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Oxygen Electrocatalysis at Mn-III-O-x-C Hybrid Heterojunction: An Electronic Synergy or Cooperative Catalysis?
Wu, Kuang-Hsu; Huang, Xing; Tahini, Hassan; Kappen, Peter; Huang, Rui; Tan, Xin; Jang, Ling-Yun; Ding, Yuxiao; Smith, Sean C.; Qi, Wei; Gentle, Ian R.; Su, Dang-Sheng; Amal, Rose; Wang, Da-Wei
2019-01-09
Source PublicationACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
Volume11Issue:1Pages:706-713
AbstractThe interface at the metal oxide-carbon hybrid heterojunction is the source to the well-known "synergistic effect" in catalysis. Understanding the structure-function properties is key for designing more advanced catalyst-support systems. Using a model Mn-III-O-x single-layer catalyst on carbon, we herein report a full elucidation to the catalytic synergism at the hybrid heterojunction in the oxygen reduction reaction (ORR). The successful fabrication of the single-layer catalyst from bottom-up is fully characterized by the X-ray absorption fine structure and high-resolution transmission electron microscopy. For oxygen electrocatalysis over this model hybrid heterostructure, our results, from both theory and experiment, show that the synergistic ORR truly undergoes a cooperated two-step electrocatalysis with catalytic promotion (Delta E-onset = 60 mV) near the heterojunction and over the single-layer catalyst through an interfacial electronic interplay, rather than an abstruse transition towards a one-step dissociative pathway. Finally, we report a superior peroxide-reducing activity of 432.5 mA cm(-2) mg((M))(-1) over the Mn-III-O-x single-layer.
Keywordhybrid heterojunction single-layer catalyst synergistic effect cooperative catalysis oxygen reduction
Indexed BySCI
Language英语
WOS IDWOS:000455561200073
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81465
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Wu, Kuang-Hsu,Huang, Xing,Tahini, Hassan,et al. Oxygen Electrocatalysis at Mn-III-O-x-C Hybrid Heterojunction: An Electronic Synergy or Cooperative Catalysis?[J]. ACS APPLIED MATERIALS & INTERFACES,2019,11(1):706-713.
APA Wu, Kuang-Hsu.,Huang, Xing.,Tahini, Hassan.,Kappen, Peter.,Huang, Rui.,...&Wang, Da-Wei.(2019).Oxygen Electrocatalysis at Mn-III-O-x-C Hybrid Heterojunction: An Electronic Synergy or Cooperative Catalysis?.ACS APPLIED MATERIALS & INTERFACES,11(1),706-713.
MLA Wu, Kuang-Hsu,et al."Oxygen Electrocatalysis at Mn-III-O-x-C Hybrid Heterojunction: An Electronic Synergy or Cooperative Catalysis?".ACS APPLIED MATERIALS & INTERFACES 11.1(2019):706-713.
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