B-Site Engineering in Ruddlesden–Popper Perovskites (A <sub>2</sub> BO <sub>4</sub> ) for H <sub>2</sub> O <sub>2</sub> Production with 4.85% of Solar-to-Chemical Efficiency

The electrochemical synthesis of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) via the oxygen reduction reaction (ORR) offers a promising alternative to the anthraquinone process, addressing environmental concerns without requiring expensive hydrogen. However, developing catalysts that selectively promote the two-electron ORR pathway while maintaining stability remains challenging. Here, we report Ruddlesden-Popper (RP) perovskite oxides as efficient catalysts for selective H<sub>2</sub>O<sub>2</sub> production. Among the tested LaSrBO<sub>4</sub> compositions (B = Ni, Co, Fe, Mn), LaSrNiO<sub>4</sub> (LSN) showed the best two-electron ORR selectivity (∼87%) and activity. Integrated into a photovoltaic-electrochemical system, LSN achieved a solar-to-chemical conversion efficiency of 4.85%, producing a H<sub>2</sub>O<sub>2</sub> production rate of 149.2 μmol cm<sup>-2</sup> h<sup>-1</sup> with good stability over 50 h. Density functional theory calculations attributed this performance to favorable H<sub>2</sub>O<sub>2</sub> formation and desorption kinetics at the Ni B-site. Overall, RP perovskites offer earth-abundant, efficient, and sustainable catalysts for electrochemical H<sub>2</sub>O<sub>2</sub> generation, providing an alternative to carbon- or noble-metal-based systems.

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Journal
Nano Letters
Published
2026-02-19
DOI
https://doi.org/10.1021/acs.nanolett.5c05869
Primary Topic
Chemical Looping and Thermochemical Processes
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article
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article

B-Site Engineering in Ruddlesden–Popper Perovskites (A 2 BO 4 ) for H 2 O 2 Production with 4.85% of Solar-to-Chemical Efficiency

Je Min Yu, June Ho Choi, Wook Jo, Eunjae Jeong et al.
Nano Letters
Chemical Looping and Thermochemical Processes
article

B-Site Engineering in Ruddlesden–Popper Perovskites (A 2 BO 4 ) for H 2 O 2 Production with 4.85% of Solar-to-Chemical Efficiency

Je Min Yu, June Ho Choi, Wook Jo, Eunjae Jeong, Ji-Wook Jang, Jaewon Cho, Hyunjoo Lee, Sang-Goo Lee, Youngchul Kim, Geunsik Lee
article en

Abstract

The electrochemical synthesis of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) via the oxygen reduction reaction (ORR) offers a promising alternative to the anthraquinone process, addressing environmental concerns without requiring expensive hydrogen. However, developing catalysts that selectively promote the two-electron ORR pathway while maintaining stability remains challenging. Here, we report Ruddlesden-Popper (RP) perovskite oxides as efficient catalysts for selective H<sub>2</sub>O<sub>2</sub> production. Among the tested LaSrBO<sub>4</sub> compositions (B = Ni, Co, Fe, Mn), LaSrNiO<sub>4</sub> (LSN) showed the best two-electron ORR selectivity (∼87%) and activity. Integrated into a photovoltaic-electrochemical system, LSN achieved a solar-to-chemical conversion efficiency of 4.85%, producing a H<sub>2</sub>O<sub>2</sub> production rate of 149.2 μmol cm<sup>-2</sup> h<sup>-1</sup> with good stability over 50 h. Density functional theory calculations attributed this performance to favorable H<sub>2</sub>O<sub>2</sub> formation and desorption kinetics at the Ni B-site. Overall, RP perovskites offer earth-abundant, efficient, and sustainable catalysts for electrochemical H<sub>2</sub>O<sub>2</sub> generation, providing an alternative to carbon- or noble-metal-based systems.

Nano Letters
Ibule Photonics (South Korea) (KR), Institute for Basic Science (KR), Ulsan National Institute of Science and Technology (KR)
Responsible consumption and production
Openalex Percentile: Top 51%
Chemical Looping and Thermochemical Processes
DOISourceOpenAlex
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B-Site Engineering in Ruddlesden–Popper Perovskites (A <sub>2</sub> BO <sub>4</sub> ) for H <sub>2</sub> O <sub>2</sub> Production with 4.85% of Solar-to-Chemical Efficiency — Je Min Yu, June Ho Choi, et al. · Nano Letters (2026) | TGRS Research Map | TGRS