第一作者：贡红辉 

通讯作者和单位：贡红辉 河南理工大学

原文链接： DOI: 10.1021/acs.langmuir.3c00850

ABSTRACT: Selective reduction of nitroaromatics to the corresponding aromatic amines is extremely an attractive chemical process for both fundamental research and potential commercial applications. Herewith, we report that highly dispersed Cu catalyst supported on H₃PO₄-activated coffee biochar, and the resulting Cu/PBCR-600 catalyst shows complete conversion of the nitroaromatics and >97.0% selectivity for the corresponding aromatic amines. The TOF of catalyzing the reduction of nitroaromatics (1.55-460.74 min^-1) is approximately 2 to 15 times higher than previously reported non-noble and even noble metal catalysts. Additionally, Cu/PBCR-600 also shows high stability in catalytic recycles. Furthermore, it exhibits long-term catalytic stability (660 min) for practical application in continuous-flow reactor. The characterizations and activity tests reveal that Cu⁰ existing in Cu/PBCR-600 acts as active sites in nitroaromatics reduction. Also, the further characterization by FT-IR and UV-vis demonstrate that N, P co-doped coffee biochar could selectively adsorb and activate the nitro group of nitroaromatics.

 Keywords: Reduction of nitroaromatics; Aromatic amines; Coffee biochar; N, P co-doped; Highly dispersed Cu