Co2+-P(W3O10)43− modified activated carbon as an efficient anode catalyst for direct glucose alkaline fuel cell. (29th June 2022)

• Record Type: Journal Article
• Authors: Li, Yang; Dong, Feng; Jiao, Shipu; Wang, Jiao; Dai, Yexin; Irfan, Muhammad; Liu, Xianhua
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 54(2022)
• Page Start: 22952
• Page End: 22962
• Publication Date: 2022-06-29
• Subjects: Polyoxometalate -- Cobalt -- Direct glucose alkaline fuel cell -- Activated carbon; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.05.104
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Highly efficient and economical electrocatalysts is crucial to the large-scale application of direct glucose alkaline fuel cells (DGAFC). Here, we present a DGAFC with excellent performance by using a Lewis-acidic POM (Co 2+ -P(W3 O10 )4 3− ) modified activated carbon (AC) as anode catalyst. Three kinds of Lewis-acidic cations (Ni 2+, Co 2+, Fe 3+ ) were introduced into polyoxometalates (POMs) and the obtained Lewis-acidic POMs were immobilized on AC anode via a simple doping and rolling method. Our results demonstrated that the catalytic activities of POMs for glucose oxidation can be remarkably improved by the introduction of Lewis acidity. The maximum power density of the DGAFC reached 35.78 W m −2 at ambient temperature, which is almost 1.64 times higher than the bare AC control (21.88 W m −2 ), considerably outperforming the performance of previously published low-temperature DGAFCs. The catalytic enhancement by the Lewis-acidic POMs is speculatively attributed to the synergic effect between two redox couples (Co 2+ /Co 3+ and [(PW)12 ]Re /[(PW)12 ]Ox ) on glucose oxidation. Our study will help develop cost-effective, high-performance and environmentally benign catalyst for glucose oxidation and electricity generation. Graphical abstract: Image 1 Highlights: Lewis-acidic POMs were fabricated for catalytic oxidation of glucose. Activity of POMs was remarkably improved by introduction of Lewis acidity. The catalytic mechanism of Co-PW12 for glucose oxidation was proposed. Lewis-acidic POMs show great potential for DGAFC applications.