Smolska, AleksandraLock, NinaQuinson, Jonathan2026-05-142026-05-142026-04-03A.Smolska, N.Lock, and J.Quinson, “On the Overlooked Effect of Counter-Cations From Borohydrides for the Gold- and Metal- Mediated Catalytic Reduction of 4-Nitrophenol.” Small Methods10, no. 9 (2026): e02277. https://doi.org/10.1002/smtd.202502277https://hdl.handle.net/2183/48252Financiado para publicación en acceso aberto: Universidade da Coruña/CISUG[Abstract] The catalytic reduction of 4-nitrophenol to 4-aminophenol is a widely used model reaction for water treatment and to evaluate the catalytic activity of nanomaterials. Here, we report on the strong, yet overlooked, effect of cations in the borohydride-mediated reduction of 4-nitrophenol using gold as a catalyst. Catalytic activity consistently increases in the order Li+ < Na+ << K+, with KBH4 leading to the highest turnovers compared to LiBH4 or NaBH4, both with pre-formed gold nanoparticles but also using HAuCl4, AgNO3, or Pd(NO3)2.engAttribution-NonCommercial 4.0 Internationalhttp://creativecommons.org/licenses/by-nc/4.0/4-nitrophenolBenchmarkingCatalysisCationsGoldKBH4Nanoparticlesjournal articleopen access10.1002/smtd.202502277