期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 296, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2021.120359
关键词
Methanol-to-formate oxidation; Hydrogen evolution reaction; Synergistic modulation; Hierarchical nanostructure; d-band center
资金
- National Natural Science Foundation of China [51772195]
- Natural Science Foundation of Hebei Province [B2019202210]
- Six Talent Peaks Project in Jiangsu Province [XCL-078]
- Suzhou Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies
The study introduces a ternary catalyst Ru&Fe-WOx for boosting both hydrogen evolution reaction (HER) and methanol-to-formate oxidation (MFO) in alkaline media. By combining experimental and theoretical approaches, the synergy between WOx host and Ru&Fe-based dopants is verified, leading to optimized catalytic efficiency. The unique nanostructure of Ru&Fe-WOx further benefits mass transfer and catalyst robustness at large current densities.
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.
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