Synergistic modulation of nanostructure and active sites: Ternary Ru&Fe-WOx electrocatalyst for boosting concurrent generations of hydrogen and formate over 500 mA cm-2

被引：45

作者：

Yang, Qifeng ^{[1
]}

Zhang, Cunjin ^{[2
]}

Dong, Bo ^{[1
]}

Cui, Yuchen ^{[1
]}

Wang, Feng ^{[1
]}

Cai, Jiahao ^{[1
]}

Jin, Peng ^{[2
]}

Feng, Lai ^{[1
]}

机构：

[1] Soochow Univ, Coll Energy, Soochow Inst Energy & Mat Innovat, Key Lab Adv Carbon Mat & Wearable Energy Technol, Suzhou 215006, Jiangsu, Peoples R China

[2] Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2021年 / 296卷

基金：

中国国家自然科学基金;

关键词：

Methanol-to-formate oxidation; Hydrogen evolution reaction; Synergistic modulation; Hierarchical nanostructure; d-band center; INITIO MOLECULAR-DYNAMICS; BIFUNCTIONAL ELECTROCATALYSTS; METHANOL; METAL; OXIDATION; W18O49; DECOMPOSITION; NANOPARTICLES; TRANSITION; DENSITY;

D O I：

10.1016/j.apcatb.2021.120359

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：

Coupling methanol-to-formate oxidation (MFO) with hydrogen evolution reaction (HER) may promote hydrogen economics by introducing value-added anodic product. Herein, we develop a ternary catalyst Ru&Fe-WOx for boosting both HER and MFO in alkaline media. An electrode pair based on Ru&Fe-WOx delivers 10/100/500 mA/cm2 current density at a low cell-potential of 1.38/1.50/1.62 V with excellent durability and nearly 100 % Faradaic efficiency (FE), outperforming the benchmark pair of Pt/C||RuO2. By using integrated experimental and theoretical approaches, we verify synergy between WOx host and Ru&Fe-based dopants, which results in optimized H* adsorption on lattice oxygen (HER) as well as enhanced HCOO* desorption on ruthenium site (MFO). In addition, the unique nanostructure of Ru&Fe-WOx may further benefit to the mass transfer and catalyst robustness at large current density. This work thus demonstrates an integrated catalyst design, which is highly efficient for boosting concurrent, cost-effective and scalable production of hydrogen and formate.

引用

页数：12

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