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231225s2020 xx |||||o 00| ||eng c |
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|a 10.1002/adma.201905679
|2 doi
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|a pubmed25n1011.xml
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|a (DE-627)NLM303393386
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|a (NLM)31736168
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|a DE-627
|b ger
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|e rakwb
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|a eng
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|a Diao, Jinxiang
|e verfasserin
|4 aut
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|a Interfacial Engineering of W2 N/WC Heterostructures Derived from Solid-State Synthesis
|b A Highly Efficient Trifunctional Electrocatalyst for ORR, OER, and HER
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|c 2020
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 30.09.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a To meet the practical demand of overall water splitting and regenerative metal-air batteries, highly efficient, low-cost, and durable electrocatalysts for the oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) are required to displace noble metal catalysts. In this work, a facile solid-state synthesis strategy is developed to construct the interfacial engineering of W2 N/WC heterostructures, in which abundant interfaces are formed. Under high temperature (800 °C), volatile CNx species from dicyanodiamide are trapped by WO3 nanorods, followed by simultaneous nitridation and carbonization, to form W2 N/WC heterostructure catalysts. The resultant W2 N/WC heterostructure catalysts exhibit an efficient and stable electrocatalytic performance toward the ORR, OER, and HER, including a half-wave potential of 0.81 V (ORR) and a low overpotential at 10 mA cm-2 for the OER (320 mV) and HER (148.5 mV). Furthermore, a W2 N/WC-based Zn-air battery shows outstanding high power density (172 mW cm-2 ). Density functional theory and X-ray absorption fine structure analysis computations reveal that W2 N/WC interfaces synergistically facilitate transport and separation of charge, thus accelerating the electrochemical ORR, OER, and HER. This work paves a novel avenue for constructing efficient and low-cost electrocatalysts for electrochemical energy devices
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|a Journal Article
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|a W2N/WC heterostructures
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|a Zn-air batteries
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|a density functional theory
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|a heterostructures
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| 650 |
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4 |
|a water splitting
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| 700 |
1 |
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|a Qiu, Yu
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Liu, Shuangquan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wang, Weitao
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Chen, Kai
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Li, Hailong
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yuan, Wenyu
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Qu, Yunteng
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Guo, Xiaohui
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 32(2020), 7 vom: 06. Feb., Seite e1905679
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnas
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| 773 |
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|g volume:32
|g year:2020
|g number:7
|g day:06
|g month:02
|g pages:e1905679
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|u http://dx.doi.org/10.1002/adma.201905679
|3 Volltext
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