English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse
  1. View item / 
  2. Item Summary

Item

ITEM ACTIONSEXPORT
Add to Basket
  Local TagsRelease HistoryDetailsSummary

Released
Journal Article

Oxygen Electrocatalysis at Mn-III-O-x-C Hybrid Heterojunction: An Electronic Synergy or Cooperative Catalysis?

MPS-Authors
/persons/resource/persons237783

Ding,  Yuxiao
Research Department Schlögl, Max Planck Institute for Chemical Energy Conversion, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Wu, K.-H., Huang, X., Tahini, H., Kappen, P., Huang, R., Tan, X., et al. (2019). Oxygen Electrocatalysis at Mn-III-O-x-C Hybrid Heterojunction: An Electronic Synergy or Cooperative Catalysis? ACS Applied Materials and Interfaces, 11(1), 706-713. doi:10.1021/acsami.8b16325.


Cite as: https://hdl.handle.net/21.11116/0000-0006-795F-9
Abstract
The 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.