Bimetallic NiO/NiFe2O4 heterostructures with interfacial effects for boosting electrochemical water splitting applications

被引：12

作者：

Jesudass, Sebastian Cyril ^{[1
]}

Surendran, Subramani ^{[2
]}

Kim, Joon Young ^{[2
,3
]}

Shanmugapriya, Sathyanarayanan ^{[2
]}

Moon, Dae Jun ^{[2
,3
]}

Janani, Gnanaprakasam ^{[2
]}

Veeramani, Krishnan ^{[1
]}

Mahadik, Shivraj ^{[1
]}

Choi, Jinuk ^{[2
]}

Jung, Pildo ^{[3
]}

Kim, Il Goo ^{[3
]}

Park, Hyunjung ^{[4
]}

Han, Hyun Soo ^{[5
]}

Choi, Heechae ^{[6
]}

Kwon, Gibum ^{[7
]}

Heo, Jaeyeong ^{[1
]}

Hong, Kootak ^{[1
]}

Kim, Tae-Hoon ^{[1
,2
,8
,10
]}

Park, Yong Il ^{[1
,2
,8
,10
]}

Sim, Uk ^{[1
,2
,3
,8
,9
,10
]}

机构：

[1] Chonnam Natl Univ, Dept Mat Sci & Engn, Gwangju 61186, South Korea

[2] Korea Inst Energy Technol KENTECH, Hydrogen Energy Technol Lab, Naju 58330, South Korea

[3] NEEL Sci INC, Res Inst, Naju, South Korea

[4] Chosun Univ, Dept Mat Sci & Engn, Gwangju 61452, South Korea

[5] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA

[6] Xian Jiaotong Liverpool Univ, Dept Chem, Suzhou 215123, Peoples R China

[7] Univ Kansas, Dept Mech Engn, Lawrence, KS 66045 USA

[8] Chonnam Natl Univ, Sch Chem Engn, Gwangju 61186, South Korea

[9] Chonnam Natl Univ, Ctr Energy Storage Syst, Gwangju 61186, South Korea

[10] Korea Inst Energy Technol KENTECH, Hydrogen Energy Technol Lab, Naju 58330, South Korea

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2024年 / 952卷

基金：

新加坡国家研究基金会;

关键词：

Energy conversion; Heterogenous electrocatalysts; Heterostructures; Transition metal oxide; Water splitting; Hydrogen production; OXYGEN EVOLUTION REACTION; HYDROGEN EVOLUTION; BIFUNCTIONAL ELECTROCATALYSTS; OXIDE ELECTROCATALYSTS; EFFICIENT OXYGEN; DOPED CARBON; METAL; STRAIN; NANOPARTICLES; REDUCTION;

D O I：

10.1016/j.jelechem.2023.117947

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The present work reports the simple preparation of NiO/ NiFe2O4 heterostructures with interfacial effects as bifunctional electrocatalysts for overall water splitting. At increasing Ni/Fe precursor ratios, the evolution of NiO phases is observed in NFO heterostructures, which incorporate differential strain effects at the interface. The modulated heterojunction of NiO/NiFe2O4 heterostructure incorporates compressive strain at the interfaces enhancing its electrocatalytic performances. Notably, NiO/NiFe2O4 heterostructure prepared at equimolar Ni/Fe ratios (NFO-1) exhibits significant electrocatalytic performances due to modulated interfacial effects. As such, NFO-1 exhibits lower OER and HER overpotentials of about 242 mV and 106 mV for 10 mA cm-2 current density and exhibits improved water splitting activity, requiring 1.56 V to drive 10 mA cm-2 current density. The present work emphasizes the importance of modulating the heterostructures of transition metal oxides to enhance the interfacial effects as bifunctional electrocatalysts for water splitting applications.

引用

页数：8

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