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Cobalt Intercalated Layered NiFe Double Hydroxidesnfor the Oxygen Evolution Reaction 含钴层状NiFe双氢氧化物的析氧反应
Figshare Pub Date : 2017-10-11 DOI: 10.1021/acs.jpcb.7b06935.s001
AkilaC. Thenuwara (1476748), Nuwan H. Attanayake (4505872), Jie Yu (150626), John P. Perdew (2006074), Evert J. Elzinga (1406800), Qimin Yan (1752490), Daniel R. Strongin (1235904)
{"title":"Cobalt Intercalated Layered NiFe Double Hydroxidesnfor the Oxygen Evolution Reaction","authors":"AkilaC. Thenuwara (1476748), Nuwan H. Attanayake (4505872), Jie Yu (150626), John P. Perdew (2006074), Evert J. Elzinga (1406800), Qimin Yan (1752490), Daniel R. Strongin (1235904)","doi":"10.1021/acs.jpcb.7b06935.s001","DOIUrl":"https://doi.org/10.1021/acs.jpcb.7b06935.s001","url":null,"abstract":"Wenpresent a combined experimental and theoretical study to demonstratenthat the electrocatalytic activity of NiFe layered double hydroxidesn(NiFe LDHs) for the oxygen evolution reaction (OER) can be significantlynenhanced by systematic cobalt incorporation using coprecipitationnand/or intercalation. Electrochemical measurements show that cobaltnmodified NiFe LDH possesses an enhanced activity for the OER relativento pristine NiFe LDH. The Co-modified NiFe LDH exhibits overpotentialsnin the range of 290–322 mV (at 10 mA cm<sup>–2</sup>), depending on the degree of cobalt content. The best catalyst,ncobalt intercalated NiFe LDH achieved a current density of 10 mA cm<sup>–2</sup> at an overpotential of ∼265 mV (compared ton310 mV for NiFe LDH), with a near unity (99%) faradaic efficiencynand long-term stability. Density functional theory calculations revealednthat enhanced activity of Co-modified NiFe LDH could be attributednto the ability of Co to tune the electronic structure of the NiFenLDH so that optimal binding of OER reaction intermediates could benachieved.","PeriodicalId":522035,"journal":{"name":"Figshare","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147890219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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