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Rational design of ...
Rational design of Ruddlesden–Popper perovskite electrocatalyst for oxygen reduction to hydrogen peroxide
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Han, Ning (author)
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- Feng, Shihui (author)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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Guo, Wei (author)
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Martinez Mora, Omar (author)
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Zhao, Xiaolin (author)
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Zhang, Wei (author)
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Xie, Sijie (author)
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Zhou, Zhenyu (author)
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Liu, Zhiwei (author)
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Liu, Qiong (author)
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Wan, Kai (author)
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Zhang, Xuan (author)
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Fransaer, Jan (author)
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(creator_code:org_t)
- 2022-06-04
- 2022
- English.
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In: SusMat. - : Wiley. - 2766-8479 .- 2692-4552. ; 2:4, s. 456-465
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
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- Although the oxygen reduction process to hydrogen peroxide (H2O2) is a green option for H2O2 generation, the low activity and selectivity hindered the industry's process. In recent years, the electrochemical synthesis of H2O2 through a 2e– transfer method of oxygen reduction reaction (ORR) has piqued the interest of both academics and industry. Metal oxide catalysts have emerged as a novel family of electrochemical catalysts due to their unusual physical, chemical, and electrical characteristics. In this work, we first developed a Ruddlesden–Popper perovskite oxide (Pr2NiO4+δ) as a highly selective and active catalyst for 2e– ORR to produce H2O2. Molybdenum was introduced here to adjust the oxidation states of these transition metals with successful substitution into Ni-site to prepare Pr2Ni1-xMoxO4+δ, and the molybdenum substitution improves the H2O2 selectivity during the ORR process, in 0.1 M KOH, from 60% of Pr2NiO4+δ to 79% of Pr2Ni0.8Mo0.2O4+δ at 0.55 V versus RHE. A limiting H2O2 concentration of 0.24 mM for Pr2NiO4+δ and 0.42 mM for Pr2Ni0.8Mo0.2O4+δ was obtained at a constant current of 10 mA/cm2 using a flow-cell reactor using a gas-diffusion electrode.
Subject headings
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Keyword
- electrocatalysis
- hydrogen peroxide
- oxygen reduction reaction (ORR)
- perovskite
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Han, Ning
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Feng, Shihui
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Guo, Wei
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Martinez Mora, O ...
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Zhao, Xiaolin
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Zhang, Wei
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show more...
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Xie, Sijie
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Zhou, Zhenyu
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Liu, Zhiwei
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Liu, Qiong
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Wan, Kai
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Zhang, Xuan
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Fransaer, Jan
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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SusMat
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Stockholm University