Polymer supported nickel nanoparticles, generated by calcination under nitrogen of a Ni(II) containing polyacrylamide, catalyzed the hydrogenation of nitroarenes to anilines in aqueous medium at room temperature in the presence of NaBH₄. The protocol generally favored the formation of the desired aniline as single product in high yields with short reaction times and proved to be highly selective in the hydrogenation of halonitrobenzene to haloaniline, avoiding the formation of hydro-dehalogenated side-products. The catalyst displayed excellent recyclability over at least five cycles (which is not trivial for nickel nanoparticle based catalysts used in water) and no leaching of metal into solution occurred, that made the overall system eco-friendly and economic. STEM analyses revealed that the thermally formed Ni nanoparticles turned into cubic nanotwins under reaction conditions, which remained almost unchanged with the re-cycles.

聚合物支撑的镍纳米粒子，是在氮气中于室温下在NaBH ₄存在下，通过在氮气氛下将含聚丙烯酰胺的Ni（II）煅烧生成的催化剂，将硝基芳烃氢化为苯胺。。该方案通常有利于以高收率和较短的反应时间以单一产物的形式形成所需的苯胺，并且被证明在卤代硝基苯氢化成卤代苯胺中具有高度选择性，避免了形成加氢脱卤的副产物。该催化剂在至少五个循环中表现出出色的可回收性（对于水中使用的镍纳米颗粒基催化剂而言，这并非微不足道），并且不会发生金属浸出到溶液中的情况，这使整个系统具有环保性和经济性。STEM分析表明，在反应条件下，热成型的Ni纳米颗粒变成立方纳米孪晶，而在循环过程中几乎保持不变。