Modulating the Electrocatalytic Performance of Palladium
with the Electronic Metal–Support Interaction: A Case Study
on Oxygen Evolution Reaction
Posted on 2018-06-08 - 00:00
The
present work reports a general approach to improve the electrocatalytic
property of noble metal through regulating its electron status by
introducing the electronic metal–support interaction (EMSI).
As a case study, the catalytic activity of metallic Pd toward oxygen
evolution reaction (OER) in alkaline solution has been significantly
promoted by stabilizing Pdδ+ oxidic species at the
interface of the Pd–metal oxide support with the help of EMSI
effect, suggesting an intrinsic advantage of Pdδ+ in driving OER. We further demonstrate that the chemical state of
Pdδ+ can be easily modulated in the range of 2+ to
3+ by changing the metal oxide support, interestingly, accompanied
by a clear dependence of the OER activity on the oxidation state of
Pdδ+. The high Pd3+ species-containing
Fe2O3/Pd catalyst has fed an impressively enhanced
OER property, showing an overpotential of 383 mV at 10 mA cm–2 compared to those of >600 mV on metallic Pd and 540 mV on Fe2O3/glassy carbon. The greatly enhanced OER performance
is believed to primarily derive from the distinctive improvement in
the adsorption of oxygenated intermediates (e.g., *OH and *OOH) on
metal-oxide/Pd catalysts. Moreover, similar EMSI induced improvements
in OER activity in alkaline solution are also achieved on both of
the Fe2O3/Au and Fe2O3/Pt, which possess the oxidic species of Au3+, and Pt2+ and Pt4+, respectively.
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He, Hongyang; Chen, Junxiang; Zhang, Dafeng; Li, Fang; Chen, Xin; Chen, Yumei; et al. (2018). Modulating the Electrocatalytic Performance of Palladium
with the Electronic Metal–Support Interaction: A Case Study
on Oxygen Evolution Reaction. ACS Publications. Collection. https://doi.org/10.1021/acscatal.8b00460
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AUTHORS (11)
HH
Hongyang He
JC
Junxiang Chen
DZ
Dafeng Zhang
FL
Fang Li
XC
YC
Yumei Chen
LB
Linyan Bian
QW
Qiufen Wang
PD
Peigao Duan
ZW
Zhenhai Wen
XL
Xiaojun Lv