A nickel-based noble metal multi-shell nanocage material and a preparation method and application thereof
CN121776508BActive Publication Date: 2026-10-16UNIV OF SCI & TECH OF CHINA
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Patent Information
- Application Number
- CN202511799487.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-02
- Publication Date
- 2026-10-16
- Estimated Expiration
- 2045-12-02
AI Technical Summary
Technical Problem
[0005]然而，现有技术在多贵金属壳层纳米笼的制备上仍面临核心性能导向的瓶颈：一方面，缺乏针对多贵金属组分化学特性的精准调控工艺，易出现多壳层间组分互扩散、厚度均匀性差的问题，导致组分协同效应弱化，无法实现预期的催化活性优化；另一方面，基体调控过程中难以兼顾“壳层结构完整性”与“活性位点暴露效率”，常出现外层壳层破裂、内层活性位点被遮蔽或腐蚀的现象，直接影响催化稳定性；此外，多壳层间的界面结合强度设计不足，在电催化反应的循环工况下易发生层间剥离，导致催化性能快速衰减
Benefits of technology
1、本发明选用尺寸60~80 nm的镍纳米颗粒作为核材料，通过控制配体用量来调控贵金属络合与生长速率，结合“贵金属多步精准投料+分步程序升温+体系残留配体复用”的工艺，实现多种贵金属在镍纳米颗粒表面的精准外延生长；再经碳载体负载与无机酸选择性蚀刻，精准去除部分镍基体并保留完整贵金属壳层，最终制备得到具有空心结构的镍基贵金属多壳层纳米笼材料。
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Abstract
The application discloses a kind of nickel-based noble metal multi-shell nanocage materials and its preparation method and application, it is related to nanometer functional material technical field, the present application uses nickel nanoparticle as core material, by controlling ligand dosage to control noble metal complexation and growth rate, combined with "noble metal multi-step accurate dosing+stepwise program temperature rise+system residual ligand reuse" process, realize the accurate epitaxial growth of various noble metals on the surface of nickel nanoparticle;Again, by carbon carrier loading and inorganic acid selective etching, accurately remove part of nickel matrix and retain complete noble metal shell, finally, nickel-based noble metal multi-shell nanocage material with hollow structure is prepared.
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