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Designing a bimetallic transition metal oxide/hydroxide composite for effective electrocatalytic oxygen evolution reaction

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Abstract
The oxygen evolution reaction (OER), owing to its sluggish nature, demands efficient and stable catalysts with low production cost, during the electrocatalytic water splitting. In this respect, a series of bimetallic ZnO-Ni(OH)2 composite materials were prepared as electrode materials for OER. The synthetic procedure followed the polyvinylpyrrolidone (PVP) and dopamine (DA) assisted hydrothermal process. The growth modification ability of PVP and adhesive property of polydopamine (from DA) were utilized to attain the 3D interconnected structures. The precursor concentrations were varied to obtain most efficient catalyst, ZNDP-1. In alkaline medium, ZNDP-1 showed a low over potential of 170 mV (@10 mAcm- 2 current density) and a Tafel slope of 61 mV dec- 1 with significant stability. The surface defects, porosity and synergism within metal centers might cause efficient electrocatalytic activity. Furthermore, DFT studies were performed to understand the mechanistic pathway.
Author(s)
강성구오티옌린정진석허승현Jayasmita JanaK.C. Bhamu
Issued Date
2021
Type
Article
Keyword
Bi-metallic compositeDFTElectrocatalysisManufacturing costsOxygen evolution reactionPovidoneTransition metal compoundsTransition metals
DOI
10.1016/j.apsusc.2021.150253
URI
https://oak.ulsan.ac.kr/handle/2021.oak/9238
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_gale_infotracacademiconefile_A665247779&context=PC&vid=ULSAN&lang=ko_KR&search_scope=default_scope&adaptor=primo_central_multiple_fe&tab=default_tab&query=any,contains,Designing%20a%20bimetallic%20transition%20metal%20oxide%2Fhydroxide%20composite%20for%20effective%20electrocatalytic%20oxygen%20evolution%20reaction&offset=0&pcAvailability=true
Publisher
APPLIED SURFACE SCIENCE
Location
네덜란드
Language
영어
ISSN
0169-4332
Citation Volume
562
Citation Number
1
Citation Start Page
150253
Citation End Page
150253
Appears in Collections:
Engineering > Chemical Engineering
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