Metal-organic framework-derived CoNi-embedded carbon nanocages as efficient electrocatalysts for oxygen evolution reaction
Abstract
The major challenge of electrocatalytic water splitting for hydrogen production is the sluggish kinetics of oxygen evolution reaction (OER). Herein, we report a facile synthesis of CoNi alloy embedded carbon nanocages (CoNi-C) through one-step annealing treatment of bimetallic organic frameworks as the precursors for application as efficient and economical electrocatalysts for OER. As a result, the optimized CoNi-C-200 sample with a Co/Ni atomic ratio of 9:1 exhibits a lower overpotential of 408 mV at a current density of 10 mA cm−2 and a smaller Tafel slope of 83 mV dec−1 compared to as-prepared CoNi-C-100 (410 mV, 93 mV dec−1), CoNi-C-400 (420 mV, 94 mV dec−1), and Co-C (447 mV, 97 mV dec−1). Moreover, it shows an excellent long-term stability during 5000 CV sweeps. Such improved performance can be attributed to the unique morphology and the synergistic effects of CoNi alloy nanoparticles and conductive carbon matrix in the composite.
Publisher URL: https://link.springer.com/article/10.1007/s11581-017-2323-3
DOI: 10.1007/s11581-017-2323-3
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.
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.