Hollow Iron–Vanadium Composite Spheres: A Highly Efficient Iron‐Based Water Oxidation Electrocatalyst without the Need for Nickel or Cobalt. Issue 12 (14th February 2017)

• Record Type: Journal Article
• Authors: Fan, Ke; Ji, Yongfei; Zou, Haiyuan; Zhang, Jinfeng; Zhu, Bicheng; Chen, Hong; Daniel, Quentin; Luo, Yi; Yu, Jiaguo; Sun, Licheng
• Is Part Of: Angewandte Chemie international edition. Volume 56:Issue 12(2017)
• Page Start: 3289
• Page End: 3293
• Publication Date: 2017-02-14
• Subjects: electrocatalysts -- iron composites -- overpotential -- vanadium -- water oxidation; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201611863
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Noble‐metal‐free bimetal‐based electrocatalysts have shown high efficiency for water oxidation. Ni and/or Co in these electrocatalysts are essential to provide a conductive, high‐surface area and a chemically stable host. However, the necessity of Ni or Co limits the scope of low‐cost electrocatalysts. Herein, we report a hierarchical hollow FeV composite, which is Ni‐ and Co‐free and highly efficient for electrocatalytic water oxidation with low overpotential 390 mV (10 mA cm −2 catalytic current density), low Tafel slope of 36.7 mV dec −1, and a considerable durability. This work provides a novel and efficient catalyst, and greatly expands the scope of low‐cost Fe‐based electrocatalysts for water splitting without need of Ni or Co. Abstract : Missing, but not missed : Vanadium‐doped FeOOH is a low‐cost, highly efficient iron‐based electrocatalyst for water oxidation without Ni or Co participation. It exhibits a low overpotential 390 mV (10 mA cm −2 catalytic current density), low Tafel slope of 36.7 mV dec −1, and a considerable durability.