Cubic Bi 2 O 3 -Based Electrochemical Nitric Oxide Sensor Using Double Perovskite Oxide Electrodes
Abstract
For achieving a sustainable energy future, energy consumption through renewable sources needs to be maximized and greenhouse emissions should be radically reduced. Automotive exhausts sharing the largest global NO X emissions must meet regulated standards by after-treatment systems (ATS) equipped with smart electronic feedback loops through on-board NO X monitoring. Herein, we demonstrate an efficient (Dy, W) co-doped Bi 2 O 3 -based electrochemical sensing architecture equipped with Ln 2 NiMnO 6 double perovskite oxides (DPOs) as electrode materials for selective nitric oxides (NO) detection. The sensor configuration facilitates operation in a wide temperature range (325 °C–500 °C) with high sensitivity of 50 mV/decade, a response time below 60 sec. and detection abilities as low as 200 ppb. While investigating the impact of rare-Earth cations, a predominant Ni 3+ –O–Mn 3+ interaction and acquisition of optimal e g 1 electron configuration of transition metal atoms in La 2 NiMnO 6 was found responsible for improved electrocatalytic and redox chemical activity that substantiates the sensing behavior. The study carefully scrutinizes the sensing mechanism to abide by the mixed-potential model. Moreover, the durability assessed over a month of operation supported the applicability of presented sensing elements in on-board NO X monitoring systems.
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These sensors achieved a sensitivity of 50 mV/decade, a response time of less than 60 s, a detection limit as low as 200 ppb, and durability for up to 1 month.
“These sensors achieved a sensitivity of 50 mV/decade, a response time of less than 60 s, a detection limit as low as 200 ppb, and durability for up to 1 month.”
From Design Strategies and Emerging Applications of Perovskite-Based Sensors (2025) · cites this paper as [154]
Bhardwaj et al. developed electrodes using double-doped Dy0.8W0.4Bi0.88O1.5-δ and Ln2NiMnO6, enabling operation within the 325°C-500°C range.
“Bhardwaj et al. [154] developed electrodes using double-doped Dy 0.8 W 0.4 Bi 0.88 O 1.5-δ and Ln 2 NiMnO 6 , enabling operation within the 325°C-500°C range (Figure 10B).”
From Design Strategies and Emerging Applications of Perovskite-Based Sensors (2025) · cites this paper as [154]
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- Authors
- Bhardwaj, A., Bae, H., Mathur, L., Mathur, S., & Song, S.-J.
- Affiliations
- University of Cologne (DE)
- Venue
- Journal of The Electrochemical Society
- Publisher
- The Electrochemical Society
- Published
- 2022-11-01
- Volume
- 169
- Issue
- 11
- Pages
- 117510
- ISSN
- 0013-4651 (ISSN-L)
- 1945-7111
- OpenAlex
- W4309224171
- Cited by
- 7
- References
- 48
- Citations by year
- 2026: 2 · 2025: 1 · 2024: 2 · 2023: 2
- FWCI
- 0.34
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Journal of The Electrochemical Society (publishedVersion)
- Funders
- National Research Foundation of Korea (2018R1A5A1025224)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Gas Sensing Nanomaterials and Sensors
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Electrochemical sensors and biosensors
- Physical Sciences › Materials Science › Materials Chemistry › Catalytic Processes in Materials Science
- Keywords
- nitric oxide detection, bismuth oxide, double perovskite oxides, rare earth cations, electrocatalytic activity, mixed potential model, high-temperature sensing, sensor durability
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