镍-磷-钛硅分子筛复合材料的制备与催化性能

Preparation and catalytic performance of nickel-phosphorus-titanium silicalite zeolite composite

以多级孔钛硅分子筛(HTS-1)为复合相、泡沫镍(NF)为基体,采用化学复合镀和原位处理工艺制备了镍-磷-钛硅分子筛(Ni-P-HTS-1/NF-T)复合材料,并对其电催化析氧反应(OER)性能进行研究。结果表明,Ni-P-HTS-1/NF-T复合材料在1 mol/L的KOH电解液中具有较快的OER动力学及电子转移速率,优异的OER性能及长期运行稳定性。HTS-1分子筛的掺杂及原位处理工艺降低了Ni-P-HTS-1/NF-T复合材料的电子转移电阻,增大其电催化活性表面积,此外还改变了复合材料的化学组成,生成了能为电催化析氧反应提供催化活性中心的镍的磷化物和氢氧化物,从而有效提升了Ni-P-HTS-1/NF-T复合材料的OER性能。

Nickel-phosphorus-titanium silicalite zeolite(Ni-P-HTS-1/NF-T)composite was prepared by electroless composite plating and in-situ treatment process with hierarchical titanium silicalite(HTS-1)zeolite as composite phase and nickel foam(NF)as matrix materials,and its electrocatalytic oxygen evolution reaction(OER)performance was studied.The results show that Ni-P-HTS-1/NF-T composite has faster OER kinetics and electron transfer rate,excellent OER performance and long-term stability in 1.0 mol/L KOH electrolyte.The doping of HTS-1 zeolite and in-situ treatment process reduce the electron transfer resistance of Ni-P-HTS-1/NF-T composite,increase its electrocatalytic active surface area,and change the chemical composition of the composite to form nickel phosphide and hydroxide which can provide catalytic active centers for electrocatalytic oxygen evolution reaction,thus effectively improving the OER performance of Ni-P-HTS-1/NF-T composite.