Bifunctional Behavior of Pd/Ni Nanocatalysts on MOF‐Derived Carbons for Alkaline Water‐splitting,Electroanalysis

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Bifunctional Behavior of Pd/Ni Nanocatalysts on MOF‐Derived Carbons for Alkaline Water‐splitting
Electroanalysis ( IF 2.7 ) Pub Date : 2020-10-19 , DOI: 10.1002/elan.202060427
Adewale K. Ipadeola ₁ , Patrick V. Mwonga ₁ , Sekar C. Ray ₂ , Rapela R. Maphanga ₃ , Kenneth I. Ozoemena ₁

Affiliation

Metal‐organic framework derived carbon (MOFDC) serves as supporting platforms for PdNi catalyst (Pd/Ni/MOFDC) and acid‐treated nickel counterpart (Pd/AT‐Ni/MOFDC). The two Pd‐based electrocatalysts are tested for alkaline water‐splitting (i. e., hydrogen evolution (HER) and oxygen evolution reactions (OER)). The results reveal better HER and OER kinetics for Pd/Ni/MOFDC than Pd/AT‐Ni/MOFDC. DFT calculations show that the high performance of the Pd/Ni/MOFDC can be associated with its high conductivity toward adsorbed OH compared to the Pd/AT‐Ni/MOFDC counterpart. The superior overall water‐splitting of Pd/Ni/MOFDC describes the synergy between Ni/Ni(OH)₂ interface and nanostructured Pd for possible future application in an electrolyzer.

中文翻译：

Pd / Ni纳米催化剂在MOF衍生碳上用于碱性水分解的双功能行为

金属有机骨架衍生碳（MOFDC）可作为PdNi催化剂（Pd / Ni / MOFDC）和酸处理镍对应物（Pd / AT-Ni / MOFDC）的支撑平台。对两种基于Pd的电催化剂进行了碱性水分解试验（即析氢（HER）和析氧反应（OER））。结果表明，Pd / Ni / MOFDC的HER和OER动力学优于Pd / AT-Ni / MOFDC。DFT计算表明，与Pd / AT-Ni / MOFDC对应物相比，Pd / Ni / MOFDC的高性能可与其对吸附的OH的高电导率有关。Pd / Ni / MOFDC的出色的总水分解性能描述了Ni / Ni（OH）₂界面与纳米结构Pd之间的协同作用，可用于将来在电解槽中的应用。

更新日期：2020-12-01

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