Structural and Phase Engineering of a Hierarchical 2D-2D Nickel MOF/Hydroxide-Derived Ni0.85Se/NiTe2 Heterointerface for Robust HER, OER, and Overall Water Splitting

被引：13

作者：

Pathak, Ishwor ^{[1
,2
]}

Prabhakaran, Sampath ^{[1
]}

Acharya, Debendra ^{[1
]}

Chhetri, Kisan ^{[1
]}

Muthurasu, Alagan ^{[1
]}

Rosyara, Yagya Raj ^{[1
]}

Kim, Taewoo ^{[1
]}

Ko, Tae Hoon ^{[1
]}

Kim, Do Hwan ^{[3
]}

Kim, Hak Yong ^{[1
,4
]}

机构：

[1] Jeonbuk Natl Univ, Dept Nano Convergence Engn, Jeonju 54896, South Korea

[2] Tribhuvan Univ, Dept Chem, Amrit Campus, Kathmandu 44613, Nepal

[3] Jeonbuk Natl Univ, Dept Energy Storage Convers Engn BK21 FOUR, Div Sci Educ, Jeonju 54896, Jeonbuk, South Korea

[4] Jeonbuk Natl Univ, Dept Organ Mat & Fiber Engn, Jeonju 561756, South Korea

来源：

SMALL | 2024年 / 20卷 / 52期

基金：

新加坡国家研究基金会;

关键词：

metal-organic framework; Ni0.85Se/NiTe2; heterointerface; selenotellurization; water splitting; HYDROGEN EVOLUTION; ELECTROCATALYSTS;

D O I：

10.1002/smll.202406732

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The development of a nonnoble metal-based cost-effective, efficient, and durable bifunctional electrocatalyst is crucial to achieving the goal of carbon neutrality. In this study, a structural and interfacial engineering approach is employed to design a 2D-2D hierarchical nickel MOF/nickel hydroxide-derived nickel selenide/nickel telluride dual-phase material through a single-step selenotellurization process. The rational design of highly ordered nanoarchitectures provides well-defined voids and ample pathways for ion diffusion. Furthermore, hierarchical nickel selenide/nickel telluride works synergistically at heterojunctions, providing a local ion enrichment mechanism for the catalytic process. As a result, Ni0.85Se/NiTe2@Ni-NH@CC needs an overpotential of 69 and 240 mV to deliver a current density of 10 mA cm(-2) for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively, with an outstanding stability observed for over 100 h. Moreover, the Ni0.85Se/NiTe2@Ni-NH@CC (+, -) device exhibits excellent overall water-splitting performance with a cell voltage of 1.50 V at 10 mA cm(-2) and can be operated steadily for >100 h at 100 mA cm(-2). Density functional theory (DFT) calculations indicate favorable kinetics for H-adsorption at the selenotelluride heterojunction, thereby promoting the HER. This work highlights a new approach for designing a unique nanoarchitecture of MOF/hydroxide-derived selenotelluride heterojunctions for high-efficiency energy conversion applications.

引用

页数：14

共 61 条

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