期刊
CHEMISTRY OF MATERIALS
卷 29, 期 1, 页码 120-140出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.6b02796
关键词
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资金
- National Science Foundation Chemical Catalysis program [CHE-1566348]
- United States Air Force
- United States Air Force Academy faculty pipeline program
- W. M. Keck Foundation
- M. J. Murdock Charitable Trust
- ONAMI
- Air Force Research Laboratory [FA8650-05-1-5041]
- National Science Foundation [0923577, 0421086]
- W. M. Keck Collaboratory for Plasma Spectrometry at Oregon State University
- University of Oregon
- Sloan Foundation
- Dreyfus Foundation
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0421086] Funding Source: National Science Foundation
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1566348] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0923577] Funding Source: National Science Foundation
Heterogeneous electrocatalysts for the oxygen evolution reaction (OER) are complicated materials with dynamic structures. They can exhibit potential-induced phase transitions, potential-dependent electronic properties, variable oxidation and protonation states, and disordered local/surface phases. These properties make understanding the OER, and ultimately designing higher efficiency catalysts, challenging. We report a series of procedures and measurement techniques that we have adopted or developed to assess each of the above challenges in understanding materials for the OER. These include the targeted synthesis of hydrated oxyhydroxide phases, the assessment and elimination of electrolyte impurities, the use of a quartz crystal microbalance to monitor film loading and dissolution, and the use of an in situ conductivity measurement to understand the flow of electrons from the catalyst active sites to the conductive support electrode. We end with a recipe for the synthesis and characterization of a standard Ni(Fe)OxHy catalyst that can be performed in any laboratory with a basic electrochemical setup and used as a quantitative comparison to aid the development of new OER catalyst systems.
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