Abstract Here, first-time synthesis and characterization of highly effective and relatively low-cost poly (N-vinyl-2-pyrrolidone)-stabilized cobalt-rhodium nanoclusters and their employment as catalysts to generate hydrogen from ammonia borane via hydrolysis pathway is reported. They are readily synthesized by co-reduction of cobalt and rhodium cations in ethanol/water mixture under reflux temperature. They are found to be highly stable for a long time without any precipitation. Their size, morphology, and chemical composition are determined by advanced analytical techniques of ultraviolet–visible (UV–Vis) electronic absorption spectroscopy, transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). They are found to be highly recyclable and effective catalysts for hydrogen release from ammonia borane hydrolysis reaction at very low concentrations and temperature, providing initial turnover frequency (TOF) of 154 min−1 and activation energy of 42.7 kJ mol−1.

中文翻译：

---

双金属钴-铑纳米团簇作为氨硼烷水解制氢的有效催化剂的合成与表征

摘要在此，首次合成和表征了高效且成本相对较低的聚（N-乙烯基-2-吡咯烷酮）-稳定的钴-铑纳米团簇，并将其用作催化剂，通过水解途径从氨硼烷中制氢。它们很容易通过钴和铑阳离子在乙醇/水混合物中在回流温度下共同还原而合成。发现它们在很长一段时间内高度稳定，没有任何沉淀。它们的尺寸、形态和化学成分由紫外-可见 (UV-Vis) 电子吸收光谱、透射电子显微镜 (TEM) 和 X 射线光电子能谱 (XPS) 等先进分析技术确定。