Enhanced Electrocatalytic Hydrogen Oxidation on Ni/NiO/C Derived from a Nickel‐Based Metal–Organic Framework,Angewandte Chemie International Edition

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Enhanced Electrocatalytic Hydrogen Oxidation on Ni/NiO/C Derived from a Nickel‐Based Metal–Organic Framework
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2019-06-27 , DOI: 10.1002/anie.201905430
Yang Yang ₁ , Xiaodong Sun _{2,

3} , Guanqun Han ₁ , Xi Liu _{4,

5} , Xiangyu Zhang _{2,

3} , Yongfang Sun _{2,

3} , Min Zhang _{2,

3} , Zhi Cao _{2,

3,

4} , Yujie Sun ₁

Affiliation

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.

中文翻译：

镍基金属有机骨架对Ni / NiO / C的增强电催化氢氧化作用

碱性条件下缓慢的氢氧化反应（HOR）阻碍了氢氧化物交换膜氢燃料电池的商业化。开发了一种低成本的Ni / NiO / C催化剂，具有丰富的Ni / NiO界面位点，可作为碱性介质中的一种合格的HOR电催化剂。Ni / NiO / C的HOR活性比其母体Ni / C的HOR活性高一个数量级。此外，在碱性介质中，Ni / NiO / C还比市售Pt / C表现出更好的稳定性和CO耐受性，这使其成为氢燃料电池应用中非常有希望的HOR电催化剂。还进行了密度泛函理论（DFT）计算，以揭示Ni / NiO / C的增强HOR性能。DFT结果表明，氢和氢氧化物均在Ni / NiO界面处获得最佳结合能，

更新日期：2019-06-27

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