期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 10, 期 35, 页码 11577-11586出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.2c03250
关键词
layered double hydroxides; metal-organic frameworks; nanoflakes; high current densities; overall water splitting
资金
- National Natural Science Foundation of China [21808029]
- Dalian Youth Science and Technology Star Project Support Program [2020RQ126]
- State Key Laboratory of Fine Chemicals [KF1818]
- Liaoning Revitalization Talents Program [XLYC1907036]
- Advanced Research Center for Green Materials Science and Technology?
- Featured Area Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education [111 L9006]
- Ministry of Science and Technology in Taiwan [110-2112-M-213-006, 110-2634-F-002-043, 110-3116-F-002-002, 110-2221-E-002-024-MY3]
The 2D metal-organic framework-derived nanoflakes NiCo(nf)-P exhibit excellent electrocatalytic performance for hydrogen evolution reaction, oxygen evolution reaction, and overall water splitting, with low overpotentials and outstanding stability.
Two-dimensional (2D) metal-organic framework (MOF)-derived NiCoP nanoflakes, denoted as NiCo(nf)-P, are prepared via in situ growth of MOF using NiCo layered double hydroxide (LDH) as a sacrificial template, followed by phosphorization. The nanoparticle-decorated 2D nanoflake morphology and the intrinsic porosity inherited from the MOF precursor render NiCo(nf)-P a highly efficient bifunctional electrocatalyst toward hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and overall water splitting. In 1.0 M KOH electrolyte solution, NiCo(nf)-P shows low overpotentials of 199/283/317 and 315/378/416 mV at 100/500/1000 mA cm-2 for HER and OER, respectively. For overall water splitting, it only needs low cell voltages of 1.74/1.86/1.94 V to reach 100/500/1000 mA cm-2, with outstanding long-term stability over 30 h. The excellent catalytic performance of NiCo(nf)-P outperforms most of the NiCoPbased electrocatalysts reported so far, indicating its great potential for the overall water splitting application.
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