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
李鲁冰 1张蕾 1卫莉婷 1苏进展 1郭烈锦1
作者信息
- 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
- 折叠
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η10仅为17 mV,且在3 000圈循环退化测试后,η10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/(cm2·μg)]是商业铂碳[2.05mA/(cm2·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.
Abstract
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 overpotential η10 of 17 mV,and the increase of η10 is only 4 mV after degradation of the 3 000-cycling test.In addition,the mass-activity of Pt@Fe-N-C[12.43 mA/(cm2·μg)]is 6.1 times than that of commercial Pt/C[2.05 mA/(cm2·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Key words
catalyst/strong metal-support interactions/nano materials/hydrogen energy/renewable energy引用本文复制引用
基金项目
国家重点研发计划(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)
出版年
2024
国家科技期刊平台
NSTL
万方数据