An advantage combined strategy for preparing bi-functional electrocatalyst in rechargeable zinc-air batteries
文献类型:期刊论文
作者 | Wang, Y (Wang, Ying)[ 1,2,3 ]; Qiao, MF (Qiao, Mengfei)[ 1,2,3 ]; Mamat, X (Mamat, Xamxikamar)[ 1 ] |
刊名 | CHEMICAL ENGINEERING JOURNAL
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出版日期 | 2020 |
卷号 | 402期号:12页码:1-9 |
关键词 | Zinc-air batteries FeCo alloy nanoparticles Atomic FeN2 dispersion Ordered porous carbon Oxygen reduction reaction |
ISSN号 | 1385-8947 |
DOI | 10.1016/j.cej.2020.126214 |
英文摘要 | The development of rechargeable zinc-air batteries requires the rational construction and exploration of robust and cost-effective bi-functional cathode catalysts to replace common noble metal-based ones for efficient oxygen reduction/evolution reactions (ORR and OER). In this study, a new kind of hierarchically ordered porous carbon co-doped by FeCo alloy nanoparticles and FeN2 moiety was synthesized via a hard-templated molding and two-step pyrolysis strategies. Notably, rational modulation of FeCo and FeN2 endows maximal synergistic effect between the intrinsic activity of FeCo alloy nanoparticles and the atomically dispersed FeN2 moieties for OER and ORR, respectively. Furthermore, the ordered hierarchical porous structure carbon matrix possessing a large surface area can accelerate mass transfer, enlarge the contact area with electrolyte, and expose more active sites which buried deeply in the material. As a result, the obtained FeCo/FeN2/NHOPC exhibited remarkable bi-functional catalytic activity in terms of a more positive half-wave potential (0.86 V) compared with PVC (0.84 V) for ORR in alkaline medium, a low overpotential of 340 mV for OER in the same condition, and the reversible oxygen electrode index of 0.71 V. Moreover, when served as a cathode catalyst in a home-made rechargeable zinc-air battery, the material performs the superior reactive activity with a high energy density of 810.3 mWh g(zn)(-1) , a peak power density of 128.7 mW cm(-2) , and excellent stability over 120 cycles at 10 mA cm(-2) without apparent degradation. Importantly, the advantage combined strategy proposed in this work indicates an auspicious direction for synthesizing high-performance bi-functional catalysts. |
WOS记录号 | WOS:000573514500003 |
源URL | [http://ir.xjipc.cas.cn/handle/365002/7419] ![]() |
专题 | 新疆理化技术研究所_省部共建新疆特有药用资源利用重点实验室 |
作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Xiamen Univ, Coll Chem & Chem Engn, Collaborat Innovat Ctr Chem Energy Mat, Xiamen 361005, Peoples R China 3.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Key Lab Chem Plant Resources Arid Reg, State Key Lab Basis Xinjiang Indigenous Med Plant, Urumqi 830011, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Y ,Qiao, MF ,Mamat, X . An advantage combined strategy for preparing bi-functional electrocatalyst in rechargeable zinc-air batteries[J]. CHEMICAL ENGINEERING JOURNAL,2020,402(12):1-9. |
APA | Wang, Y ,Qiao, MF ,&Mamat, X .(2020).An advantage combined strategy for preparing bi-functional electrocatalyst in rechargeable zinc-air batteries.CHEMICAL ENGINEERING JOURNAL,402(12),1-9. |
MLA | Wang, Y ,et al."An advantage combined strategy for preparing bi-functional electrocatalyst in rechargeable zinc-air batteries".CHEMICAL ENGINEERING JOURNAL 402.12(2020):1-9. |
入库方式: OAI收割
来源:新疆理化技术研究所
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