1. Highly active, selective, and stable Pd single-atom catalyst anchored on N-doped hollow carbon sphere for electrochemical H₂O₂ synthesis under acidic conditions
- Author
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Xi, Jiangbo, Yang, Sungeun, Silvioli, Luca, Cao, Sufeng, Liu, Pei, Chen, Qiongyang, Zhao, Yanyan, Sun, Hongyu, Hansen, Johannes Novak, Haraldsted, Jens-Peter B., Kibsgaard, Jakob, Rossmeisl, Jan, Bals, Sara, Wang, Shuai, and Chorkendorff, Ib more...
- Subjects
Chemistry - Abstract
Single-atom catalysts (SACs) have recently attracted broad scientific interests due to their unique structural feature, the single-atom dispersion. Optimized electronic structure as well as high stability are required for single-atom catalysts to enable efficient electrochemical production of H2O2. Herein, we report a facile synthesis method that stabilizes atomic Pd species on the reduced graphene oxide/Ndoped carbon hollow carbon nanospheres (Pd1/N-C). Pd1/N-C exhibited remarkable electrochemical H2O2 production rate with high faradaic efficiency, reaching 80%. The single-atom structure and its high H2O2 production rate were maintained even after 10,000 cycle stability test. The existence of single-atom Pd as well as its coordination with N species is responsible for its high activity, selectivity, and stability. The N coordination number and substrate doping around Pd atoms are found to be critical for an optimized adsorption energy of intermediate *OOH, resulting in efficient electrochemical H2O2 production. (C) 2020 Elsevier Inc. All rights reserved. more...
- Published
- 2021