ZIF-67-derived CoP/NC effectively supported Pt nanoparticles for methanol oxidation reaction

Abstract

Metal-support interaction plays an important role in the catalysis reaction, and effective support is highly desired in the hybrid catalyst construction. Herein, we demonstrated an effective catalyst system by coupling...

Anchoring Ultrasmall Pt Nanocrystals onto Carbon Nanohorn-Decorated 3D Graphene Networks to Boost Methanol Oxidation Reaction

“…With a fixed electrode potential of 0.5 V, the MOR current on each electrode shows a downward trend as time goes on (Figure 6(a)), mainly due to the accumulation of CO-like by-products and the inevitable formation of Pt oxide on the electrode surface [42]. Remarkably enough, the Pt/(CNH) 5 -G 5 electrode has a high initial oxidation current and maintains a slow decay rate of only 28.9% after 3000 s (Figure 6(b)), which is much better than that of the reference Pt/CNH, Pt/G, Pt/CNT, and Pt/C as well as previously reported Pt-based catalysts [43,44], thus affording an exceptional long-term MOR stability. This significant improvement is not only linked to the 3D interconnected frameworks of Pt/(CNH) 5 -G 5 for the rapid separation of CO species but also originated from the strong interfacial interaction between Pt and CNH-G matrix that could prevent the Pt nanoparticles from aggregation and dissolution during the catalytic process.…”

Insights into the enhanced electrochemical sensing behavior of hydroquinone and catechol simultaneously enabled by ultrafine layer CoP–NiCoP heterostructure on graphene frameworks

“…21 Nevertheless, the CoP peak intensity is different compared with some reported CoP obtained from cobalt oxides such as derived by zeolitic imidazolate framework-67 and then phosphorizated with NaH 2 PO 2 , which may be because of the difference between metal hydroxide and metal oxide affecting both the phosphating and crystallinity degrees. 28,29 Besides, the wide diffraction peak at approximately 23.19°is assigned to GFs graphitic carbon structure. 18 In addition, the XRD patterns of Ni 1−x Co x P/GFs precursors (Ni 1−x Co x LDH/GFs) are also provided in Fig.…”

Green fabrication of ultrafine N-Mo x C/CoP hybrids for boosting electrocatalytic water reduction

“…Various strategies have been explored to prepare CoP with more exposed active sites and improved electroactivity. Recently, zeolitic imidazolate frameworks (ZIFs) with zeolite-like 3D porous structures and abundant metal ions were considered good precursor templates for designing porous nanostructured metal-carbon hybrids and the corresponding phosphide derivatives with improved catalytic performance [14,15]. For instance, cobalt phosphide nanorods made by direct chemical transformation of ZIF-67-Co precursor showed improved HER activity and long-term stability in acidic environments [16].…”