Boosted Oxygen Evolution Reactivity via Atomically Iron Doping in Cobalt Carbonate Hydroxide Hydrate.

doi:10.1021/acsami.0c07260

Paper

Boosted Oxygen Evolution Reactivity via Atomically Iron Doping in Cobalt Carbonate Hydroxide Hydrate.

Published Aug 11, 2020 · Shan Zhang, Bolong Huang, Liguang Wang

ACS applied materials & interfaces

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Abstract

Cobalt carbonate hydroxide hydrate (CCHH) is long merely functioned as the precursor to prepare the compound catalyst; however, its intrinsic potential for oxygen evolution reaction (OER) is quite limited due to its poor catalytic activity. Herein, a concept has been proposed to solve this issue by atomically doping of iron into CCHH nanowires that grown on nickel foam (defined as Fe-CCHH/NF) for achieving efficient OER catalysis by in-situ electrochemical transformation. The obtained Fe-CCHH/NF-30 exhibits OER catalytic performance with the overpotential of only 200 mV vs. reversible hydrogen electrode (RHE) at the current density of 10 mA cm-2 and small Tafel slope of 50 mV dec-1 in 1 M KOH. Moreover, it displays stability for over 130 h at large current density of 55 mA cm-2 and no activity decline is observed after 3000 cycle test. The performance of Fe-CCHH/NF-30 renders it one of the most promising OER catalysts. The density functional theory calculation result reveals that the atomically dispersed Fe can greatly enhance the OER activity by lowering the reactive energy barrier.

Study Snapshot

Atomically doping iron into cobalt carbonate hydroxide hydrate nanowires significantly enhances oxygen evolution reaction catalysis, making it a promising catalyst for in-situ electrochemical transformation.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

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Boosted Oxygen Evolution Reactivity via Atomically Iron Doping in Cobalt Carbonate Hydroxide Hydrate.

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Citations

Modulating the Oxygen Evolution Reaction of Single-Crystal Cobalt Carbonate Hydroxide via Surface Fe Doping and Facet Dependence.

Fe-doped CoCH nanowires show promising potential as oxygen evolution reaction catalysts due to their optimized adsorption strengths and energy barriers on the (210) facet.

Bi doping induces the quantum dots to improve the supercapacitor performance of cobalt carbonate hydroxide hydrate

Bi doping in cobalt carbonate hydroxide hydrate electrodes improves supercapacitor performance by inducing quantum dots and regulating microstructure.

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