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- Title
Enhanced Electrocatalytic Hydrogen Oxidation on Ni/NiO/C Derived from a Nickel‐Based Metal–Organic Framework.
- Authors
Yang, Yang; Sun, Xiaodong; Han, Guanqun; Liu, Xi; Zhang, Xiangyu; Sun, Yongfang; Zhang, Min; Cao, Zhi; Sun, Yujie
- Abstract
The sluggish hydrogen oxidation reaction (HOR) under alkaline conditions has hindered the commercialization of hydroxide‐exchange membrane hydrogen fuel cells. A low‐cost Ni/NiO/C catalyst with abundant Ni/NiO interfacial sites was developed as a competent HOR electrocatalyst in alkaline media. Ni/NiO/C exhibits an HOR activity one order of magnitude higher than that of its parent Ni/C counterpart. Moreover, Ni/NiO/C also shows better stability and CO tolerance than commercial Pt/C in alkaline media, which renders it a very promising HOR electrocatalyst for hydrogen fuel cell applications. Density functional theory (DFT) calculations were also performed to shed light on the enhanced HOR performance of Ni/NiO/C; the DFT results indicate that both hydrogen and hydroxide achieve optimal binding energies at the Ni/NiO interface, resulting from the balanced electronic and oxophilic effects at the Ni/NiO interface.
- Subjects
HYDROGEN oxidation; METAL-organic frameworks; FUEL cells; OXYGEN reduction; DENSITY functional theory; POLAR effects (Chemistry); PROTON exchange membrane fuel cells
- Publication
Angewandte Chemie, 2019, Vol 131, Issue 31, p10754
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201905430