Insights into the electronic origin of enhancing the catalytic activity of Co3O4 for oxygen evolution by single atom ruthenium
- Dalian Univ. of Technology (China). Liaoning Key Lab for Energy Materials and Chemical Engineering, School of Chemical Engineering, State Key Lab of Fine Chemicals, School of Chemical Engineering; Univ. of Western Ontario, London, ON (Canada). Dept. of Mechanical and Materials Engineering
- Tsinghua Univ., Beijing (China). Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Dept. of Chemistry
- Dalian Univ. of Technology (China). Liaoning Key Lab for Energy Materials and Chemical Engineering, School of Chemical Engineering, State Key Lab of Fine Chemicals, School of Chemical Engineering
- Univ. of Western Ontario, London, ON (Canada). Dept. of Mechanical and Materials Engineering
- SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
- Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics. Beijing National Lab. for Condensed Matter Physics (BNLCP-CAS)
- Dalian Univ. of Technology (China). Liaoning Key Lab for Energy Materials and Chemical Engineering, School of Chemical Engineering, State Key Lab of Fine Chemicals, School of Chemical Engineering; Chinese Academy of Sciences, Beijing (China). Beijing Univ. of Science and Technology, College of Chemical Engineering
The surface electronic structure of transition-metal oxide catalysts plays a decisive role in binding the intermediates of the oxygen evolution reaction (OER) to the oxide surface, in turn influencing the catalytic activity of these materials. However, the approaches to modulating the electronic structure of surface metal ions are rare and far behind the demands. Here, we report a surface single atom decoration for adjusting the surface electronic structure of Co3O4, leading to enhanced electrocatalytic activity for OER, in which the isolated Ru single atoms were uniformly deposited on the surface of Co3O4 by an atomic layer deposition technology. As the OER catalyst, the as-made catalysts have exhibited a significantly enhanced catalytic activity (with increasing to 95.5 times) and a dramatically decreased overpotential. The density functional theory calculations reveal that the single-atom Ru acts as a promotor to adjust the 3d electronic structure of adjacent Co atoms and to tune the binding energy between intermediates and activity sites, finally leading to enhanced catalytic activity.
- Research Organization:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-76SF00515
- OSTI ID:
- 1782093
- Journal Information:
- Nano Today, Journal Name: Nano Today Vol. 34; ISSN 1748-0132
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English