Journal
ACS ENERGY LETTERS
Volume 3, Issue 6, Pages 1254-1260Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.8b00621
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Funding
- WPI-MANA, Ministry of Education, Culture, Sports, Science and Technology, Japan
- National Natural Science Foundation of China [51372279]
- Hunan Provincial Natural Science Foundation of China [13JJ1005]
- Shenghua Scholar Program of Central South University
- JSPS [15H03534, 15K13296]
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Coordinatively asymmetric or unsaturated metal centers may serve as accessible active sites and allow strong interaction with incoming guests in catalysis, sensing, and separation applications. Herein, a peculiar Co-based phosphate NaCo4(PO4)(3), in which all Co atoms were in very rare 5-coordinations, was first synthesized in nanoribbon morphology. With the combined merits of the unique Co coordination, intrinsic half-metallicity, and nano structured morphology, NaCco(4)(PO4)(3) nanoribbons were characterized with high efficiency for water oxidation in a neutral electrolyte, remarkably outperforming congeneric phosphates such as Na2CoP2O7 with 4-coordinated Co configurations and even comparable to the benchmark RuO2 nanoparticles. The high catalytic performance validates a great potential in exploiting inorganic nanostructures with coordinatively asymmetric or unsaturated metal centers for energy storage and conversion applications.
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