ORCID Profile
0000-0001-6971-0797
Current Organisations
University of Aberdeen
,
Xiamen University
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Publisher: American Chemical Society (ACS)
Date: 26-12-2018
Publisher: Wiley
Date: 03-2021
Abstract: Aliovalent doping is widely adopted to tune the electronic structure of transition‐metal oxides for design of low‐cost, active electrocatalysts. Here, using single‐crystalline thin films as model electrocatalysts, the structure‐activity relationship of Fe states doping in perovskite LaNiO 3 for oxygen evolution reaction (OER) is studied. Fe 4+ state is found to be crucial for enhancing the OER activity of LaNiO 3 , dramatically increasing the activity by six times, while Fe 3+ has negligible effect. Spectroscopic studies and DFT calculations indicate Fe 4+ states enhance the degree of Ni/Fe 3 d and O 2 p hybridization, and meanwhile produce down‐shift of the unoccupied density of states towards lower energies. Such electronic features reduce the energy barrier for interfacial electron transfer for water oxidization by 0.2 eV. Further theoretical calculations and H/D isotope experiments reveal the electronic states associated with Fe 4+ ‐O 2− ‐Ni 3+ configuration accelerate the deprotonation of *OH to *O (rate‐determining step), and thus facilitate fast OER kinetics.
Publisher: American Physical Society (APS)
Date: 23-09-2021
Publisher: Springer Science and Business Media LLC
Date: 15-06-2200
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9TA13313E
Abstract: Hole for faster OER: The hole state induced by Fe 4+ promotes the OER process. It reduces the energy barrier for electron transfer at the interface and facilitates a faster electron transfer from reaction intermediates to the catalyst.
Publisher: Elsevier BV
Date: 12-2019
Publisher: Elsevier BV
Date: 2020
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Jun Cheng.