Enhancing Trifunctional Electrocatalytic Activities via Lanthanide Modulation in Fe-Co-Based Double Perovskite Oxides

被引:5
作者
Ganguly, Souradip [1 ,2 ]
Datta, Raktim [3 ]
Loha, Chanchal [1 ]
Ghosh, Sirshendu [1 ]
机构
[1] Cent Mech Engn Res Inst, CSIR, Energy Res & Technol Grp, Durgapur 713209, W Bengal, India
[2] Acad Sci & Innovat Res AcSIR, Ghaziabad 201002, India
[3] Indian Assoc Cultivat Sci, Sch Mat Sci, Kolkata 700032, W Bengal, India
关键词
OXYGEN EVOLUTION; CATALYTIC-ACTIVITY; ELECTROLYSIS; REDUCTION; STATE;
D O I
10.1021/acs.energyfuels.4c01611
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
In the global development of alternative and sustainable fuels, H-2 has gained prime research interest as combustion of it results in energy with zero carbon footprint. In this context, non-noble metal-based double perovskite oxides with their wide tunable structure gained interest from researchers as an effective electrocatalyst for water oxidation in alkaline medium. However, their low catalytic efficacy and durability limit their application for the industrial scale. Here, we present several Fe-Co-based double perovskite oxides tuning their A-site with lanthanides for overall water splitting and hybrid electrolysis for energy-saving H-2 production. The best Fe-Co-based double perovskite oxide, Eu2FeCoO6, demonstrates very high trifunctional electrocatalytic activity for oxygen evolution reaction (OER) and small alcohol molecule oxidation, along with hydrogen evolution reaction (HER). Overpotentials (eta(10)) of 220 mV for the OER and 238 mV for the HER were attained at 10 mA cm(-2) current density in 1 M NaOH (pH = 14). Also, Faradaic yields of 85 and 89% were achieved for ethanol oxidation (EtOR) and benzyl alcohol oxidation (BnOR), respectively, with the best catalyst. Moreover, in a two-electrode electrolyzer with 0.1 M benzyl alcohol (as an electrolyte) and Eu2FeCoO6 as a bifunctional catalyst (both as the cathode and anode, Eu2FeCoO6 (-)parallel to Eu2FeCoO6 (+)), a cell potential of 1.75 V was enough for oxygenation of benzyl alcohol along with the production of H-2. A 150 mV advantage in cell potential was gained in BnOR-aided H-2 generation compared with overall water oxidation.
引用
收藏
页码:13196 / 13205
页数:10
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