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Harnessing ‘huge information’ through meta-analysis of economic Pt/C measurements for oxygen discount response


Via information mining about business Pt/C from 514 references, researchers revealed a dependable normal reference for the analysis of latest ORR electrocatalysts from totally different laboratories. Credit: Chinese Journal of Catalysis

Developing low-cost and extremely environment friendly electrocatalysts for oxygen discount response (ORR) to interchange business Pt/C has at all times been desired to tremendously scale back the price of polymer electrolyte membrane (PEM) gasoline cells. The parameter of half-wave potential (E1/2) obtained from linear-sweep voltammetry (LSV) in O2-saturated acid/alkaline medium on a rotating disk electrode (RDE) is often used for characterizing the ORR efficiency of all types of latest electrocatalysts. With larger worth of E1/2, the ORR efficiency turns into higher. For comparability, the E1/2 worth of Pt/C is extensively used as a benchmark.

The intrinsic exercise of a Pt/C catalyst needs to be fastened in precept, whereas the E1/2 worth of the identical kind of economic Pt/C catalyst obtained in numerous labs varies in a variety. Many elements, resembling , diameter of the electrode, Pt loading, scan charge, iR-corrected or not, optimistic or destructive scan carried out, even some , and so forth., appear to have an effect on the obtained remaining “apparent” ORR efficiency of a Pt/C . Such truth makes it troublesome to objectively consider the ORR exercise of latest electrocatalysts from totally different laboratories.

Recently, a analysis crew led by Prof. Weilin Xu from Changchun Institute of Applied Chemistry, CAS and University of Science and Technology of China carried out a meta-analysis of the ORR efficiency of economic Pt/C through from 514 references to disclose the optimum testing situations for probably the most repeatable ORR efficiency of economic Pt/C in each acid and alkaline electrolytes; the optimum Pt loading was 20 μg/cm2 on a 4 mm glassy carbon working electrode. The worth of 0.84 ± 0.03 V was recommended because the “golden reference” of the business Pt/C (with Pt 20 wt.%) ORR half-wave potential for the efficiency analysis of different ORR catalysts in each acid and alkaline electrolytes.


Novel electrocatalyst for proton-exchange membrane fuel cells


More data:
Mingbo Ruan et al, Meta-analysis of economic Pt/C measurements for oxygen discount reactions through information mining, Chinese Journal of Catalysis (2021). DOI: 10.1016/S1872-2067(21)63854-8

Citation:
Harnessing ‘huge information’ through meta-analysis of economic Pt/C measurements for oxygen discount response (2021, December 27)
retrieved 27 December 2021
from https://phys.org/news/2021-12-harnessing-big-meta-analysis-commercial-ptc.html

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