Surface reconstruction and directed electron transport in NiSe2/MoSe2 Mott-Schottky heterojunction catalysts promote urea-assisted water splitting

被引：98

作者：

Xu, Xiaocheng ^{[1
]}

Liao, Haijun ^{[1
]}

Huang, Le ^{[1
]}

Chen, Sijie ^{[1
]}

Wang, Rui ^{[1
]}

Wu, Sheng ^{[1
]}

Wu, Yanxue ^{[2
]}

Sun, Zhipeng ^{[1
]}

Huang, Haitao ^{[3
]}

机构：

[1] Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510006, Guangdong, Peoples R China

[2] Guangdong Univ Technol, Anal & Test Ctr, Guangzhou 510006, Guangdong, Peoples R China

[3] Hong Kong Polytech Univ, Dept Appl Phys, Hung Hom, Hong Kong, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2024年 / 341卷

关键词：

Urea oxidation reaction; Hydrogen evolution reaction; Mott-Schottky heterojunction; Surface reconstruction; Directed electron transport; OXIDATION;

D O I：

10.1016/j.apcatb.2023.123312

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The construction of cost-effective electrocatalysts with remarkable activity and durability for the urea oxidation reaction (UOR) is urgently needed to achieve sustainable hydrogen production. Herein, a three-dimensional (3D) nanostructure with uniform NiSe2/MoSe2 Mott-Schottky heterojunction nanoneedle arrays densely grown on carbon cloth was designed and fabricated by a hydrothermal method followed by selenization treatment. In the UOR process, NiSe2/MoSe2 undergoes surface reconstruction into a Mo-NiOOH/NiSe2 composite structure, and Mo-doping can optimize the adsorption/desorption of UOR intermediates. In the hydrogen evolution reaction (HER) process, the directed electron transfer brought by the Mott-Schottky heterojunction can modulate the electronic structure and optimize the d-band center, thus promoting HER. The well-designed NiSe2/MoSe2 as a bifunctional catalyst for urea-assisted electrolysis can reach 10 mA cm-2 at only 1.44 V with almost no performance degradation for 48 h. This work provides a promising avenue to develop efficient HER/UOR bifunctional catalysts toward urea-assisted water electrolysis.

引用

页数：11

共 21 条

[21] Regulating the electronic structure of Ni3Se4-MoSe2 by coupling with ZIF-derived Co@C promotes boosted urea-assisted water splitting at industrial current density
Yuan, Zhengguo
Sun, Xin
Gao, Bo
Fan, Zegui
Yang, Peixia
Feng, Zhongbao
Chemical Engineering Journal, 2024, 499

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