Title |
A tailored double perovskite nanofiber catalyst enables ultrafast oxygen evolution
|
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Published in |
Nature Communications, February 2017
|
DOI | 10.1038/ncomms14586 |
Pubmed ID | |
Authors |
Bote Zhao, Lei Zhang, Dongxing Zhen, Seonyoung Yoo, Yong Ding, Dongchang Chen, Yu Chen, Qiaobao Zhang, Brian Doyle, Xunhui Xiong, Meilin Liu |
Abstract |
Rechargeable metal-air batteries and water splitting are highly competitive options for a sustainable energy future, but their commercialization is hindered by the absence of cost-effective, highly efficient and stable catalysts for the oxygen evolution reaction. Here we report the rational design and synthesis of a double perovskite PrBa0.5Sr0.5Co1.5Fe0.5O5+δ nanofiber as a highly efficient and robust catalyst for the oxygen evolution reaction. Co-doping of strontium and iron into PrBaCo2O5+δ is found to be very effective in enhancing intrinsic activity (normalized by the geometrical surface area, ∼4.7 times), as validated by electrochemical measurements and first-principles calculations. Further, the nanofiber morphology enhances its mass activity remarkably (by ∼20 times) as the diameter is reduced to ∼20 nm, attributed to the increased surface area and an unexpected intrinsic activity enhancement due possibly to a favourable eg electron filling associated with partial surface reduction, as unravelled from chemical titration and electron energy-loss spectroscopy. |
X Demographics
Geographical breakdown
Country | Count | As % |
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Unknown | 1 | 100% |
Demographic breakdown
Type | Count | As % |
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Science communicators (journalists, bloggers, editors) | 1 | 100% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
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United States | 1 | <1% |
Unknown | 223 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
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Student > Ph. D. Student | 48 | 21% |
Researcher | 31 | 14% |
Student > Master | 26 | 12% |
Student > Bachelor | 18 | 8% |
Student > Doctoral Student | 15 | 7% |
Other | 29 | 13% |
Unknown | 57 | 25% |
Readers by discipline | Count | As % |
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Materials Science | 50 | 22% |
Chemistry | 40 | 18% |
Chemical Engineering | 12 | 5% |
Engineering | 10 | 4% |
Energy | 9 | 4% |
Other | 24 | 11% |
Unknown | 79 | 35% |