Mechanistic insight into collectively exhaustive CoPi-NPC nanosheets for oxygen reduction reaction and Zn-air battery

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Here, we report a collectively exhaustive CoPi-NPC (cobalt phosphate moieties incorporated into the N, P- doped carbon) nanosheets for oxygen reduction reaction (ORR) and rechargeable zinc-air battery (ZAB) applications. The unprecedented CoPi-NPC nanosheets were synthesized from the cobalt-diethyl dithiocarbamate coordination complex by using room-temperature crystallization and carbonization processes. The fabricated nanosheets catalyze the critical ORR via a four-electron transfer through an associative reaction pathway in which the Osingle bondO bond cleavage can be recognized as the rate-determining step, offering high positive onset (∼0.925 V vs. RHE) and the half-wave potentials (E1/2 = ∼0.796 V vs. RHE). The assembled ZAB based on porous CoPi-NPC-900 air cathode delivered the maximum power density of ∼186 mW cm−2, and large specific capacity of ∼729 mAh g−1. Hence, this study opens up a new avenue to exploit various efficient non-precious electrocatalysts through different transition metal-diethyl dithiocarbamate coordination complexes.
Publisher
ELSEVIER
Issue Date
2022-11
Language
English
Article Type
Article
Citation

APPLIED CATALYSIS B-ENVIRONMENTAL, v.316

ISSN
0926-3373
DOI
10.1016/j.apcatb.2022.121656
URI
http://hdl.handle.net/10203/297365
Appears in Collection
ME-Journal Papers(저널논문)
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