Oxygen reduction reaction activity of Pd-based bimetallic electrocatalysts in alkaline medium

被引：41

作者：

Bampos, Georgios ^{[1
]}

Sygellou, Labrini ^{[2
]}

Bebelis, Symeon ^{[1
]}

机构：

[1] Univ Patras, Dept Chem Engn, Caratheodory 1,Univ Campus, GR-26504 Patras, Greece

[2] Fdn Res & Technol, Inst Chem Engn Sci FORTH ICE HT, Surface Sci Lab, GR-26504 Patras, Greece

来源：

CATALYSIS TODAY | 2020年 / 355卷

关键词：

Oxygen reduction reaction (ORR); Pd; Bimetallic electrocatalysts; Alkaline environment; Rotating disk electrode (RDE); CATALYTIC-ACTIVITY; ELECTRONIC-STRUCTURE; SURFACE SCIENCE; STRAIN CONTROL; M/C M; FE; NANOPARTICLES; PLATINUM; CO; NANOCRYSTALS;

D O I：

10.1016/j.cattod.2019.06.010

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A series of 10 wt.% Pd-M (M: Ag, Ca, Co, Cu, Fe, Ni, Sn, Zn) / C electrocatalysts, with Pd to M mass ratio equal to 3:1, were prepared via the wet impregnation method, physicochemically characterized employing various techniques (BET, XRD, TEM, XPS) and electrochemically characterized towards their ORR activity in 0.1M KOH solution using the RDE technique. Presence of alloy formations was revealed in the bulk of the Pd-Zn and Pd-Sn electrocatalysts. The highest ORR activity was exhibited by the Pd-Cu electrocatalyst, surpassing the activity of the 10 wt.% Pt/C reference. Specific ORR activity higher than that of 10 wt.% Pt/C was also exhibited, in descending order, by the Pd-Zn, Pd-Sn and Pd-Ni electrocatalysts. 10 wt.% Pd/C reference electrocatalyst exhibited the lowest ORR activity among all the tested samples. The superior ORR activity of the Pd-Cu electrocatalyst was mainly associated with an optimum Pd lattice strain.

引用

页码：685 / 697

页数：13

共 64 条

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