Physical and electrochemical characterizations of PtPb/C catalyst prepared by pyrolysis of platinum(II) and lead(II) acetylacetonate

Effect of Atomic Ordering on the Activity for Methanol and Formic Acid Oxidation of Pt‐Based Electrocatalysts

“…An interesting comparison of the catalytic activity of disordered PtRu (SA D PtRu ) with that of ordered PtPb (SA O PtPb ) for MOR and FAOR was carried out by Huang et al and Liu et al From the results of Huang et al, the value of the (SA O PtPb /SA D PtRu ) FAOR /(SA O PtPb /SA D PtRu ) MOR ratio obtained by the values of SA O PtPb /SA D PtRu for FAOR and MOR at the same potential (‐0.1 V vs Hg/Hg 2 SO 4 for the FAOR and 0.1 V vs Hg/Hg 2 SO 4 for the MOR) was 1.79. The value of the (MA O PtPb /MA D PtRu ) FAOR /(MA O PtPb /MA D PtRu ) MOR ratio from the averaged values of MA O PtPb /MA D PtRu for FAOR and MOR by the data of Liu et al was 1.74: considering that the value of ECSA is the same for FAOR and MOR; the (MA O PtPb /MA D PtRu ) FAOR /(MA O PtPb /MA D PtRu ) MOR ratio is same as the (SA O PtPb /SA D PtRu ) FAOR /(SA O PtPb /SA D PtRu ) MOR ratio, and both the values of (SA O PtPb /SA D PtRu ) FAOR /(SA O PtPb /SA D PtRu ) MOR ratio were in excellent agreement with the averaged (SA O /SA D ) FAOR /(SA O /SA D ) MOR values of ordered/disordered catalysts previously reported (1.71). Thus, it is reasonable to suppose that the higher (SA O PtPb /SA D PtRu ) FAOR ratio than the (SA O PtPb /SA D PtRu ) MOR ratio should be due to a structural effect (intermetallic vs alloy) rather than to a chemical effect (PtPb vs PtRu).…”

Nitrogen-doped graphene supported highly dispersed palladium-lead nanoparticles for synergetic enhancement of ethanol electrooxidation in alkaline medium

“…Among these elements, Pb seems to have stronger promoting effects. A number of studies have devoted to enhanced electrooxidation of small organic molecules by Pb addition [21][22][23][24][25]. The promoting effects of Pb in the Pd-based catalysts can be attributed to the geometric effect, the electronic effect and the bifunctional mechanism [21].…”

Effects of iron-tetrasulfophthalocyanine on the catalytic activities of Pt/C, PtRu/C, and Pd/C catalysts in a multi-anode direct formic acid fuel cell

“…A number of Pt alloy, inter-metallic, or surface modified catalysts (Pt/Ru, Pt/Pd, Pt/Au, and Pt/Pb), have been reported as the anode catalysts for DFAFCs, and these catalysts have shown better cell performance than pure platinum [6,7,14,19,20,33]. As well, a few Pd-based bi-metallic catalysts (Pd/Au, Pd/P, and Pd/Pt) have also been demonstrated in DFAFC systems, and have shown better cell performance than pure palladium [15,26,27].…”