Unique heterointerface engineering of Ni2P-MnP nanosheets coupled Co2P nanoflowers as hierarchical dual-functional electrocatalyst for highly proficient overall water-splitting

被引：146

作者：

Kandel, Mani Ram ^{[1
,2
]}

Pan, Uday Narayan ^{[1
]}

Dhakal, Purna Prasad ^{[1
]}

Ghising, Ram Babu ^{[1
]}

Nguyen, Thanh Tuan ^{[1
]}

Zhao, Junhuan ^{[3
]}

Kim, Nam Hoon ^{[1
]}

Lee, Joong Hee ^{[1
,4
]}

机构：

[1] Jeonbuk Natl Univ, Dept Nano Convergence Engn BK21 FOUR, Jeonju 54896, Jeonbuk, South Korea

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

[3] Zhejiang RUICO Adv Mat Co Ltd, 188 Liangshan Rd, Huzhou, Zheijiang, Peoples R China

[4] Jeonbuk Natl Univ, Carbon Composite Res Ctr, Dept Polymer Nano Sci & Technol, Jeonju 54896, Jeonbuk, South Korea

来源：

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2023年 / 331卷

基金：

新加坡国家研究基金会;

关键词：

Dual-functional electrocatalyst; Hybrid heterostructure; Heterointerface interaction; Phosphidation; Overall water-splitting; HYDROGEN EVOLUTION REACTION; BIFUNCTIONAL CATALYSTS; EFFICIENT; SULFUR; DRIVEN; FILMS; FOAM; OER;

D O I：

10.1016/j.apcatb.2023.122680

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：

A noble-metal-free electrocatalyst comprised of hybrid Ni2P-MnP nanosheet coupled with Co2P nanoflowers (Ni2P-MnP@Co2P) reinforced on nickel foam has been achieved with a unique heterostructure architecture for highly competent hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Tri-phased Ni2P-MnP@Co2P nanocrystal offers tremendously active and robust electrocatalytic efficacy heralded by low HER (60 mV) and OER (255 mV) to achieve (10 and 30) mA cm-2 current densities, respectively. The outstanding electrochemical performance is due to the distinctive architectural feature, high surface area with optimum porosity, bountiful Ni2P-MnP and Co2P heterointerface interaction, and synergism among Ni2P, MnP, and Co2P multi-active sites. The Ni2P-MnP@Co2P (+,-) alkaline electrolyzer delivers a low cell voltage of 1.50 V at a current density of 10 mA cm- 2, along with astonishing long-term robustness. Moreover, the electrocatalyst displays a Faradaic yield of around (97.2 and 97.9) % at 50 mA cm-2 for H2 and O2 respectively. This work is expected to pave the way for novel insights into the fabrication of efficient electrocatalysts for practical watersplitting applications.

引用

页数：15

共 84 条

[1] Immoderate nanoarchitectures of bimetallic MOF derived Ni-Fe-O/NPC on porous carbon nanofibers as freestanding electrode for asymmetric supercapacitors [J].