期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 6, 期 47, 页码 24277-24284出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta08577c
关键词
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资金
- National Natural Science Foundation of China [21675127]
- Shaanxi Provincial Science Fund for Distinguished Young Scholars [2018JC-011]
Zeolitic imidazolate frameworks (ZIFs) have been widely utilized as templates to construct hollow or porous nanostructures with superior catalytic properties for various electrocatalytic reactions. In this work, we reported that a leaf-like cobalt phosphide nanoarray topology assembled on carbon cloth (CoP NS/CC) built through annealing followed by phosphorization of the template precursor of the ZIF-L-Co nanosheet array on CC could serve as an efficient versatile catalyst for water electrolysis. This CoP NS/CC exhibits satisfactory HER, OER and full water-splitting efficiencies, with overpotentials of 90 mV and 310 mV and a voltage of 1.67 V needed to afford a current density of 10 mA cm(-2), respectively. Also, this electrode shows an excellent and stable HER performance in 0.5 M H2SO4 with a low overpotential of 88.7 mV required to attain a current density of 10 mA cm(-2). In this regard, a novel acid|base hybrid overall water-splitting electrolyzer with this CoP NS/CC serving as both the anode and cathode was further built, wherein cell voltages of just 0.735 (onset voltage) and 0.9 V were needed to afford overall current densities of 1 and 10 mA cm(-2), respectively.
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