Co 3+ -Rich Na 1.95 CoP 2 O 7 Phosphates as Efficient Bifunctional Catalysts for Oxygen Evolution and Reduction Reactions in Alkaline Solution

Implementing sustainable energy conversion and storage technologies is highly reliant on crucial oxygen electrocatalysis, such as the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). However, the pursuit of low cost, energetic efficient and robust bifunctional catalysts for OER a...

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Veröffentlicht in:Chemistry : a European journal 2019-08, Vol.25 (47), p.11007-11014
Hauptverfasser: Gui, Liangqi, Miao, Xiaoyun, Lei, Chengjun, Wang, Kailin, Zhou, Wei, He, Beibei, Wang, Qing, Zhao, Ling
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container_end_page 11014
container_issue 47
container_start_page 11007
container_title Chemistry : a European journal
container_volume 25
creator Gui, Liangqi
Miao, Xiaoyun
Lei, Chengjun
Wang, Kailin
Zhou, Wei
He, Beibei
Wang, Qing
Zhao, Ling
description Implementing sustainable energy conversion and storage technologies is highly reliant on crucial oxygen electrocatalysis, such as the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). However, the pursuit of low cost, energetic efficient and robust bifunctional catalysts for OER and ORR remains a great challenge. Herein, the novel Na-ion-deficient Na CoP O catalysts are proposed to efficiently electrocatalyze OER and ORR in alkaline solution. The engineering of Na-ion deficiency can tune the electronic structure of Co, and thus tailor the intrinsically electrocatalytic performance. Among the sodium cobalt phosphate catalysts, the Na CoP O (NCPO5) catalyst exhibits the lowest ΔE (E -E ) of only 0.86 V, which favorably outperforms most of the reported non-noble metal catalysts. Moreover, the Na-ion deficiency can stabilize the phase structure and morphology of NCPO5 during the OER and ORR processes. This study highlights the Na-ion deficient Na CoP O as a promising class of low-cost, highly active and robust bifunctional catalysts for OER and ORR.
doi_str_mv 10.1002/chem.201901848
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title Co 3+ -Rich Na 1.95 CoP 2 O 7 Phosphates as Efficient Bifunctional Catalysts for Oxygen Evolution and Reduction Reactions in Alkaline Solution
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