Ultrahigh Oxygen Evolution Reaction Activity Achieved Using Ir Single Atoms on Amorphous CoOx Nanosheets
- Southern University of Science and Technology, Shenzhen, Guangdong (China); Univ. of Electronic Science and Technology of China, Chengdu (China)
- Oregon State Univ., Corvallis, OR (United States)
- Southern University of Science and Technology, Shenzhen, Guangdong (China)
- Univ. of Electronic Science and Technology of China, Chengdu (China)
- Argonne National Lab. (ANL), Argonne, IL (United States)
Developing efficient electrocatalysts for an oxygen evolution reaction (OER) is important for renewable energy storage. Here, we design high-density Ir single-atom catalysts supported by CoOx amorphous nanosheets (ANSs) for the OER. Experimental results show that Ir single atoms are anchored by abundant surface-absorbed O in CoOx ANSs. Ir single-atom catalysts possess ultrahigh mass activity that is 160-fold of commercial IrO2. The OER of IrCoOx ANSs reached a record low onset overpotential of less than 30 mV. In situ X-ray absorption spectroscopy reveals that Ir-O-Co pairs directly boosted the OER efficiency and enhanced the Ir stability.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE; National Natural Science Foundation of China (NSFC); Oregon State Univ., Corvallis, OR (United States)
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1777190
- Journal Information:
- ACS Catalysis, Vol. 11, Issue 1; ISSN 2155-5435
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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