Identification of Highly Active Fe Sites in (Ni,Fe)OOH for Electrocatalytic Water Splitting
Lawrence Berkeley National Laboratory · Interface (United States) · +6 more institutions
Abstract
Highly active catalysts for the oxygen evolution reaction (OER) are required for the development of photoelectrochemical devices that generate hydrogen efficiently from water using solar energy. Here, we identify the origin of a 500-fold OER activity enhancement that can be achieved with mixed (Ni,Fe)oxyhydroxides (Ni1–xFexOOH) over their pure Ni and Fe parent compounds, resulting in one of the most active currently known OER catalysts in alkaline electrolyte. Operando X-ray absorption spectroscopy (XAS) using high energy resolution fluorescence detection (HERFD) reveals that Fe3+ in Ni1–xFexOOH occupies octahedral sites with unusually short Fe–O bond distances, induced by edge-sharing with surrounding [NiO6]…
Citation impact
- FWCI
- 65.66
- Percentile
- 100%
- References
- 71
Authors
15- DFDaniel FriebelCorresponding
Lawrence Berkeley National Laboratory, Interface (United States), Joint Center for Artificial Photosynthesis, SLAC National Accelerator Laboratory
- MWMary W. Louie
Lawrence Berkeley National Laboratory, University of California, Berkeley, Joint Center for Artificial Photosynthesis
- MBMichal Bajdich
Interface (United States), SLAC National Accelerator Laboratory
- KEKai E. Sanwald
Technical University of Munich, Interface (United States), SLAC National Accelerator Laboratory
- YCYun Cai
Lawrence Berkeley National Laboratory, Joint Center for Artificial Photosynthesis, University of California, Berkeley
Topics & keywords
- Chemistry
- Oxygen evolution
- X-ray absorption spectroscopy
- Water splitting
- Active site
- Catalysis
- Octahedron
- Inorganic chemistry
- Affordable and clean energy
Funding
- UDU.S. Department of EnergyAwards: -AC02-05CH11231, 05CH11231, DE-SC0004993, AC02-05CH11231, DE-AC02, DE-AC02-05CH11231, SC0004993, DE-AC02-
- UOUniversity of California
- NENational Energy Research Scientific Computing CenterAwards: 05CH11231, AC02-05CH11231
- OOOffice of ScienceAwards: DE-SC0004993, AC02-05CH11231, -AC02-05CH11231, DE-AC02
- BEBasic Energy SciencesAwards: DE-AC02, DE-SC0004993, AC02-05CH11231, DE-AC02-05CH11231, -AC02-05CH11231