Self-assembled synthesis of Pd/SPEn from polyelectrolyte membranes for efficient direct synthesis of H2O2 via inhibiting the dissociation of O- O bond

Although a high-activity yield of hydrogen peroxide (H2O2) can be achieved by direct synthesis from hydrogen and oxygen, developing an extreme catalyst with high activity and stability is still very challenging, which limits its industrial application. Here, we reported a catalyst Pd/SPE with polyelectrolyte membranes SPE as an electronic acceptor to anchor Pd, which achieves H2O2 selectivity of 90.1% and productivity of 5764.4 mmol & BULL;gPd 1 & BULL;h-1. The results of TEM, XRD and ICP-MS, XPS, CO-DRIFT, O2-TPD, synchrotron radiation and density functional theory (DFT) simulations reveal that the electrons of Pd are transferred into polyelectrolyte membranes and Pd clusters are strongly chemisorbed on SPE, which is beneficial for O2 adsorption and inhibits the dissociation of O-O bond, leading to significantly enhanced H2O2 productivity and selectivity.