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Efficient electrocatalysis of overall water splitting by ultrasmall NixCo3-xS4 coupled Ni3S2 nanosheet arrays
Wu, Yuanyuan1; Liu, Yipu1; Li, Guo-Dong1; Zou, Xu1; Lian, Xinran1; Wang, Dejun1,5; Sun, Lei4; Asefa, Tewodros2,3; Zou, Xiaoxin1
关键词Water Splitting Nickel Sulfide Cobalt Sulfide Electrocatalysis Composite Material
刊名NANO ENERGY
2017-05-01
DOI10.1016/j.nanoen.2017.03.024
35页:161-170
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
研究领域[WOS]Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
关键词[WOS]HYDROGEN EVOLUTION REACTION ; CATION-EXCHANGE REACTIONS ; LAYERED DOUBLE HYDROXIDE ; OXYGEN-EVOLUTION ; BIFUNCTIONAL ELECTROCATALYSTS ; HIGH-PERFORMANCE ; CARBON NANOTUBES ; CADMIUM IONS ; RICH CARBON ; CATALYSTS
英文摘要The overall water splitting into hydrogen and oxygen is one of the most promising ways to store intermittent solar and wind energy in the form of chemical fuels. However, this process is quite thermodynamically uphill, and thus needs to be mediated simultaneously by efficient hydrogen evolving and oxygen evolving catalysts to get any feasible output from it. Herein, we report the synthesis of such a catalyst comprising ultrasmall NixCo3-xS4-decorated Ni3S2 nanosheet arrays supported on nickel foam (NF) via a partial cation exchange reaction between NF-supported Ni3S2 nanosheet arrays and cobalt(II) ions. We show that the as-prepared material, denoted as NixCo3-xS4/Ni3S2/NF, can serve as a self-standing, noble metal-free, highly active and stable, bifunctional electrocatalyst for the two half reactions involved in the overall water splitting: the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). Furthermore, we demonstrate that a high-performance electrolyzer for the overall water splitting reaction can be assembled by using NixCo3-xS4/Ni3S2/NF as the electrocatalyst at both the cathode and the anode sides of the electrolyzer. This electrolyzer delivers water-splitting current densities of 10 and 100 mA/cm(2) at applied potentials of 1.53 and 1.80 V, respectively, with remarkable stability for >200 h in both cases. The electrolyzer's performance is much better than the performances of electrolyzers assembled from many types of other bifunctional electrocatalysts as catalyst couple. Moreover, the overall performance of the electrolyzer is comparable with the performances of electrolyzers containing two different, benchmark, monofunctional HER and OER electrocatalyst couple (i.e., Pt/C-IrO2).
语种英语
WOS记录号WOS:000400647900019
引用统计
被引频次:67[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/152020
专题中国科学院大连化学物理研究所
作者单位1.Jilin Univ, State Key Lab Inorgan Synth & Preparat Chem, Int Joint Res Lab Nanomicro Architecture Chem, Coll Chem, Changchun 130012, Peoples R China
2.Rutgers State Univ, Dept Chem & Chem Biol, Piscataway, NJ 08854 USA
3.Rutgers State Univ, Dept Chem & Biochem Engn, Piscataway, NJ 08854 USA
4.Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
5.Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China
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GB/T 7714
Wu, Yuanyuan,Liu, Yipu,Li, Guo-Dong,et al. Efficient electrocatalysis of overall water splitting by ultrasmall NixCo3-xS4 coupled Ni3S2 nanosheet arrays[J]. NANO ENERGY,2017,35:161-170.
APA Wu, Yuanyuan.,Liu, Yipu.,Li, Guo-Dong.,Zou, Xu.,Lian, Xinran.,...&Zou, Xiaoxin.(2017).Efficient electrocatalysis of overall water splitting by ultrasmall NixCo3-xS4 coupled Ni3S2 nanosheet arrays.NANO ENERGY,35,161-170.
MLA Wu, Yuanyuan,et al."Efficient electrocatalysis of overall water splitting by ultrasmall NixCo3-xS4 coupled Ni3S2 nanosheet arrays".NANO ENERGY 35(2017):161-170.
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