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Unraveling the pH-dependent oxygen reduction performance on single-atom catalysts

Date:
February 21, 2024
Source:
Advanced Institute for Materials Research (AIMR), Tohoku University
Summary:
Metal-nitrogen-carbon (M-N-C) single-atom catalysts are a promising type of catalyst that could help provide cost-effective alternatives to platinum-based ones. However, there are still some aspects of their behavior that are misunderstood. To rectify this, a group of researchers delved into the intricacies of M-N-C catalysts, yielding promising results.
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The group, which includes Hao Li, Associate Professor at Tohoku University's Advanced Institute for Materials Research (WPI-AIMR), delved deep into the intricacies of M-N-C catalysts, addressing fundamental questions that have long puzzled the scientific community.

Through meticulous analysis of over 100 M-N-C catalyst structures and comprehensive energetic assessments spanning more than 2000 data sets, the researchers uncovered a pH-dependent evolution in the catalytic activity of these materials. Contrary to previous assumptions, the study revealed a nuanced response of M-N-C catalysts to varying pH levels, with some exhibiting remarkable stability and performance across acidic and alkaline environments.

The research also highlighted the intricate interplay between the catalyst's composition and its performance, elucidating factors influencing selectivity for different reaction pathways. By synthesizing a diverse array of M-N-C catalysts and subjecting them to rigorous experimental testing, the team validated their theoretical predictions, affirming the accuracy of their models in predicting key catalytic parameters.

"Our findings represent a significant milestone in the quest for efficient and sustainable catalytic materials," points out Li. "By unraveling the pH-dependence, selectivity, and versatility of M-N-C catalysts, we are paving the way for the development of next-generation catalysts with unprecedented performance and applicability."

Given that pH dependence in electrocatalysis is very common, Li and his colleagues hope to extend this successful model to a variety of catalytic reactions moving forward. "We want to enhance the precision of catalytic theoretical models to enable better screening for high-performance and stable catalysts," adds Li.


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Materials provided by Advanced Institute for Materials Research (AIMR), Tohoku University. Note: Content may be edited for style and length.


Journal Reference:

  1. Di Zhang, Zhuyu Wang, Fangzhou Liu, Peiyun Yi, Linfa Peng, Yuan Chen, Li Wei, Hao Li. Unraveling the pH-Dependent Oxygen Reduction Performance on Single-Atom Catalysts: From Single- to Dual-Sabatier Optima. Journal of the American Chemical Society, 2024; 146 (5): 3210 DOI: 10.1021/jacs.3c11246

Cite This Page:

Advanced Institute for Materials Research (AIMR), Tohoku University. "Unraveling the pH-dependent oxygen reduction performance on single-atom catalysts." ScienceDaily. ScienceDaily, 21 February 2024. <www.sciencedaily.com/releases/2024/02/240221160535.htm>.
Advanced Institute for Materials Research (AIMR), Tohoku University. (2024, February 21). Unraveling the pH-dependent oxygen reduction performance on single-atom catalysts. ScienceDaily. Retrieved April 16, 2024 from www.sciencedaily.com/releases/2024/02/240221160535.htm
Advanced Institute for Materials Research (AIMR), Tohoku University. "Unraveling the pH-dependent oxygen reduction performance on single-atom catalysts." ScienceDaily. www.sciencedaily.com/releases/2024/02/240221160535.htm (accessed April 16, 2024).

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