Surface hydroxyl group-enriched nickel cobalt molybdate hydrate for improved oxygen evolution activity in an anion exchange membrane water electrolyzer

被引：30

作者：

Karmakar, Ayon ^{[1
]}

Senthamaraikannan, Thillai Govindaraja ^{[2
]}

Baasanjav, Erdenebayar ^{[1
]}

Bandyopadhyay, Parthasarathi ^{[1
]}

Jin, Bo ^{[4
,5
]}

Park, Yoo Sei ^{[3
]}

Lim, Dong-Hee ^{[2
]}

Jeong, Sang Mun ^{[1
]}

机构：

[1] Chungbuk Natl Univ, Dept Chem Engn, 1 Chungdae Ro, Cheongju 28644, Chungbuk, South Korea

[2] Chungbuk Natl Univ, Dept Environm Engn, 1 Chungdae Ro, Cheongju 28644, Chungbuk, South Korea

[3] Chungbuk Natl Univ, Dept Adv Mat Engn, 1 Chungdae Ro, Cheongju 28644, Chungbuk, South Korea

[4] Jilin Univ, Minist Educ, Key Lab Automobile Mat, Changchun 130022, Peoples R China

[5] Jilin Univ, Coll Mat Sci & Engn, Changchun 130022, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2023年 / 328卷

关键词：

Nickel cobalt molybdate hydrates; Surface hydroxyl groups gram scale synthesis; Synergistic effect; Oxygen evolution reaction; Anion exchange membrane water electrolyzer; BIFUNCTIONAL ELECTROCATALYST; STABILITY; OXIDATION; EFFICIENT; PERFORMANCE; CRYSTAL; DESIGN; CARBON;

D O I：

10.1016/j.apcatb.2023.122504

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 present report depicts a simple one-step reflux method to fabricate nickel cobalt molybdate hydrate (NCMH) nanostructured rods in gram-scale (>1.8 g). The structure and electrocatalytic oxygen evolution reaction (OER) activity of the NCMH have been explored both experimentally and theoretically. Further, experimental and theoretical analyses indicate that the presence of cobalt in NCMH promotes OH adsorption and enrichment of the NCMH surface with hydroxyl functionalities, which in turn improves the interfacial electrochemistry of NCMH to display better alkaline OER performance than either nickel molybdate hydrate or cobalt molybdate hydrate. In addition, the single cell anion exchange membrane (AEM) water electrolyzer containing an NCMH anode out-performs the commercial IrO2 anode with high current density of-1.0 A cm-2 at 1.82 Vcell and stable perfor-mance for 58 h with-74.57% cell efficiency. Therefore, nickel cobalt molybdenum oxide hydrate nanorods can serve as promising anode materials for AEM water electrolyzers.

引用

页数：12

共 72 条

[1] Precision and correctness in the evaluation of electrocatalytic water splitting: revisiting activity parameters with a critical assessment [J].