Activating Commercial Nickel Foam to a Highly Efficient Electrocatalyst for Oxygen Evolution Reaction through a Three-Step Surface Reconstruction,ACS Applied Materials & Interfaces

当前位置： X-MOL 学术 › ACS Appl. Mater. Interfaces › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Activating Commercial Nickel Foam to a Highly Efficient Electrocatalyst for Oxygen Evolution Reaction through a Three-Step Surface Reconstruction
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-12-03 , DOI: 10.1021/acsami.3c14130
Boxu Gao ₁ , Xue Yang ₁ , Xueliang Fan ₁ , Zhuxin Gui ₁ , Wenbiao Zhang _{1,

2} , Yingshuai Jia ₁ , Sinong Wang ₃ , Yahong Zhang ₁ , Qingsheng Gao ₂ , Yi Tang ₁

Affiliation

It is highly desired to directly use commercial nickel foam (CNF) as an electrocatalyst for the oxygen evolution reaction (OER) via simple surface reconstruction. In our research, a simple three-step preactivation process was proposed to reconstruct CNF as an efficient OER catalyst, including calcination, high-voltage treatment, and immersing in electrolyte. The optimal CNF after three-step activation reaches an excellent OER performance of 228 and 267 mV at η₁₀ and η₁₀₀ in alkaline media and can tolerate long-term tests under a large current density of 500 mA·cm^–2. The promotion of each step was explored. The calcination step leads to a reconstructive surficial morphology with an enlarged active surface, providing a prerequisite for the following construction steps. The high-voltage treatment changes the valence of surface Ni species, generating phases with higher catalytic activity, and the immersing process introduces Fe heteroatoms into the surface of CNF, boosting the catalytic performance of CNF through Ni–Fe interactions. This research provides a simple method of making high-performance catalysts with accessible nickel foam, a potential for large-scale application in practical industry, and new thinking for the manipulation of Ni-based catalysts.

中文翻译：

通过三步表面重构将商业泡沫镍活化为析氧反应的高效电催化剂

非常希望通过简单的表面重构直接使用商业泡沫镍（CNF）作为析氧反应（OER）的电催化剂。在我们的研究中，提出了一种简单的三步预活化过程，将 CNF 重建为高效的 OER 催化剂，包括煅烧、高压处理和浸入电解质中。经过三步激活后的最佳CNF在碱性介质中的η ₁₀和η ₁₀₀下达到了228和267 mV的优异OER性能，并且可以耐受500 mA·cm ^–2大电流密度下的长期测试。对每一步的推进进行了探索。煅烧步骤导致具有扩大的活性表面的重建表面形态，为后续构建步骤提供了先决条件。高压处理改变了表面Ni物种的价态，生成具有更高催化活性的相，并且浸泡过程将Fe杂原子引入CNF表面，通过Ni-Fe相互作用提高了CNF的催化性能。该研究提供了一种利用泡沫镍制备高性能催化剂的简单方法，具有在实际工业中大规模应用的潜力，并为镍基催化剂的操控提供了新思路。

更新日期：2023-12-03

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南