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Highly Selective Hydrogen Peroxide Electrosynthesis on Carbon: In Situ Interface Engineering with Surfactants
Wu, Kuang-Hsu; Wang, Dan; Lu, Xingyu; Zhang, Xuefei; Xie, Zailai; Liu, Yuefeng; Su, Bing-Jian; Chen, Jin-Ming; Su, Dang-Sheng; Qi, Wei; Guo, Shaojun
2020-06-11
Source PublicationCHEM
Volume6Issue:6Pages:1443-1458
AbstractIn situ modulation of surface reaction is a powerful approach to drive high-yield H2O2 electrosynthesis on metal-free carbon. Here, we discover that cationic surfactants can work efficiently as an in situ kinetic promoter for the oxygen-to-peroxide reaction on a car bon black electrode, achieving a peroxide yield above 90% (up to 95.2%) across a >0.8 V window in alkaline media, the best among reported H2O2 electrocatalysts. Our characterizations and kinetic model analysis show that the high peroxide selectivity is attributable to surface carboxylates (-COO-) with weak peroxide binding under a Coulombic pull imposed by an adsorbed cationic layer. Although surface carbonyls (-C=O) also participate in the peroxide synthesis, they exhibit strong binding to peroxide and promote on-site reduction at moderate-to-high overpotential. At only a minute amount of cationic surfactant, a chronoamperometry experiment with a carbonyl-free system can deliver a peroxide production at a sustainably high selectivity (similar to 96%) over 10h.
DOI10.1016/j.chempr.2020.04.002
WOS IDWOS:000540905600030
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/82778
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Wu, Kuang-Hsu,Wang, Dan,Lu, Xingyu,et al. Highly Selective Hydrogen Peroxide Electrosynthesis on Carbon: In Situ Interface Engineering with Surfactants[J]. CHEM,2020,6(6):1443-1458.
APA Wu, Kuang-Hsu.,Wang, Dan.,Lu, Xingyu.,Zhang, Xuefei.,Xie, Zailai.,...&Guo, Shaojun.(2020).Highly Selective Hydrogen Peroxide Electrosynthesis on Carbon: In Situ Interface Engineering with Surfactants.CHEM,6(6),1443-1458.
MLA Wu, Kuang-Hsu,et al."Highly Selective Hydrogen Peroxide Electrosynthesis on Carbon: In Situ Interface Engineering with Surfactants".CHEM 6.6(2020):1443-1458.
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