Mo2TiC2T x MXene-Supported Ru/Ni-NiO as an Electrocatalyst for the pH-Universal Hydrogen Evolution Reaction

被引：10

作者：

Liu, Shouda ^{[1
]}

Liu, Lulu ^{[1
]}

Liu, Juanjuan ^{[1
]}

Xiang, Yu ^{[1
]}

Gao, Loujun ^{[1
]}

Fu, Feng ^{[1
]}

Gao, Xiaoming ^{[1
]}

Xuan, Jian ^{[1
]}

机构：

[1] Yanan Univ, Coll Chem & Chem Engn, Shaanxi Prov Key Lab Chem React Engn, Yanan 716000, Shaanxi, Peoples R China

来源：

ACS APPLIED NANO MATERIALS | 2023年 / 6卷 / 23期

基金：

中国国家自然科学基金;

关键词：

Ru nanoclusters; Ni-NiO heterostructures; Mo2TiC2T x MXene; pH-universal; hydrogen evolution reaction; RUTHENIUM-BASED CATALYST; EFFICIENT ELECTROCATALYST; HYBRID;

D O I：

10.1021/acsanm.3c04420

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The hydrogen evolution reaction (HER) is a key step in electrocatalytic water splitting, so developing an efficient and robust pH-universal HER electrocatalyst is highly desirable. Here, we report a facile electrodeposition method to synthesize two-dimensional Mo2TiC2Tx MXene-supported Ru nanoclusters immobilized on a Ni-NiO heterostructure (Ru/Ni-NiO/Mo2TiC2Tx) for an enhanced pH-universal HER. As expected, the as-prepared Ru/Ni-NiO/Mo2TiC2Tx demonstrated outstanding HER performance in full-pH range electrolytes, including diminutive overpotentials (eta(10)) of 41, 49, and 76 mV at a current density of 10 mA cm(-2), low Tafel slopes of 28, 62, and 68 mV dec(-1) in alkaline (1.0 M KOH), acidic (0.5 M H2SO4), and neutral (1.0 M phosphate-buffered solution, pH = 7) electrolytes, respectively. These results outperform the other reported nonprecious-metal electrocatalysts and multimetallic alloy electrocatalysts in the same conditions. Moreover, the operando electrochemical impedance spectroscopy measurements were used to estimate the electrocatalytic HER kinetics of Ru/Ni-NiO/Mo2TiC2Tx, indicating the Mo2TiC2Tx MXene-supported Ni-NiO heterostructure and Ru nanoclusters as excellent functional components in the electrocatalyst and thereby creating a fast charge-transfer kinetics for the HER. This work provided a feasible and convenient avenue to develop a robust and cost-effective pH-universal HER electrocatalyst through an electrochemical method using the Mo2TiC2Tx MXene as supports.

引用

页码：22192 / 22201

页数：10

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