石墨烯
选择性
材料科学
法拉第效率
催化作用
硼酸
可逆氢电极
氧化物
硼
电催化剂
电合成
无机化学
制氢
化学工程
氢
退火(玻璃)
析氧
电极
氧气
纳米技术
氧还原反应
热处理
电化学
氧还原
氧化石墨烯纸
作者
Gang Bai,Liuyue Cao,Lei Du,Xiaotong Han,Binwei Zhang,Lei Zhang,Baoshan Hu,Huan Liu,Shi Xue Dou
出处
期刊:Small
[Wiley]
日期:2025-10-16
卷期号:21 (48): e07029-e07029
标识
DOI:10.1002/smll.202507029
摘要
Carbon-based electrocatalysts are promising candidates for the two-electron oxygen reduction reaction (2e- ORR) to produce H2O2. 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 H2 atmospheres. The optimized closed-pore B, O-graphene catalyst exhibits outstanding 2e- ORR performance, featuring >90% H2O2 selectivity across a wide potential window (≥0.3 V vs Reversible Hydrogen Electrode (RHE)), a remarkable production rate of 154.7 ± 2.3 mmol gcat -1 h-1, and a Faradaic efficiency of ≈96% at 0.3 V versus RHE. Combined experimental and theoretical studies reveal that the BC2O moieties in the closed-pore graphene lattice, serve as the active centers, enabling exceptional selectivity.
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