Heterometallic Feed Ratio‐Dominated Oxygen Evolution Activity in Self‐Supported Metal‐Organic Framework Nanosheet Arrays Electrocatalyst. Issue 17 (3rd September 2020)

• Record Type: Journal Article
• Authors: Li, Rui‐Jie; Qi, Yu‐Feng; Wang, Qian; Wang, Jia‐Jun; Liu, Zheng‐Yu; Wang, Xiu‐Guang; Zhao, Xiao‐Jun; Yang, En‐Cui
• Is Part Of: Zeitschrift für anorganische und allgemeine Chemie. Volume 646:Issue 17(2020)
• Page Start: 1412
• Page End: 1418
• Publication Date: 2020-09-03
• Subjects: Oxygen evolution reaction -- Metal‐organic frameworks -- Electrocatalyst -- Nanosheet array -- Electrocatalytic activity; Chemistry, Inorganic -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1002/zaac.202000121
• Languages: English
• ISSNs: 0044-2313

Abstract

Abstract : Developing earth‐abundant, highly active and long‐term durable electrocatalysts for oxygen evolution reaction (OER) is highly desirable and great challenging for large‐scale industrial application of electrochemical water splitting. Herein, in‐situ growth of uniform nanosheet arrays on nickel foam (NF) is hydrothermally achieved by varying feed ratios of Fe III and Ni II salts. The feed ratio of the two active metals has significantly dominated both the morphological and electronic structures of the resultant electrocatalysts, leading to feed ratio‐dependent volcano‐type OER activity. The optimized Fe0.89 Ni0.11 ‐BDC/NF exhibits the best OER performance, affording a low overpotential of 220 mV to drive a current density of 50 mA· cm –2 with small Tafel slope of 44.8 mV· dec –1 and long‐lasting stability over 20 hours. The synergistic effect from the Fe III and Ni II species on both the morphological and electronic structure modulations have dramatically accelerated the reaction kinetics, responsible eventually for the enhanced OER activity. This work provides valuable information for nanostructured MOFs as efficient electrocatalysts. Abstract :