BC <sub>2</sub> O Active Sites in Closed‐Pore B,O‐Doped Graphene Enable Selective H <sub>2</sub> O <sub>2</sub> Electrosynthesis
Carbon-based electrocatalysts are promising candidates for the two-electron oxygen reduction reaction (2e<sup>-</sup> ORR) to produce H<sub>2</sub>O<sub>2</sub>. However, their low activity and selectivity hinder effective application. Herein, a closed-pore boron and oxygen co-doped graphene (B, O-graphene) catalysts are reported via thermal annealing of graphene oxide and boric acid under tunable H<sub>2</sub> atmospheres. The optimized closed-pore B, O-graphene catalyst exhibits outstanding 2e<sup>-</sup> ORR performance, featuring >90% H<sub>2</sub>O<sub>2</sub> selectivity across a wide potential window (≥0.3 V vs Reversible Hydrogen Electrode (RHE)), a remarkable production rate of 154.7 ± 2.3 mmol g<sub>cat</sub> <sup>-1</sup> h<sup>-1</sup>, and a Faradaic efficiency of ≈96% at 0.3 V versus RHE. Combined experimental and theoretical studies reveal that the BC<sub>2</sub>O moieties in the closed-pore graphene lattice, serve as the active centers, enabling exceptional selectivity.
Authors
- Xiaotong Han (ORCID: https://orcid.org/0000-0002-3124-7183)
- Gang Bai
- Liuyue Cao (ORCID: https://orcid.org/0000-0002-4635-5187)
- Shi Xue Dou (ORCID: https://orcid.org/0000-0003-3824-7693)
- Binwei Zhang (ORCID: https://orcid.org/0000-0002-7023-5986)
- Lei Du (ORCID: https://orcid.org/0000-0001-9584-4748)
- Baoshan Hu (ORCID: https://orcid.org/0000-0002-2793-2444)
- Huan Liu (ORCID: https://orcid.org/0000-0002-0253-647X)
- Lei Zhang (ORCID: https://orcid.org/0000-0001-7608-8350)
Institutions
- Griffith University (AU)
- University of Shanghai for Science and Technology (CN)
- Chongqing University (CN)
Publication Details
- Journal
- Small
- Published
- 2025-10-16
- DOI
- https://doi.org/10.1002/smll.202507029
- Primary Topic
- Electrocatalysts for Energy Conversion
- Type
- article
- Field-Weighted Citation Impact
- 0.00