Interfacial Electronic Structure Modulation of NiTe Nanoarrays with NiS Nanodots Facilitates Electrocatalytic Oxygen Evolution. Issue 21 (8th April 2019)

• Record Type: Journal Article
• Authors: Xue, Ziqian; Li, Xia; Liu, Qinglin; Cai, Mengke; Liu, Kang; Liu, Min; Ke, Zhuofeng; Liu, Xialin; Li, Guangqin
• Is Part Of: Advanced materials. Volume 31:Issue 21(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-04-08
• Subjects: electrocatalysis -- electronic structure -- interface engineering -- nickel telluride -- oxygen evolution reaction; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.201900430
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract: Interface engineering has been recognized as one of the most promising strategies for regulating the physical and chemical properties of materials. However, constructing well‐defined nanointerfaces with efficient oxygen evolution reaction (OER) still remains a challenge. Herein, cross columnar NiTe nanoarrays supported on nickel foam are prepared. Subsequently, NiTe/NiS nanointerfaces are constructed by an ion‐exchange process. Importantly, the electrocatalytic performance for the OER can be facilitated by coupling NiTe and NiS. As a result, NiTe/NiS shows excellent OER activity with an ultralow overpotential of only 257 mV at a current density of 100 mA cm −2, and a Tafel slope of 49 mV dec −1 in 1.0m KOH. The calculated and experimental results reveal that the strong electron interaction on nanointerfaces induces electronic structure modulation, which optimizes the binding energy of *OOH intermediates, thus improving the OER performance. Abstract : Cross columnar NiTe/NiS heterojunction nanoarrays are constructed by coupling NiTe and NiS nanodots. The strong electron interaction on nanointerfaces induces electronic structure modulation, thus improving the oxygen evolution reaction (OER) performance.