电催化剂
分解水
塔菲尔方程
双功能
材料科学
析氧
催化作用
化学工程
电化学
制氢
纳米技术
化学
光催化
电极
有机化学
工程类
物理化学
作者
Tabinda Rasheed,Aamir Rasheed,Fatimah Mohammed Alzahrani,Sara Ajmal,Muhammad Farooq Warsi,M.S. Al-Buriahi,Ghulam Dastgeer,Seung-Koo Lee
出处
期刊:Fuel
[Elsevier]
日期:2023-08-01
卷期号:346: 128305-128305
被引量:27
标识
DOI:10.1016/j.fuel.2023.128305
摘要
Electrocatalytic water splitting is a promising approach for the massive production of hydrogen as an environmentally compatible and renewable energy alternative to fossil fuels. The development of an active, stable, low-cost, and bifunctional electrocatalyst, in this regard, is a big challenge to achieve the desired electrocatalytic hydrogen/oxygen production via water splitting. MXene (Ti3C2Tx) has recently been explored as an excellent candidate for electrocatalytic water splitting. However, its poor stability, hazardous synthesis routes, and the restacking of its flakes are the major bottlenecks in its effective application as an electrocatalyst. Herein, we adopted an acid-free wet chemical approach to synthesize MXene and its composites with CoNiFe2O4 for efficient water splitting. We proposed a novel layer-by-layer (LBL) assembly approach to obtain a CoNiFe2O4/MXene-based 2D/NPs/2D network and prevented restacking in MXene flakes for efficient electrocatalysis. The inserted NPs via the LBL approach engaged the delaminated MXene flakes, which results in a high surface area and active sites for water splitting. The fabricated catalyst showed excellent overpotentials of 149 and 17 mV at 10 mA/cm2 for water splitting via OER and HER. In addition, the Tafel slope of 36 and 45 mV/dec was achieved for HER and OER along with high electrochemical stability upto 100 h, which surpassed many similar catalysts that were recently reported in the literature. This study provides insights into the design of multicomponent low-dimensional electrocatalysts for water splitting.
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