It is critical for lowering energy consumption to develop highly efficient and stable non-precious metal bifunctional catalyst. In this study, we found that rational design of novel nanostructures is able...
Functionalized designs such as doping can effectively reduce charge transfer impedance and accelerate charge transfer dynamics. In this study, we reported a facile method to synthesize Ag-doped ZIF-67 hollow nanoboxes (Ag-CoP HNBs) by introducing Ag into cobalt-centered zeolitic imidazolate framework (ZIF-67). Its unique hollow structure results in higher stability, more active sites and bigger specific surface area with excellent HER and OER performance. Specifically, Ag-CoP HNBs requires only 97 and 256 mV to achieve a current density of 10 mA cm À 2 for HER and OER in 1.0 M KOH, respectively. Meanwhile, merely a voltage of 1.53 V is needed for delivering a current density of 10 mA cm À 2 for overall water splitting. Moreover, Ag-CoP HNBs exhibits excellent antibacterial activity for different bacteria due to the presence of Ag. In conclusion, this study provided a facile, feasible and productive way for developing Ag contained bifunctional electrocatalysts with antibacterial activity, which might have potential use in seawater splitting.
Exploring efficient and low-cost multifunctional electrocatalysts is a prerequisite for the development of energy storage and converting technology. In this work, NiO/Co2P nanosheets (NiO/Co2P NSs) with heterogeneous structure were investigated through hydrothermal method, annealing, and phosphating processes. Considering the synergistic effect between NiO and Co2P, we demonstrated the excellent electrocatalytic properties of NiO/Co2P NSs for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). By optimizing the electronic structure of NiO and Co2P, as well as the high specific surface area of the nanosheet structure and the presence of a large number of mesopores, more active sites are exposed and the electrocatalytic efficiency is improved, thus providing excellent electrocatalytic performance. Specifically, NiO/Co2P NSs can reach 108 and 207 mV at the current density of 10 mA cm−2 in alkaline medium for HER and OER. And it requires a voltage of 1.57 V to reach a current density of 10 mA cm-2 for overall water splitting. In conclusion, this study demonstrates the critical contribution of heterogeneous structures to promote electrocatalytic properties and open new perspectives for designing multifunctional catalysts.
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