Nitroarenes constitute central building blocks in organic synthesis. 1 Both in industry and academic laboratories, their reduction serves as an important method for the preparation of functionalized anilines, which are intermediates for agrochemicals, pharmaceuticals, dyes, and pigments. 2 Traditional non-catalytic processes using either Béchamp or sulfide reduction produce a large amount of waste. 3 Nowadays, in general recyclable heterogeneous catalysts are used ...