Evolution Reaction Catalysis
ACS energy letters, Vol.3(9), pp.2038-2044
08/01/2018
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.
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Details
- Title
- Nanovoid Incorporated IrxCu Metallic Aerogels for Oxygen Evolution Reaction Catalysis
- Creators
- Qiurong Shi - Washington State UniversityChengzhou Zhu - Washington State UniversityHong Zhong - Washington State UniversityDong Su - Brookhaven National LaboratoryNa Li - Brookhaven National LaboratoryMark H. Engelhard - Pacific Northwest National LaboratoryHaibing Xia - Shandong UniversityQiang Zhang - Washington State UniversityShuo Peng - Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USAScott P. Beckman - Washington State UniversityDan Du - Washington State UniversityYuehe Lin - Washington State University
- Publication Details
- ACS energy letters, Vol.3(9), pp.2038-2044
- Academic Unit
- School of Mechanical and Materials Engineering
- Publisher
- Amer Chemical Soc
- Number of pages
- 13
- Grant note
- China Scholarship Council Washington State University Department of Energy's Office of Biological and Environmental Research located at Pacific Northwest National Laboratory DE-SC0012704 / U.S. Department of Energy, Office of Basic Energy Sciences; United States Department of Energy (DOE)
- Identifiers
- 99901227643901842
- Language
- English
- Resource Type
- Journal article