3 years ago

3D Self-Supported Fe-Doped Ni2P Nanosheet Arrays as Bifunctional Catalysts for Overall Water Splitting

3D Self-Supported Fe-Doped Ni2P Nanosheet Arrays as Bifunctional Catalysts for Overall Water Splitting
Peilei He, Qian Zhang, Yingjie Li, Ming Jiang, Haichuan Zhang, Xiaoming Sun
The development of highly efficient bifunctional electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is crucial for improving the efficiency of overall water splitting, but still remains challenging issue. Herein, 3D self-supported Fe-doped Ni2P nanosheet arrays are synthesized on Ni foam by hydrothermal method followed by in situ phosphorization, which serve as bifunctional electrocatalysts for overall water splitting. The as-synthesized (Ni0.33Fe0.67)2P with moderate Fe doping shows an outstanding OER performance, which only requires an overpotential of ≈230 mV to reach 50 mA cm−2 and is more efficient than the other Fe incorporated Ni2P electrodes. In addition, the (Ni0.33Fe0.67)2P exhibits excellent activity toward HER with a small overpotential of ≈214 mV to reach 50 mA cm−2. Furthermore, an alkaline electrolyzer is measured using (Ni0.33Fe0.67)2P electrodes as cathode and anode, respectively, which requires cell voltage of 1.49 V to reach 10 mA cm−2 as well as shows excellent stability with good nanoarray construction. Such good performance is attributed to the high intrinsic activity and superaerophobic surface property. 3D self-supported Fe-doped Ni2P nanosheet arrays are fabricated by hydrothermal method and in situ phosphorization. The performance of the nanosheet arrays toward overall water splitting depends on the Fe doping ratio. An alkaline electrolyzer using two identical (Ni0.33Fe0.67)2P nanosheet arrays electrodes can operate at 10 mA cm-2 under 1.49 V.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/adfm.201702513

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.