https://scholars.lib.ntu.edu.tw/handle/123456789/616367
標題: | Two-dimensional layered NiLiP2S6 crystals as an efficient bifunctional electrocatalyst for overall water splitting | 作者: | Huang S.-J. Muneeb A. Sabhapathy P. Bayikadi K.S. Murtaza T. Raju K. Chen L.-C. Chen K.-H. Sankar R. LI-CHYONG CHEN |
關鍵字: | Bifunctional electrocatalyst;HER (hydrogen evolution reaction);OER (oxygen evolution reaction);Water splitting | 公開日期: | 2021 | 卷: | 11 | 期: | 7 | 來源出版物: | Catalysts | 摘要: | The quest of earth-abundant bifunctional electrocatalysts for highly efficient oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is essential for clean and renewable energy systems. Herein, directed by the experimental analysis, we demonstrate layered nickel lithium phosphosulfide (NiLiP2 S6) crystal as a highly efficient water-splitting catalyst in alkaline media. With strained lattice due to stacked layers as observed by TEM and electronic structure analysis performed by XPS showed mixed Ni2+,3+ oxidation states induced by addition of Li as a cation, NiLiP2 S6 displays excellent OER (current density of 10 mA cm–2 showed an overpotential of 303 mV vs. RHE and a Tafel slope of 114 mV dec–1) and HER activity (current density of −10 mA cm–2 showed an overpotential of 184 mV vs. RHE and a Tafel slope of 94.5 mV dec–1). Finally, an alkaline media was employed to demonstrate the overall water splitting using NiLiP2 S6 as both the anode and the cathode, which attained a 50 mA cm−2 current density at 1.68 V. This bimetallic phosphosulfide, together with long-term stability and enhanced intrinsic activity, shows enormous potential in water splitting applications. © 2021 by the authors. Licensee MDPI, Basel, Switzerland. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85108678214&doi=10.3390%2fcatal11070786&partnerID=40&md5=de19304deba56d830a27e70544a1a2d4 https://scholars.lib.ntu.edu.tw/handle/123456789/616367 |
ISSN: | 20734344 | DOI: | 10.3390/catal11070786 |
顯示於: | 凝態科學研究中心 |
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