In:
Advanced Functional Materials, Wiley, Vol. 31, No. 32 ( 2021-08)
Abstract:
The design of highly active, stable, and low‐cost electrocatalysts for the oxygen evolution reaction (OER) in proton exchange membrane water electrolyzer remains a challenge. RuO 2 shows relatively low cost but poor stability. Here, the critical role of sulfate anion doping in promoting OER activity and stability of RuO 2 is reported. Coupled with the Fe cation doping, the sulfate‐functionalized RuFeO x (S‐RuFeO x ) displays a remarkable OER performance with a low overpotential of 187 mV at 10 mA cm −2 in acid, and much enhanced stability. The excellent OER activity of S‐RuFeO x is attributed to the dual positive effects that the sulfate dopants weaken the adsorption of the *OOH intermediate, and Fe dopants promote the deprotonation of chemisorbed water molecules to form *OOH. The enhanced stability is in part due to the sulfate dopants which stabilize the lattice oxygen. These results demonstrate that the anion and cation co‐doped RuO 2 is a promising candidate for highly efficient OER electrocatalysts.
Type of Medium:
Online Resource
ISSN:
1616-301X
,
1616-3028
DOI:
10.1002/adfm.202101405
Language:
English
Publisher:
Wiley
Publication Date:
2021
detail.hit.zdb_id:
2029061-5
detail.hit.zdb_id:
2039420-2
SSG:
11
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