Ag–Au alloy nanoparticles were effortlessly synthesized with the seed Ag nanoparticles acting as sacrificial template for the effective reduction of Au³⁺ ions to Au⁰ atoms, augmented in the presence of the monomer, NVP (N-vinyl pyrrolidone) assimilated in specific solvents. The conventional spherical morphology of the different Ag–Au alloy molar compositions confirmed using TEM corroborates their red-shifted optical absorption spectra along with the strain induced XRD patterns in accordance with Vegard's law. FTIR spectroscopy depicts clearly the solvation property of NVP and also its respective molecular interaction of individual metal and alloy nanostructures. The amine group of NVP despite its possible steric hindrance seems to coordinate well with monometallic Ag nanoparticles; while for bimetallic Ag–Au nanoparticles, the combined amine and carbonyl groups plays a major role in stabilizing the nanostructure. No evidence of oligomerization/polymerization is observed even after the formation of respective nanoparticles, representing the intriguing configuration of the monomer NVP, the behavior of which seems equivalent to that of its long chain polymer counterpart, PVP. The catalytic properties of the as-synthesized Ag–Au alloy nanoparticles were carefully analyzed in comparison with other polymer/surfactant coated alloy nanoparticles and their significance is established in a cohesive manner.

Ag-Au 合金纳米粒子可以毫不费力地合成，其中种子 Ag 纳米粒子作为牺牲模板，用于将 Au ³⁺离子有效还原为 Au ⁰原子，并在单体 NVP（N-乙烯基吡咯烷酮）在特定溶剂中同化。使用 TEM 确认的不同 Ag-Au 合金摩尔成分的常规球形形态证实了它们的红移光学吸收光谱以及根据 Vegard 定律的应变诱导 XRD 图案。FTIR 光谱清楚地描绘了 NVP 的溶剂化特性以及其各自的金属和合金纳米结构的分子相互作用。尽管可能存在空间位阻，但 NVP 的胺基似乎与单金属 Ag 纳米粒子协调良好；而对于双金属 Ag-Au 纳米粒子，结合的胺和羰基在稳定纳米结构方面起着重要作用。即使在各自的纳米粒子形成之后也没有观察到低聚/聚合的迹象，代表单体 NVP 的有趣构型，其行为似乎与其长链聚合物对应物 PVP 的行为相同。与其他聚合物/表面活性剂涂覆的合金纳米粒子相比，仔细分析了合成的 Ag-Au 合金纳米粒子的催化性能，并以内聚方式确定了它们的重要性。