Optimizing Heterointerface of Co2P-CoxOy Nanoparticles within a Porous Carbon Network for Deciphering Superior Water Splitting

被引：91

作者：

Huang, Guo ^{[1
]}

Hu, Miao ^{[1
]}

Xu, Xingtao ^{[2
]}

Alothman, Asma A. ^{[3
]}

Mushab, Mohammed Sheikh Saleh ^{[3
]}

Ma, Shaojian ^{[1
]}

Shen, Pei Kang ^{[1
]}

Zhu, Jinliang ^{[1
]}

Yamauchi, Yusuke ^{[2
,4
,5
]}

机构：

[1] Guangxi Univ, Collaborat Innovat Ctr Sustainable Energy Mat, Sch Resources Environm & Mat, MOE Key Lab New Proc Technol Nonferrous Met & Mat, Nanning 530004, Peoples R China

[2] Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton WPI MANA, 1 1 Namiki, Tsukuba, Ibaraki 3050044, Japan

[3] King Saud Univ, Coll Sci, Dept Chem, Riyadh 11451, Saudi Arabia

[4] Univ Queensland, Sch Chem Engn, Brisbane, Qld 4072, Australia

[5] Univ Queensland, Australian Inst Bioengn & Nanotechnol AIBN, Brisbane, Qld 4072, Australia

来源：

SMALL STRUCTURES | 2023年 / 4卷 / 06期

基金：

中国国家自然科学基金;

关键词：

bifunctional nanoparticles; electrocatalysts; heterointerface optimizations; water splitting; OXYGEN EVOLUTION; ELECTROCATALYSTS; EFFICIENT; CO3O4; REDUCTION; CONVERSION; NANOSHEETS; VACANCIES; CATALYST;

D O I：

10.1002/sstr.202200235

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：

It is of great significance to design a bifunctional electrocatalyst for promoting hydrogen (HER) and oxygen (OER) evolution reactions simultaneously. Herein, inspired by the appropriate H atom binding energy on cobalt phosphides and excellent oxygen evolution kinetics on cobalt oxides, the regulative synthesis of a Co2P-CoxOy (CoxOy = CoO or Co3O4) heterogeneous nanoparticle-anchored porous carbon network electrocatalyst via one-pot heat treatment is reported. The as-synthesized Co2P-Co3O4/C exhibits superior electrochemical activity with low overpotentials of 86 mV for HER and 246 mV for OER at 10 mA cm(-2) in an alkaline electrolyte. Moreover, compared to the commercial Pt/C || RuO2/C system, the Co2P-Co3O4/C || Co2P-Co3O4/C system presents outstanding activity toward overall water splitting (1.55 V@10 mA cm(-2)), which is well maintained over long-term (120 h) electrocatalysis. Density functional theory calculations show that the rich interfaces between Co2P and Co3O4 offer a synergistic effect, which enables Co2P-Co3O4/C as an excellent electrocatalyst toward both HER and OER.

引用

页数：10

共 64 条

[1] Electrochemically induced surface modifications of mesoporous spinets (Co3O4-δ, MnCo2O4-δ, NiCo2O4-δ) as the origin of the OER activity and stability in alkaline medium [J].