Bimetallic catalysts combining precious and earth-abundant metals in well designed nanoparticle architectures can enable cost efficient and stable heterogeneous catalysis. Here, we present an interaction-driven in-situ approach to engineer finely dispersed Ni decorated Pt nanoparticles (1-6 nm) on perovskite nanofibres via reduction at high temperatures (600-800 ^oC). Deposition of Pt (0.5 wt%) enhances the reducibility of the perovskite support and promotes the nucleation of Ni cations via metal-support interaction, thereafter the Ni species react with Pt forming alloy nanoparticles, with the combined processes yielding smaller nanoparticles that either of the contributing processes. Tuneable uniform Pt-Ni nanoparticles are produced on the perovskite surface, yielding reactivity and stability surpassing 1 wt.% Pt/γ-Al₂O₃ catalysts for CO oxidation. This approach heralds the possibility of in-situ fabrication of supported bimetallic nanoparticles with engineered compositional distributions and performance.

双金属催化剂将贵金属和储量丰富的金属结合在精心设计的纳米颗粒结构中，可以实现成本高效且稳定的多相催化。在这里，我们提出了一种相互作用驱动的原位方法，通过高温（600-800 ^o C）还原，在钙钛矿纳米纤维上设计精细分散的镍装饰铂纳米颗粒（1-6 nm）。 Pt (0.5 wt%) 的沉积增强了钙钛矿载体的还原性，并通过金属-载体相互作用促进 Ni 阳离子的成核，此后 Ni 物质与 Pt 反应形成合金纳米颗粒，结合过程产生比两种方法中任何一种都更小的纳米颗粒。贡献过程。在钙钛矿表面上生成可调节的均匀 Pt-Ni 纳米颗粒，其反应活性和稳定性超过 1 wt.% Pt/γ-Al ₂ O ₃催化剂的 CO 氧化反应。这种方法预示着原位制造具有工程化成分分布和性能的负载型双金属纳米颗粒的可能性。