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Orienting Active Crystal Planes of New Class Lacunaris Fe2PO5 Polyhedrons for Robust Water Oxidation in Alkaline and Neutral Media
Dalian Univ Technol, Inst Energy Sci & Technol, DUT KTH Joint Educ & Res Ctr Mol Devices, State Key Lab Fine Chem, Dalian 116024, Peoples R China..
Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Jilin, Peoples R China.;Univ Sci & Technol China, Sch Appl Chem & Engn, Hefei 230026, Anhui, Peoples R China..
Dalian Univ Technol, Inst Energy Sci & Technol, DUT KTH Joint Educ & Res Ctr Mol Devices, State Key Lab Fine Chem, Dalian 116024, Peoples R China..
Dalian Univ Technol, Inst Energy Sci & Technol, DUT KTH Joint Educ & Res Ctr Mol Devices, State Key Lab Fine Chem, Dalian 116024, Peoples R China..
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2018 (English)In: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 28, no 35, article id 1801397Article in journal (Refereed) Published
Abstract [en]

Developing efficient and stable oxygen evolution reaction (OER) electrocatalysts is essential for realizing sustainable energy conversion, such as solar fuels. Although modulating active sites and electron transfer is of great significance to boost electrocatalysis activity, it still remains a big challenge to desirably actualize this goal. Herein, engineering of active sites and electronic framework is implemented via oriented modulation of crystal planes and construction of lacunaris architecture supported by ammonification-elicited simultaneous incorporation of nitrogen and oxygen-defect strategy. The new class porous nitrogen-incorporated Fe2PO5 with oxygen-defect (N-Fe2PO5-x) polyhedron with dominantly exposed {110} reactive facets exhibits superior performance toward water oxidation, achieving current densities of 10 mA cm(-2) at quite low overpotentials of 235 and 315 mV in alkaline and neutral media, respectively. Furthermore, density functional theoretical calculations reveal the energetically favorable {110} planes of lower absorption energy of intermediates and remolding of electronic density framework arising from the ammoniated elicitation process, contributing to excellent OER performance of lacunaris N-Fe2PO5-x polyhedrons. This work may offer a feasible guideline for regulating active sites and electron transfer to develop low-cost and highly efficient OER electrocatalysts in energy conversion systems.

Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2018. Vol. 28, no 35, article id 1801397
Keywords [en]
active plane, electronic framework, Fe2PO5 polyhedrons, lacunaris structure, water oxidation
National Category
Theoretical Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-234591DOI: 10.1002/adfm.201801397ISI: 000442731200004Scopus ID: 2-s2.0-85051403008OAI: oai:DiVA.org:kth-234591DiVA, id: diva2:1248333
Funder
Swedish Energy Agency
Note

QC 20180914

Available from: 2018-09-14 Created: 2018-09-14 Last updated: 2018-09-14Bibliographically approved

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Sun, Licheng

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