制备低成本、环保、性能优异的双功能催化剂在能源储存与转换方面至关重要。通过溶剂热法制备了镍钴前驱体,通过控制硫化温度影响阴离子交换速率和硫化物成型的结构,得到不同硫化温度的表面粗糙多孔的核壳结构NiCo2S4催化剂。结果表明:硫化温度160℃合成的NiCo2S4具有0.76V的ORR半坡电位,并且其阴极氧还原反应在10mA/cm2处的过电位仅为426.6mV。双金属核壳NiCo硫化物的制备及其优异的双功能催化性能为新能源储存及转换技术提供了新的思路。
The preparation of low-cost,environmentally friendly,and high-performance bifunctional catalysts is crucial for energy storage and conversion.NiCo-glycerate nanospheres were prepared by solvothermal method,and NiCo2S4 catalysts with rough and porous core-shell structures at different sulfidation temperatures were obtained by controlling the sulfidation temperature to affect the anion exchange rate and the structure of sulfide molding.The test results showed that the NiCo2S4 synthesized at 160℃ had an ORR half-slope potential of 0.76V,and the overpotential of NiCo2S4 at OER 10mA/cm2 was only 426.6mV.The successful preparation of bimetallic core-shell NiCo sulfide and its excellent bifunctional catalytic performance provide a new idea for new energy storage and conversion technology.
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基金资助
国家自然科学基金(U1804146)
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