铂纳米团簇催化剂的制备及产氢性能研究  

Preparation and hydrogen evolution properties of platinum nanocluster catalysts

作　　者：李鲁冰 张蕾 卫莉婷 苏进展[1] 郭烈锦[1] LI Lubing;ZHANG Lei;WEI Liting;SU Jinzhan;GUO Liejin(State Key Laboratory of Multiphase Flow in Power Engineering,Xi′an Jiaotong University,Xi′an 710049,Shaanxi Province,China)

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,陕西西安710049

出　　处：《化学工程》2024年第5期19-24,32,共7页Chemical Engineering(China)

基　　金：国家重点研发计划项目(2021YFF0500504);国家自然科学基金基础科学中心项目(51888103);国家自然科学基金面上项目(51976169)。

摘　　要：电催化产氢技术对于推动清洁能源的发展至关重要。基于强金属-载体相互作用,利用铁单原子锚定效应制备负载于多孔碳氮材料的超细铂纳米团簇材料Pt@Fe-N-C,并对材料进行结构表征以及电催化测试。结果表明:Pt@Fe-N-C继承了ZIF-8的正十二面体的多孔结构,且其中的铁单原子通过锚定铂纳米团簇实现铂的良好分散。该材料在0.5 mol/L硫酸溶液中展现出优异的HER(电催化析氢反应)活性和稳定性,过电势η_(10)仅为17 mV,且在3000圈循环退化测试后,η_(10)仅增加4 mV。此外,在20 mV(vs.Ag/AgCl)过电势下,Pt@Fe-N-C的质量活性[12.43 mA/(cm^(2)·μg)]是商业铂碳[2.05 mA/(cm^(2)·μg)]的6.1倍。因此,利用单原子锚定效应分散铂是一种降低贵金属使用量的有效策略,并为今后发展低贵金属电催化材料提供新的思路。The electrocatalytic hydrogen production technology plays a pivotal role in promoting the development of clean energy.Based on the strong metal-support interactions,the Pt nanocluster material on porous nitrogen doped carbon materials was prepared by using the anchoring effect of iron single atom(Pt@Fe-N-C),and the material underwent structural characterization and electrocatalytic testing.The results show that the Pt@Fe-N-C material inherits the porous dodecahedron structure of ZIF-8,in which iron single atoms have an anchoring effect and thus disperse the platinum nanoclusters.Pt@Fe-N-C exhibits excellent electrocatalytic HER(hydrogen evolution reaction)activity and stability in 0.5 mol/L sulfuric acid solution with an overpotentialη_(10)of 17 mV,and the increase ofη_(10)is only 4 mV after degradation of the 3000-cycling test.In addition,the mass-activity of Pt@Fe-N-C[12.43 mA/(cm^(2)·μg)]is 6.1 times than that of commercial Pt/C[2.05 mA/(cm^(2)·μg)]at overpotential of 20 mV(vs.Ag/AgCl).As a result,the dispersion of platinum through the single-atom anchoring effect is an effective strategy to reduce the loading of precious metals,and this approach provides a new idea for the future development of low-precious-metal electrocatalytic materials.

关 键 词：催化剂 强金属-载体相互作用 纳米材料 氢能 可再生能源 

分 类 号：TK91[动力工程及工程热物理]