Electrochemically Oxidized Aligned Carbon Nanotube Arrays Embedding Foam Substrates for Water Splitting,ACS Applied Nano Materials

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Electrochemically Oxidized Aligned Carbon Nanotube Arrays Embedding Foam Substrates for Water Splitting
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2023-04-28 , DOI: 10.1021/acsanm.3c01458
Xiaoshuang Zhou ₁ , Fei Fei ₁ , Mingxia Li ₁ , Xiaoting Cao ₁ , Xu Dong ₁ , Lvzhou Li ₂ , Ningyi Yuan ₁ , Jianning Ding _{1,

2}

Affiliation

Designing highly active electrocatalysts for both hydrogen and oxygen evolution with good durability at large current densities is very significant for water splitting. In this study, a new type of catalytic electrode was developed for water splitting. This electrode was made by growing microflower-like NiFeP on an aligned carbon nanotube (CNT) array network skeleton that was embedded in a Ni foam (NF) substrate. This design is aimed at enhancing the electrocatalytic activity for both hydrogen and oxygen evolution. The results showed that the resulting electrode (ECO-NF-ACNT@NiFeP) had a porous structure and was hydrophilic and highly resistant to corrosion, leading to improved activity for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). The overpotential for harvesting a 10 mA cm^–2 OER and HER current density was 97 and 190 mV, respectively, and the overpotential for reaching 100 mA cm^–2 was 345 and 348 mV, respectively. These results are significantly better than those of commercial RuO₂ and Pt/C catalysts and provide a promising direction for developing water splitting catalysts.

中文翻译：

电化学氧化排列碳纳米管阵列嵌入泡沫基板用于水分解

设计在大电流密度下具有良好耐久性的用于析氢和析氧的高活性电催化剂对于水分解非常重要。在这项研究中，开发了一种用于水分解的新型催化电极。该电极是通过在嵌入泡沫镍 (NF) 基板的对齐碳纳米管 (CNT) 阵列网络骨架上生长微花状 NiFeP 制成的。该设计旨在提高氢和氧析出的电催化活性。结果表明，所得电极（ECO-NF-ACNT@NiFeP）具有多孔结构、亲水性和高度耐腐蚀性，从而提高了析氧反应（OER）和析氢反应（HER）的活性。收集 10 mA cm ^{–2的过电势}OER 和 HER 电流密度分别为 97 和 190 mV，达到 100 mA cm ^–2的过电位分别为 345 和 348 mV。这些结果明显优于商业 RuO ₂和 Pt/C 催化剂，为开发水分解催化剂提供了一个有前景的方向。

更新日期：2023-04-28

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