期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 10, 期 17, 页码 5683-5692出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.2c00773
关键词
Nanosheet; Codoping; Superlattice; Oxygen evolution reaction; Electrocatalyst
资金
- National Natural Science Foundation of China [U20A20123, 51874357, 52002405]
- Innovative Research Group of Hunan Provincial Natural Science Foundation of China [2019JJ10006]
- Science and Technology Project of Henan Province [222102240089, 212102210597]
- China Postdoctoral Science Foundation [2020M682352]
This study presents a scalable strategy to design a low-cost and high-performance noble-metal-free electrocatalyst in the field of water electrolysis. The catalyst exhibits superior oxygen evolution reaction (OER) performance and maintains stability during long-term use.
Designing efficient electrocatalysts without noble metals is an imperative challenge for the oxygen evolution reaction (OER) application used in the water-splitting field. However, the low catalytic stability and conductivity impede the industrial application. Herein, the cobalt-substituted manganese oxide (MnCo-O) monolayer nanosheet was exfoliated via intercalation, and the nickel iron double hydroxide (NiFe-OH) nanosheet served as a highly active composition. The oppositely charged MnCo-O and NiFe-OH nanosheet would stack into the superlattice (MnCo/NiFe) with alternating layers of similar to 1 nm. Using potassium hydroxide (KOH) solution as the electrolyte, the MnCo/NiFe composite material delivered superior OER performances, which showed a small overpotential (233 mV) at current density of 10 mA cm(-2) and low Tafel slope (46 mV dec(-1)). Such a catalyst could further present long-term catalytic durability of more than 50 h with almost no attenuation. This study develops a scalable strategy to simultaneously achieve a distinctive structure at a low cost for a high-performance noble-metal-free electrocatalyst.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据