Evidence map›Paper›PMID 36322657›Full record

ArticleScience advances2022

Identification of the active triple-phase boundary of a non-Pt catalyst layer in fuel cells.

Yu-Cheng Wang, Wen Huang, Li-Yang Wan, Jian Yang, Rong-Jie Xie, Yan-Ping Zheng, Yuan-Zhi Tan, Yue-Sheng Wang, Karim Zaghib, Li-Rong Zheng and 3 more

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Article in Science advances, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

7 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

13 authors.

Yu-Cheng WangState Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.ORCID 0000-0002-3356-3403
Wen HuangState Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.ORCID 0000-0001-7665-9491
Li-Yang WanState Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.ORCID 0000-0002-4646-6127
Jian YangState Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
Rong-Jie XieState Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
Yan-Ping ZhengState Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.ORCID 0000-0002-5564-1257
Yuan-Zhi TanState Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.ORCID 0000-0002-1268-2761
Yue-Sheng WangCenter of Excellence in Transportation Electrification and Energy Storage, Hydro-Québec, Varennes, QC, J3X 1S1, Canada.
Karim ZaghibDepartment of Mining and Materials Engineering, McGill University, Montréal, QC H3A 0C5, Canada.ORCID 0000-0002-4201-7746
Li-Rong ZhengBeijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.ORCID 0000-0003-0888-6769
Shu-Hui SunInstitut National de la Recherche Scientifique (INRS), Centre Énergie Matériaux Télécommunications, Varennes, QC, J3X 1P7, Canada.ORCID 0000-0002-0508-2944
Zhi-You ZhouState Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.ORCID 0000-0001-5181-0642
Shi-Gang SunState Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.ORCID 0000-0003-2327-4090

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The rational design of non-Pt oxygen reduction reaction (ORR) catalysts and catalyst layers in fuel cells is largely impeded by insufficient knowledge of triple-phase boundaries (TPBs) in the micropore and mesopore ranges. Here, we developed a size-sensitive molecular probe method to resolve the TPB of Fe/N/C catalyst layers in these size ranges. More than 70% of the ORR activity was found to be contributed by the 0.8- to 2.0-nanometer micropores of Fe/N/C catalysts, even at a low micropore area fraction of 29%. Acid-alkaline interactions at the catalyst-polyelectrolyte interface deactivate the active sites in mesopores and macropores, resulting in inactive TPBs, leaving micropores without the interaction as the active TPBs. The concept of active and inactive TPBs provides a previously unidentified design principle for non-Pt catalyst and catalyst layers in fuel cells.

Identifiers

PMID36322657
PMCPMC9629713

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