期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 118, 期 30, 页码 17060-17066出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp5008347
关键词
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资金
- DOE [DE-SC0009565]
- NSF/NIH [DMR-0936384]
- U.S. Department of Energy (DOE) [DE-SC0009565] Funding Source: U.S. Department of Energy (DOE)
Nanoparticle (NP) cobalt-phosphate (Co-P-i) water oxidation catalysts are prepared as thin films by anodic electrodeposition from solutions of Co2+ dissolved in proton-accepting electrolytes. Compositional and structural insight into the nature of the catalyst film is provided from advanced spectroscopy. Infrared spectra demonstrate that counteranions incorporate into the Co-P-i thin films and that the phosphate ion, among various anion electrolytes, exhibits the highest binding affinity to the cobalt centers. Atomic force microscopy images show a highly porous morphology of the thin film that is composed of Co-P-i NPs. Whereas conventional X-ray powder diffraction technique shows catalyst films to be amorphous, synchrotron-based X-ray grazing incidence diffraction reveals well-defined diffraction patterns that are indicative of long-range ordering within the film. Azimuthal scans imply that as-prepared films possess a highly preferred orientation and texture on the electrode surface.
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