Articles


Document Type
Journal article (JA)
Title
An active nanoporous Ni(Fe) OER electrocatalyst via selective dissolution of Cd in alkaline media
Author
Kim, Jun-Hyuk(1); Youn, Duck Hyun(1,2); Kawashima, Kenta(3); Lin, Jie(1,4); Lim, Hyungseob(3); Mullins, C. Buddie(1,3,5)
Address
(1) McKetta Department of Chemical Engineering, University of Texas at Austin, TX; 78712, United States; (2) Department of Chemical Engineering, Kangwon National University, Gangwondaehak-gil, Chuncheon; Gangwon-do; 24341, Korea, Republic of; (3) Department of Chemistry, University of Texas at Austin, TX; 78712, United States; (4) Pen-Tung Sah Micro-Nano Science and Technology Institute, Xiamen University, Xiamen; Fujian; 361006, China; (5) Texas Materials Institute, University of Texas at Austin, TX; 78712, United States
RPAddress
Email
ResearchID
ORCID
Journal
Applied Catalysis B: Environmental
Publisher
Elsevier B.V.
ISSN
0926-3373
Published
2018-06-05, 225:1-7.
JCR
1
ImpactFactor
9.446
ISBN
Fund_Code
HYMC
HYDD
HYKSRQ
HYJSRQ
HYLWLB
HYJB
Keywords
Binary alloys - Deposition - Dissolution - Electrocatalysts - Nickel - Oxygen
Abstract
Although there has been a significant progress regarding electrocatalysts for the electrochemical oxygen evolution reaction, further breakthroughs are still required due to its sluggish 4-electron transfer mechanism. Ni is considered as a potential candidate for the oxygen evolution reaction (OER) in alkaline media in lieu of noble metals, however, the utility of Ni has been limited by the required and relatively high overpotentials. In this study, we fabricated a nanoporous Ni structure by selective and partial dissolution of Cd from a NiCd composite (without using hazardous acids or bases). The formation of nanoporous Ni greatly enhanced OER performance because of the increased number of catalytic sites. Furthermore, there was a promotional electronic effect on the electrocatalyst induced by Cd atoms under the Ni surface tuning the catalytic reactivity could be tuned. Additionally, Fe deposition on the porous Ni-Cd structure significantly raised the OER activity via a reduction in the overpotential from a value of η = 382 mV (before Fe deposition) to η = 290 mV (after Fe deposition) to achieve 10 mA cm?2. ? 2017 Elsevier B.V.
WOS Categories
Chemistry, Physical; Engineering, Environmental; Engineering, Chemical
Accession Number
WOS:000424719300001
UT
20174804457202
DOI
10.1016/j.apcatb.2017.11.053
ESI_Type
CHEMISTRY
Collection
SCIE, EI

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