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Controllable Conversion from Single-Crystal Nanorods to Polycrystalline Nanosheets of NiCoV-LTH for Oxygen Evolution Reaction at Large Current Density
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-10-22 , DOI: 10.1021/acssuschemeng.0c06052
Qianqian Liu 1 , Jianfeng Huang 1 , Xiao Zhang 1 , Liyun Cao 1 , Dan Yang 1 , Jae-hyun Kim 2 , Liangliang Feng 1
Affiliation  

We report the in situ generation of NiCoV-LTH (layered triple hydroxide) on nickel foam (NF) for electrocatalytic oxygen evolution reaction (OER). By adjusting the molar ratio of Co/V, the NiCoV-LTH/NF material can achieve the conversion from single-crystal nanoneedles to polycrystalline nanosheets. Especially, the resultant NiCoV-LTH polycrystalline nanosheets (denoted as P-NiCoV-LTH/NF) only require ultralow overpotentials of 340 and 373 mV to reach the large current density of 500 and 1000 mA cm–2 for OER, respectively, and exhibit ultrastrong durability for over 180 h.

中文翻译:

NiCoV-LTH从单晶纳米棒到多晶纳米片的可控转化,可在大电流密度下进行氧气释放反应

我们报告NiCoV-LTH(层状三重氢氧化物)在泡沫镍(NF)上的电催化氧放出反应(OER)的原位生成。通过调节Co / V的摩尔比,NiCoV-LTH / NF材料可以实现从单晶纳米针到多晶纳米片的转化。尤其是,所得的NiCoV-LTH多晶纳米片(称为P-NiCoV-LTH / NF)仅需要340和373 mV的超低过电势即可分别达到OER的500和1000 mA cm –2的大电流密度,并表现出超过180小时的超强耐用性。
更新日期:2020-11-02
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