Journal
CHEMICAL COMMUNICATIONS
Volume 55, Issue 12, Pages 1797-1800Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8cc10229e
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Funding
- Qingdao Innovation Leading Talent Program
- Natural Science Foundation of China [51173087]
- China Postdoctoral Science Foundation [2018M630753]
- Natural Science Foundation of Shandong Province [ZR2018BEM006]
- Qingdao Postdoctoral Application Research Project
- Taishan Scholars Program
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Amorphous transition-metal (hydr) oxides have proven to be the most promising oxygen evolution reaction (OER) electrocatalysts. Here, a facile and novel strategy for the generation of porous amorphous cobalt oxide through one-step treatment of the cobalt carbonate hydroxide precursor with concentrated sulfuric acid has been reported. Benefiting from the optimized amorphous structure, the prepared catalyst exhibits an excellent water-oxidation activity in an alkaline electrolyte with the demand of 50 mV less overpotential at 10 mA cm(-2) compared to that of highly-crystallized Co3O4. Compared with the 400 degrees C annealing process for Co3O4, the ultrafast acid treatment process within 10 seconds at room-temperature for achieving such amorphous cobalt oxide demonstrates tremendous convenience. More impressively, after continuous testing for 60 h at an overpotential of 370 mV, it still maintains a porous configuration as well as similar to 92% of the original current density. Our findings not only present a high-efficiency OER electrocatalyst, but also provide a methodology with broad applicability toward the systematic study of other non-crystal oxides for green energy applications.
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