- Title
- Sulfurated metal-organic framework-derived nanocomposites for efficient bifunctional oxygen electrocatalysis and rechargeable Zn- air battery
- Creator
- Wu, Zexing; Wu, Hengbo; Niu, Tengfei; Wang, Shuai; Fu, Gengtao; Jin, Wei; Ma, Tianyi
- Relation
- ACS Sustainable Chemistry & Engineering Vol. 8, Issue 24, p. 9226-9234
- Publisher Link
- http://dx.doi.org/10.1021/acssuschemeng.0c03570
- Publisher
- American Chemical Society
- Resource Type
- journal article
- Date
- 2020
- Description
- The development and rational design of highly efficient and Earth-abundant bifunctional nanomaterials for electrocatalytic oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) act as pivotal roles for the practical applications of rechargeable metal−air batteries. In this article, a Ni−Co-derived metal−organic framework (Ni−Co−MOF) is rapidly formed at ambient temperature, followed by a low-temperature sulfuration process to obtain Ni−Co-based sulfides couple with a nitrogen (N) and sulfur (S)-codoped carbon support with a porous structure (Ni−Co−S/NSC). The designed Ni−Co−S/NSC presents excellent electrocatalytic performances for OER (10 mA cm⁻² @309 mV) and ORR (0.81 V @ E1/2) and a small ΔE (ΔE = Ej10 − E1/2) of 0.73 V in an alkaline electrolyte, enabling its use as an outstanding cathode in rechargeable Zn−air batteries. In situ Raman spectra demonstrated that metal hydroxides formed during OER endowed the obtained electrocatalyst with a predominant catalytic performance. Impressively, a homemade rechargeable Zn− air battery composed by this nanocomposite as the cathode delivered remarkable properties with a peak power density of 137 mW cm⁻² and a high specific capacity of 829 mAh g⁻¹. The battery also demonstrated outstanding long-term stability with a well-maintained porous structure and crystal structure.
- Subject
- metal sulfide; oxygen reduction reaction; oxygen evolution reaction; Zn-air battery; MOF; SDG 7; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1439222
- Identifier
- uon:40859
- Identifier
- ISSN:2168-0485
- Language
- eng
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Goal 7: Ensure access to affordable, reliable, sustainable and modern energy
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