All Publications


  • Promoting H2O2 production via 2-electron oxygen reduction by coordinating partially oxidized Pd with defect carbon. Nature communications Chang, Q. n., Zhang, P. n., Mostaghimi, A. H., Zhao, X. n., Denny, S. R., Lee, J. H., Gao, H. n., Zhang, Y. n., Xin, H. L., Siahrostami, S. n., Chen, J. G., Chen, Z. n. 2020; 11 (1): 2178

    Abstract

    Electrochemical synthesis of H2O2 through a selective two-electron (2e-) oxygen reduction reaction (ORR) is an attractive alternative to the industrial anthraquinone oxidation method, as it allows decentralized H2O2 production. Herein, we report that the synergistic interaction between partially oxidized palladium (Pdδ+) and oxygen-functionalized carbon can promote 2e- ORR in acidic electrolytes. An electrocatalyst synthesized by solution deposition of amorphous Pdδ+ clusters (Pd3δ+ and Pd4δ+) onto mildly oxidized carbon nanotubes (Pdδ+-OCNT) shows nearly 100% selectivity toward H2O2 and a positive shift of ORR onset potential by ~320 mV compared with the OCNT substrate. A high mass activity (1.946 A mg-1 at 0.45 V) of Pdδ+-OCNT is achieved. Extended X-ray absorption fine structure characterization and density functional theory calculations suggest that the interaction between Pd clusters and the nearby oxygen-containing functional groups is key for the high selectivity and activity for 2e- ORR.

    View details for DOI 10.1038/s41467-020-15843-3

    View details for PubMedID 32358548

    View details for PubMedCentralID PMC7195490

  • Enhancing C–C Bond Scission for Efficient Ethanol Oxidation using PtIr Nanocube Electrocatalysts ACS Catalysis Chang, Q. 2019

    View details for DOI 10.1021/acscatal.9b02039