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Highly active, selective, and stable Pd single-atom catalyst anchored on N-doped hollow carbon sphere for electrochemical H2O2 synthesis under acidic conditions
- Source :
- Journal of Catalysis. 393:313-323
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
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/N-doped 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.
- Subjects :
- 010405 organic chemistry
Graphene
Coordination number
Oxide
chemistry.chemical_element
010402 general chemistry
Electrochemistry
01 natural sciences
Catalysis
0104 chemical sciences
law.invention
chemistry.chemical_compound
Chemical engineering
chemistry
law
Physical and Theoretical Chemistry
Selectivity
Carbon
Faraday efficiency
Subjects
Details
- ISSN :
- 00219517
- Volume :
- 393
- Database :
- OpenAIRE
- Journal :
- Journal of Catalysis
- Accession number :
- edsair.doi...........8bbcbb9d99c08029c3a54cccbb3798d7