过电位
纳米材料基催化剂
材料科学
分解水
纳米结构
贵金属
纳米技术
析氧
氧化物
石墨烯
纳米颗粒
双功能
化学工程
催化作用
电化学
电极
金属
化学
冶金
物理化学
生物化学
工程类
光催化
作者
Xiaoyan Bai,Tianqi Cao,Tianyu Xia,Chenxiao Wu,Menglin Feng,Xinru Li,Ziqing Mei,Han Gao,Dongyu Huo,Xiaoyan Ren,Shunfang Li,Haizhong Guo,Rongming Wang
出处
期刊:Nanomaterials
[MDPI AG]
日期:2023-02-16
卷期号:13 (4): 752-752
被引量:5
摘要
Constructing a heterogeneous interface using different components is one of the effective measures to achieve the bifunctionality of nanocatalysts, while synergistic interactions between multiple interfaces can further optimize the performance of single-interface nanocatalysts. The non-precious metal nanocatalysts MoS2/NiSe2/reduced graphene oxide (rGO) bilayer sandwich-like nanostructure with multiple well-defined interfaces is prepared by a simple hydrothermal method. MoS2 and rGO are layered nanostructures with clear boundaries, and the NiSe2 nanoparticles with uniform size are sandwiched between both layered nanostructures. This multiple-interfaced sandwich-like nanostructure is prominent in catalytic water splitting with low overpotential for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) and almost no degradation in performance after a 20 h long-term reaction. In order to simulate the actual overall water splitting process, the prepared nanostructures are assembled into MoS2/NiSe2/rGO||MoS2/NiSe2/rGO modified two-electrode system, whose overpotential is only 1.52 mV, even exceeded that of noble metal nanocatalyst (Pt/C||RuO2~1.63 mV). This work provides a feasible idea for constructing multi-interface bifunctional electrocatalysts using nanoparticle-doped bilayer-like nanostructures.
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