https://scholars.lib.ntu.edu.tw/handle/123456789/575722
Title: | Strong Catalyst-Support Interactions in Electrochemical Oxygen Evolution on Ni-Fe Layered Double Hydroxide | Authors: | Gu, Haoyang et al. HAO MING CHEN |
Keywords: | Binary alloys; Catalysis; Catalyst activity; Chemical shift; Cobalt; Electrocatalysts; Iron compounds; Nickel compounds; Oxygen; Phase interfaces; Precious metals; Tin oxides; Water gas shift; Activity enhancement; Aqueous electrochemistry; Electrical conductivity; Electrocatalytic activity; Electrocatalytic system; Electrochemical oxygen; Layered double hydroxides; Water gas shift (WGS) reaction; Catalyst supports | Issue Date: | 2020 | Journal Volume: | 5 | Journal Issue: | 10 | Start page/Pages: | 3185-3194 | Source: | ACS Energy Letters | Abstract: | Strong catalyst-support interaction plays a key role in heterogeneous catalysis, as has been well-documented in high-temperature gas-phase chemistry, such as the water gas shift reaction. Insight into how catalyst-support interactions can be exploited to optimize the catalytic activity in aqueous electrochemistry, however, is still lacking. In this work, we show the rationally designed electrocatalyst/support interface can greatly impact the overall electrocatalytic activity of Ni-Fe layered double hydroxide (NiFeLDH) in water oxidation. In particular, the use of Co as a non-noble metal support greatly improves the activity of NiFeLDH 10-fold compared to the traditional electrocatalytic supports such as fluorine-/indium-doped tin oxide (FTO/ITO) and glassy carbon. We attribute the activity enhancement of NiFeLDH/Co to the in situ formation of a porous NiFeCoOxHy layer via Co incorporation, which dramatically promotes the redox chemistry of metal centers on the outer surface and enhances the electrical conductivity of the catalyst over 2 orders of magnitude. This new discovery highlights the importance of a rationally designed electrocatalyst/support interface and offers a new paradigm for designing and developing highly active electrocatalytic systems via marrying catalyst and support and creating synergy. Copyright ? 2020 American Chemical Society. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85094903453&doi=10.1021%2facsenergylett.0c01584&partnerID=40&md5=9d6c6a6fe234c459bb70ef6e1eafba88 https://scholars.lib.ntu.edu.tw/handle/123456789/575722 |
ISSN: | 23808195 | DOI: | 10.1021/acsenergylett.0c01584 |
Appears in Collections: | 化學系 |
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