期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 48, 页码 45080-45086出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b14995
关键词
mixed-metal-cluster; oxygen evolution reaction; PCN-Fe2Co-Fe2Ni; metal sites; metal-organic frameworks
资金
- NSFC [21676066]
- Special Fund for Scientific and Technological Innovation Talents of Harbin Science and Technology Bureau [2017RAQXJ057]
- Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University), Ministry of Education Open Project Fund [FIM2017012]
Rational construction of mixed metal-organic frameworks (MOFs) has been proved to be an effective way to heighten the electrocatalytic performance for MOFs, while the function of mixed metal clusters in MOFs to the electrocatalytic activity has not been known. For the first time, we present a mixed-metal-cluster strategy to boost electrocatalytic oxygen evolution reaction (OER) performance for MOFs. Heterometal clusters (Fe2M(mu 3-O) (CH3COO)(6)(H2O)(3), denoted as Fe2M (M: Co or Ni)), were chosen as the metal source to construct two bimetal PCN-250-Fe2M. Then, we further mixed Fe2Co and Fe2Ni clusters to construct mixed-metal-cluster PCN-Fe2Co-Fe2Ni by the in situ solvothermal reaction. Consequently, the OER activity of PCN-Fe2Co-Fe2Ni shows a dramatic enhancement compared with that of the parent bimetal MOFs. The PCN-Fe2Co-Fe-2 Ni displays a lower overpotential of 271 mV (eta(10)), small Tafel slope (67.7 mV dec(-1)), and good linear sweep voltammetry cycle stability for the OER. Combination of DFT calculation and experiment results show that the improved electrocatalytic activity of PCN-Fe2Co-Fe-2 Ni is ascribed to the increased electron density of Co and Ni active centers and electrochemically active areas.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据