Fabricating bimetallic cobalt-iron MOF nano/microcrystalline particles: strong bifunctional electrocatalytic activity and overall water splitting

IF 3.5 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Dalton Transactions Pub Date : 2025-01-29 DOI:10.1039/d4dt03102d

Gunasekaran Arunkumar, Govindan Deviga, Mariappan Mariappan, Mehboobali Pannippara, Abdullah G. Al-Sehemi, Savarimuthu Philip Anthony

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引用次数: 0

Abstract

Cobalt/iron terephthalic acid (CoFeTPA) metal organic frameworks with nano/microcrystalline structures were synthesized and investigated their bifunctional electrocatalytic OER, HER and overall water splitting in alkaline medium. Co-TPA produced microcrystalline particles whereas FeTPA produced nano/microrods. Bimetallic CoFeTPA exhibited broken microrods/particles with varying the ratio of Co and Fe. FeTPA showed relatively stronger OER activity (220 mV overpotential for 10 mA/cm2) compared to CoTPA and bimetallic CoFeTPA. In contrast, bimetallic CoFeTPA displayed better HER activity (202 mV overvoltage for 10 mA/cm2) compared to CoTPA and FeTPA. The strong bifunctional activity of CoFeTPA was utilized for overall water splitting. Bimetallic CoFeTPA catalyst required 1.68 V and cell voltage to achieve 10 mA/cm2 current density. The bimetallic MOF was further utilized for sea water splitting. The current-time studies indicated good stability of the catalyst for over 12 hr. After catalysis analysis indicated that bimetallic CoFeTPA MOF produced catalytic active cobalt oxyhydroxide and iron oxyhydroxide during the catalysis. Thus, the present work suggests the opportunity to fabricate cost effective bifunctional electrocatalyst by integrating multiple metal ions in the MOFs.

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来源期刊

Dalton Transactions 化学-无机化学与核化学

CiteScore

6.60

自引率

7.50%

发文量

1832

审稿时长

1.5 months

期刊介绍： Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.