The Cooperative Effects of the Rh‐M Dual‐Metal Atomic Pairs in Formic Acid Oxidation

Abstract The continuously increasing mass activity of precious metal in formic acid oxidation reaction (FAOR) is the key to achieving the practical application of direct formic acid fuel cells (DFAFCs). Herein, Rh‐based dual‐metal atomic pairs supported on nitrogen‐doped carbon catalysts [DAP‐(M, Rh)/CN] with adjacent interatomic Rh‐M (M = V, Cr, Mn, Fe, Co, Ni, Cu) have been synthesized by a “host‐guest” strategy. It is discovered that DAP‐(Cr, Rh)/CN shows the highest mass activity of 64.1 A mg −1 , which is 3.8 times higher than that of the single atom Rh catalyst (17.0 A mg −1 ) and two orders of magnitude higher than Pd/C (0.58 A mg −1 ). Interestingly, the mass activity of DAP‐(M, Rh)/CN first increases…

• NN
  National Natural Science Foundation of China

  Awards: 22325101, 22102218, 22388102, 22108213, 22078257
• NS
  Natural Science Foundation of Beijing Municipality

  Award: Z240027
• BN
  Beijing Nova Program
• NK
  National Key Research and Development Program of China

  Award: 2023YFA1506801